The treatment of POME related contamination is complicated due to its high organic contents and complex composition.Membrane technology is a prominent method for removing POME contaminants on account of its efficiency...The treatment of POME related contamination is complicated due to its high organic contents and complex composition.Membrane technology is a prominent method for removing POME contaminants on account of its efficiency in removing suspended particles,organic substances,and contaminants from wastewater,leading to the production of high-quality treated effluent.It is crucial to achieve efficient POME treatment with minimum fouling through membrane advancement to ensure the sustainability for large-scale applications.This article comprehensively analyses the latest advancements in membrane technology for the treatment of POME.A wide range of membrane types including forward osmosis,microfiltration,ultrafiltration,nanofiltration,reverse osmosis,membrane bioreactor,photocatalytic membrane reactor,and their combinations is discussed in terms of the innovative design,treatment efficiencies and antifouling properties.The strategies for antifouling membranes such as self-healing and self-cleaning membranes are discussed.In addition to discussing the obstacles that impede the broad implementation of novel membrane tech nologies in POME treatment,the article concludes by delineating potential avenues for future research and policy considerations.The understanding and insights are expected to enhance the application ofmembrane-basedmethods in order to treat POME more efficiently;this will be instrumental in the reduction of environmental pollution.展开更多
Membrane technology is becoming more important for CO,_ separation from natural gas in the new era due to its process simplicity, relative ease of operation and control, compact, and easy to scale up as compared with ...Membrane technology is becoming more important for CO,_ separation from natural gas in the new era due to its process simplicity, relative ease of operation and control, compact, and easy to scale up as compared with conventional processes. Conventional processes such as absorption and adsorption for CO2 separation from natural gas are generally more energy demanding and costly for both operation and maintenance. Polymeric membranes are the current commercial membranes used for CO2 separation from natural gas. However, polymeric membranes possess drawbacks such as low permeability and selectivity, plasticization at high temperatures, as well as insufficient thermal and chemical stability. The shortcomings of commercial polymeric membranes have motivated researchers to opt for other alternatives, especially inorganic membranes due to their higher thermal stability, good chemical resistance to solvents, high mechanical strength and long lifetime. Surface modifications can be utilized in inorganic membranes to further enhance the selectivity, permeability or catalytic activities of the membrane. This paper is to provide a comprehensive review on gas separation, comparing membrane technology with other conventional methods of recovering CO2 from natural gas, challenges of current commercial polymeric membranes and inorganic membranes for CO2 removal and membrane surface modification for improved selectivity.展开更多
Palm oil industry is the most important agro-industry in Malaysia, but its by-product-palm oil mill effluent （POME）, posed a great threat to water environment. In the past decades, several treatment and disposal met...Palm oil industry is the most important agro-industry in Malaysia, but its by-product-palm oil mill effluent （POME）, posed a great threat to water environment. In the past decades, several treatment and disposal methods have been proposed and investigated to solve this problem. A two-stage pilot-scale plant was designed and constructed for POME treatment. Anaerobic digestion and aerobic biodegradation constituted the first biological stage, while ultrafiltration （UF） and reverse osmosis （RO） membrane units were combined as the second membrane separation stage. In the anaerobic expanded granular sludge bed （EGSB） reactor, about 43% organic matter in POME was converted into biogas, and COD reduction efficiency reached 93% and 22% in EGSB and the following aerobic reactor, respectively. With the treatment in the first biological stage, suspended solids and oil also decreased to a low degree. All these alleviated the membrane fouling and prolonged the membrane life. In the membrane process unit, almost all the suspended solids were captured by UF membranes, while RO membrane excluded most of the dissolved solids or inorganic salts from RO permeate. After the whole treatment processes, organic matter in POME expressed by BOD and COD was removed almost thoroughly. Suspended solids and color were not detectable in RO permeate any more, and mineral elements only existed in trace amount （except for K and Na）. The high-quality effluent was crystal clear and could be used as the boiler feed water.展开更多
In the process of ecological environment construction in China, the construction and implementation of environmental protection projects are of great significance. The wide application of water treatment technology ca...In the process of ecological environment construction in China, the construction and implementation of environmental protection projects are of great significance. The wide application of water treatment technology can gradually alleviate the problem of shortage of freshwater resources and achieve sustainable development and protection of water resources. The article firstly introduces several ultrafiltration membrane technologies commonly used in environmental engineering water treatment;then expounds the advantages of ultrafiltration membrane technology;finally, discusses the practical application of ultrafiltration membrane technology, in order to provide theoretical and practical basis for related research.展开更多
With the acceleration of the urbanization process, the demand for domestic water and industrial water is increasing. Strengthening the development and protection of water resources is the only way to implement the con...With the acceleration of the urbanization process, the demand for domestic water and industrial water is increasing. Strengthening the development and protection of water resources is the only way to implement the concept of green sustainable development. The water resources treatment process is affected by various factors. Ultrafiltration membrane technology improves the utilization rate of water resources, reduces energy consumption, and reduces the damage to the environment. It is widely used in the water treatment field of environmental protection projects, and is an important technical road to realize the sustainable development of water resources.展开更多
With the rapid development of society, water environmental pollution is becoming more and more serious. Industrial wastewater pollution is an important aspect. Under the guidance of environmental protection standards ...With the rapid development of society, water environmental pollution is becoming more and more serious. Industrial wastewater pollution is an important aspect. Under the guidance of environmental protection standards and policies, departments and research units are continuously increasing research and development of industrial water pollution treatment technologies, aiming at continuously researching new processes, technologies and equipment on the basis of the original conventional wastewater treatment processes, and more applying them to industrial wastewater treatment. Among them, membrane treatment process and technology are more and more applied to various industrial wastewater treatment projects. The process of separating media through selective membrane is the process of membrane separation technology. In this process, the separation, purification and concentration of the mixture need to be achieved through external force. In the process of membrane technology being fully applied to the purification and treatment of industrial wastewater, the value of membrane technology can be better exerted, the pollution of industrial wastewater to the water environment can be minimized, and the development of social and ecological civilization can be promoted.展开更多
As a highly complex aqueous effluent, tannery wastewater from leather industry should be treated appropriately before discharging into the environment. Membrane technology has been shown to be a promising approach for...As a highly complex aqueous effluent, tannery wastewater from leather industry should be treated appropriately before discharging into the environment. Membrane technology has been shown to be a promising approach for tannery wastewater treatment as it may achieve “Zero Liquid Discharge(ZLD)”. This work, as the state-of-the-art, attempts to review the world-wide research trends of membrane technologies, the technical recapitulation and recent advances of such technology for tannery wastewater treatment. Generally, manufacture membrane, membrane-based integrated process, MBR, NF, UF and RO are the hotspots in this field. Details of different membrane technologies configured for tannery wastewater treatment, such as membrane materials, scale, membrane modules, operating conditions and removal efficiency of pollutants, are also summarized. It should be noted that membrane fouling is still a major challenge in the membrane technology during tannery wastewater treatment. Therefore, process coupling, either within diverse membrane technologies or between membrane and non-membrane technologies, is considered as a promising alternative to treat the leather tannery wastewater in the future.展开更多
With the relentless expansion of human economic activities,a substantial increase in CO_(2)emissions has been observed,primarily stemming from the rampant combustion of fossil fuels.This relentless surge has undeniabl...With the relentless expansion of human economic activities,a substantial increase in CO_(2)emissions has been observed,primarily stemming from the rampant combustion of fossil fuels.This relentless surge has undeniably exacerbated global warming and climate change,necessitating urgent measures to mitigate greenhouse gas emissions[1].The conventional CO_(2)separation technologies required the addition of amine-based absorbents,while their applications were limited by the strong corrosivity,toxic volatiles and by-products,and energy-consuming regeneration process.Recent advancements in membrane technology,including polymer thin film composites,metal-organic frameworks,and stacked nanosheets,have exhibited promising CO_(2)/N_(2)separation performances[2,3].However,the challenge of balancing high selectivity with high permeance remains,due to the inherent limitation of reducing thickness of the selective layer below 50–100 nm without introducing detrimental defects.Porous single-layer graphene,with its atomically thin pores,emerges as a promising two-dimensional(2D)material that minimizes diffusion resistance for molecular transport[4].Nevertheless,balancing high selectivity with high permeance has remained a formidable challenge.展开更多
Membrane technology has thus far played an essential role in promoting environmental sustainability through improving the quality of water.Taking into account the current growth rate of membrane products along with th...Membrane technology has thus far played an essential role in promoting environmental sustainability through improving the quality of water.Taking into account the current growth rate of membrane products along with the market capacity,a tremendous rise in the amount of end-of-life(EoL)membranes is inevitable.In 2022,the global records of EoL membranes reached 35,000 tons.Recycling and resource utilization of EoL membranes is a viable option and hold significant promises for energy conservation and carbon neutralization.The present work provides an extensive overview of the latest progress in the field in relation with the prominent application cases.Furthermore,the avenues for the contributions of membrane recycling treatment technology within the framework of“carbon neutrality”are discussed with emphasis on permeability,pollutant interception capacity,and other relevant factors associated with the recycled membranes.This review strives to summarize the recycling and efficient utilization of EoL membranes,aiming at providing technical support to reduce operational costs and promote the low-carbon development of membrane technology.展开更多
The global energy market is in a transition towards low carbon fuel systems to ensure the sustainable development of our society and economy.This can be achieved by converting the surplus renewable energy into hydroge...The global energy market is in a transition towards low carbon fuel systems to ensure the sustainable development of our society and economy.This can be achieved by converting the surplus renewable energy into hydrogen gas.The injection of hydrogen(£10%v/v)in the existing natural gas pipelines is demonstrated to have negligible effects on the pipelines and is a promising solution for hydrogen transportation and storage if the enduser purification technologies for hydrogen recovery from hydrogen enriched natural gas(HENG)are in place.In this review,promising membrane technologies for hydrogen separation is revisited and presented.Dense metallic membranes are highlighted with the ability of producing 99.9999999%(v/v)purity hydrogen product.However,high operating temperature(≥300℃)incurs high energy penalty,thus,limits its application to hydrogen purification in the power to hydrogen roadmap.Polymeric membranes are a promising candidate for hydrogen separation with its commercial readiness.However,further investigation in the enhancement of H2/CH4 selectivity is crucial to improve the separation performance.The potential impacts of impurities in HENG on membrane performance are also discussed.The research and development outlook are presented,highlighting the essence of upscaling the membrane separation processes and the integration of membrane technology with pressure swing adsorption technology.展开更多
Membrane science and technology has been developed very fast in recent years in China.The Zhong Ke Membrane Re-search & Development Centre of Beijing(its predecessor is the Polymer Division of Research Centre for ...Membrane science and technology has been developed very fast in recent years in China.The Zhong Ke Membrane Re-search & Development Centre of Beijing(its predecessor is the Polymer Division of Research Centre for Eco-EnvironmentalSciences,Chinese Academy of Science)is one of the main institutions on membrane research and development,has been de-voted itself to the study and application of the membrane science and technology and has obtained great achievements since1975.More than ten kinds of polymers or their blend have been used for manufacturing ultrafiltration(UF)membranes withmolecular weight cut off from 3000 to 150000 dalton for plate membrane and from 6000-100000 dalton for hollow fiber展开更多
In the current social development of our country,environmental protection has become a key content,and water treatment process is a key step to achieve environmental protection.This paper analyzes the application of w...In the current social development of our country,environmental protection has become a key content,and water treatment process is a key step to achieve environmental protection.This paper analyzes the application of whole membrane water treatment technology in environmental protection.It is hoped that this analysis can be helpful for the rational application of the whole membrane water treatment technology and the improvement of environmental protection quality.展开更多
The rapid development of China's industrial economy makes the environmental engineering wastewater treatment pressure is huge. Compared with other sewage treatment technologies, membrane biological reaction techno...The rapid development of China's industrial economy makes the environmental engineering wastewater treatment pressure is huge. Compared with other sewage treatment technologies, membrane biological reaction technology has better treatment effect, and the effluent quality can be effectively guaranteed. In view of this, this paper mainly analyzes the basic concept of membrane biological reaction technology, and discusses its application in the field of environmental engineering wastewater treatment. Based on this, the space for improving the application of membrane biological reaction technology is also proposed.展开更多
Antimony(Sb)and its compounds,toxic metalloid,have been classified as high-priority pollutants.Increasing Sb released into the water environment by natural processes and anthropogenic activities,which exposure threate...Antimony(Sb)and its compounds,toxic metalloid,have been classified as high-priority pollutants.Increasing Sb released into the water environment by natural processes and anthropogenic activities,which exposure threatens to human health and ecosystems.Therefore,it is of unquestionable importance to remove Sb from polluted water.Keeping in view the extreme importance of this issue,we summarize the source,chemistry,speciation,distribution,toxicity,and polluted situation of Sb about aqueous solution.Then,we provide the recent and common technology to remove Sb,which are based on adsorption,coagulation/flocculation,electrochemical technology,membrane technology,ion exchange,etc.In this review,we focus in detail on the adsorption method,researchers at present have been investigating to discover more advanced,cost-effective,eco-friendly,reusable adsorbents.However,to date the Sb-containing wastewater treatment technologies are not sufficiently developed and most of research have been tested only in controlled lab conditions.Few reports are available that include field studies and applications.We critically analyzed the salient features and removal mechanisms,evaluating benefits and limitations of these technologies,hoping to provide more references for further research.Finally,we considered the Fe-or Mn-based technologies was the most promising technique to remove Sb for field application.展开更多
An anaerobic/oxic membrane bioreactor (A/O MBR) was used for treatment of dyeing wastewater from a woolen mill. COD and color of the wastewater were 54—473 mg/L and 40—400 dilution time (DT) respectively. The ratio ...An anaerobic/oxic membrane bioreactor (A/O MBR) was used for treatment of dyeing wastewater from a woolen mill. COD and color of the wastewater were 54—473 mg/L and 40—400 dilution time (DT) respectively. The ratio of BOD 5/COD was less than 0.13. By the A/O MBR process, the average removal of COD, BOD 5, color and turbidity was 82%, 96%, 71% and 99%, respectively. The average COD, BOD 5, color and turbidity of effluent was 37 mg/L, 0.8 mg/L, 40 DT and 0.44 NUT respectively. The effluent COD met the local standard of reuse water in Beijing, China. The average COD volume load of the anaerobic biological tank was 0.0483 kgCOD/(m 3·d) and that of the aeration tank of the MBR was 0.3589 kgCOD/(m 3·d). The sludge load of the MBR was 0.19 kgCOD/(kg·MLSS·d) on average and the maximum of that was 0.4 kgCOD/(kg·MLSS·d). The flux of the A/O membrane bioreactor could be remained at larger than 50 L/(h·m 2·0.1MPa). The results indicated that A/O membrane bioreactor has technical feasibility for treatment of woolen mill wastewater.展开更多
The efficiency of membrane separation technology for wastewater treatment was employed to check its efficiency in removing pharmaceuticals, their degradation products and their metabolites from wastewater. Aspirin and...The efficiency of membrane separation technology for wastewater treatment was employed to check its efficiency in removing pharmaceuticals, their degradation products and their metabolites from wastewater. Aspirin and paracetamol were found to degrade in wastewater furnishing salicylic acid and p-aminophenol, respectively. The kinetics for the degradation reactions of both drugs were investigated in wastewater environment and both have shown first order kinetics with rate constants 0.845 × 10^-8 Ms^-1 and 1.0 × 10^-8 Ms^-1 at room temperature, respectively. These values are an order of magnitude larger than those obtained in pure water under the same conditions. The over all performance of the plant has shown complete removal of these compounds from spiked wastewater within the detection limit of the analytical method. The most effective components for removing those drugs within the plant were activated carbon and clay micelle filters. The adsorption isotherms for these compounds have been studied using both activated carbon and newly developed adsober named clay-micelle complex. All studied isotherms were found to fit Langmuir isotherm. The Langmuir constant and the adsorption capacity were evaluated and discussed.展开更多
To lower the costs of wastewater treatment, the submerged hollow fiber ultrafiltration membrane was employed to reuse the filter backwash water and settling tank sludge water. Experimental study indicates that the sub...To lower the costs of wastewater treatment, the submerged hollow fiber ultrafiltration membrane was employed to reuse the filter backwash water and settling tank sludge water. Experimental study indicates that the submerged hollow fiber uhrafihration membrane can condense the concentration of sludge from 0. 1% -0. 3% to 2.5%. At 20 ℃, the system can operate continuously for 80 clays with daily online backwashing with chemical additions only once, and the membrane flux can be recovered up to 97% by using NaClO and NaOH as chemical additions. The results show that the membrane flux is mainly affected by temperature,and has a positive lin- ear relation to temperature with a slope of 0. 368. After treated by submerged hollow fiber uhrafihration membrane, the effluent can reach the National Standard for Drinking Water（ GB5749 -85 ） , especially for the sludge water from sedimentation tanks and the backwashing Water from filters in water supply plants.展开更多
Membrane separation technology has been taken up for use in diverse applications such as water treatment,pharmaceutical,petroleum,and energy-related industries.Compared with the design of membrane materials,the innova...Membrane separation technology has been taken up for use in diverse applications such as water treatment,pharmaceutical,petroleum,and energy-related industries.Compared with the design of membrane materials,the innovation of membrane preparation technique is more urgent for the development of membrane separation technology,because it not only affects physicochemical properties and separation performance of the fabricated membranes,but also determines their potential in industrialized application.Among the various membrane preparation methods,spray technique has recently gained increasing attention because of its low cost,rapidity,scalability,minimum of environmental burden,and viability for nearly unlimited range of materials.In this Review article,we summarized and discussed the recent developments in separation membranes using the spray technique,including the fundamentals,important features and applications.The present challenges and future considerations have been touched to provide inspired insights for developing the sprayed separation membranes.展开更多
To enhance the performance of the polyphenylene sulfone(PPSU) membrane,a novel mixed matrix membrane with hydrophilicity and antifouling properties was prepared.Using PPSU as the ba sic membrane material,polyvinyl pyr...To enhance the performance of the polyphenylene sulfone(PPSU) membrane,a novel mixed matrix membrane with hydrophilicity and antifouling properties was prepared.Using PPSU as the ba sic membrane material,polyvinyl pyrrolidone(PVP) as the porogen,N-Methyl pyrrolidone(NMP) as the solvent,and MOF-CAU-1(Al_(4)(OH)_(2)(OCH_(3))_4(H_2 N-BDC)_(3)·xH_(2) O) as the filler,PPSU/CAU-1 mixed matrix membrane(MMM) was prepared by an immersion precipitation and phase transformation technique.By changing the amount of MOF-CAU-1,the properties and performance of the MMM membrane were investigated in terms of hydrophilicity,pore morphology,surface roughness,and dye removal.The results show that the highest pure water flux of the mixed reached 47.9 L·m^(-2)·h^(-1), when the CAU-1 addition amount was 1.0 wt%, which was 23% higher than that of the pure PPSU membrane.Both the rejection rate and the antifouling performance of the MMM membrane also noticeably improved.展开更多
The field of membrane science and technology has been one of the most trending research topics in the last few decades,owing to the large number of membrane-based applications and the expected contribution of membrane...The field of membrane science and technology has been one of the most trending research topics in the last few decades,owing to the large number of membrane-based applications and the expected contribution of membrane technology in areas such as water security,environmental wellbeing,and energy storage.Due to extensive research,membrane preparation techniques are divided into a wide range of classifications,largely depending on the materials involved,the preparation techniques,and the implemented applications.Most effective and high-performing membranes are modified or fabricated from polymeric-based materials with polymer backbone structures.Therefore,the structure and effectiveness of the polymeric materials depend on the preparation method,which influences the final polymer features.Several polymeric membrane materials may need to be chemically modified by using polymerization techniques.Thus,we noticed a clear gap in documenting the commonly used polymerization methods that yield high-performance polymeric membranes for several applications.By correlating between the preparation/modification technique and application aspects,this review article uniquely covers the membrane material preparation through polymerization methods,starting from the traditional polymerization methods up to the nontraditional living free-radical polymerization methods such as RAFT,ATRP,etc.The review also discusses other classes of polymerization,such as interfacial polymerization and click chemistry reactions.Highlighting core issues such as polymerization techniques is important in order to further understand the membrane’s related polymerization chemistry,linking between the polymeric modifier preparation techniques and their influence on performance aspects.Moreover,the review also aims to provide a solid understanding of membrane preparation chemistry in order to push membrane technology further and overcome some of the milestone problems in this field.展开更多
基金financial support from SATREPS project(vote number:R.J130000.7801.4L977)KPM-UTM Grant(vote number:R.J130000.7301.4L997).
文摘The treatment of POME related contamination is complicated due to its high organic contents and complex composition.Membrane technology is a prominent method for removing POME contaminants on account of its efficiency in removing suspended particles,organic substances,and contaminants from wastewater,leading to the production of high-quality treated effluent.It is crucial to achieve efficient POME treatment with minimum fouling through membrane advancement to ensure the sustainability for large-scale applications.This article comprehensively analyses the latest advancements in membrane technology for the treatment of POME.A wide range of membrane types including forward osmosis,microfiltration,ultrafiltration,nanofiltration,reverse osmosis,membrane bioreactor,photocatalytic membrane reactor,and their combinations is discussed in terms of the innovative design,treatment efficiencies and antifouling properties.The strategies for antifouling membranes such as self-healing and self-cleaning membranes are discussed.In addition to discussing the obstacles that impede the broad implementation of novel membrane tech nologies in POME treatment,the article concludes by delineating potential avenues for future research and policy considerations.The understanding and insights are expected to enhance the application ofmembrane-basedmethods in order to treat POME more efficiently;this will be instrumental in the reduction of environmental pollution.
基金supported by the Ministry of Higher Education Malaysia through Long Term Research Grant Scheme (A/C Number 2110226-113-00)
文摘Membrane technology is becoming more important for CO,_ separation from natural gas in the new era due to its process simplicity, relative ease of operation and control, compact, and easy to scale up as compared with conventional processes. Conventional processes such as absorption and adsorption for CO2 separation from natural gas are generally more energy demanding and costly for both operation and maintenance. Polymeric membranes are the current commercial membranes used for CO2 separation from natural gas. However, polymeric membranes possess drawbacks such as low permeability and selectivity, plasticization at high temperatures, as well as insufficient thermal and chemical stability. The shortcomings of commercial polymeric membranes have motivated researchers to opt for other alternatives, especially inorganic membranes due to their higher thermal stability, good chemical resistance to solvents, high mechanical strength and long lifetime. Surface modifications can be utilized in inorganic membranes to further enhance the selectivity, permeability or catalytic activities of the membrane. This paper is to provide a comprehensive review on gas separation, comparing membrane technology with other conventional methods of recovering CO2 from natural gas, challenges of current commercial polymeric membranes and inorganic membranes for CO2 removal and membrane surface modification for improved selectivity.
文摘Palm oil industry is the most important agro-industry in Malaysia, but its by-product-palm oil mill effluent （POME）, posed a great threat to water environment. In the past decades, several treatment and disposal methods have been proposed and investigated to solve this problem. A two-stage pilot-scale plant was designed and constructed for POME treatment. Anaerobic digestion and aerobic biodegradation constituted the first biological stage, while ultrafiltration （UF） and reverse osmosis （RO） membrane units were combined as the second membrane separation stage. In the anaerobic expanded granular sludge bed （EGSB） reactor, about 43% organic matter in POME was converted into biogas, and COD reduction efficiency reached 93% and 22% in EGSB and the following aerobic reactor, respectively. With the treatment in the first biological stage, suspended solids and oil also decreased to a low degree. All these alleviated the membrane fouling and prolonged the membrane life. In the membrane process unit, almost all the suspended solids were captured by UF membranes, while RO membrane excluded most of the dissolved solids or inorganic salts from RO permeate. After the whole treatment processes, organic matter in POME expressed by BOD and COD was removed almost thoroughly. Suspended solids and color were not detectable in RO permeate any more, and mineral elements only existed in trace amount （except for K and Na）. The high-quality effluent was crystal clear and could be used as the boiler feed water.
文摘In the process of ecological environment construction in China, the construction and implementation of environmental protection projects are of great significance. The wide application of water treatment technology can gradually alleviate the problem of shortage of freshwater resources and achieve sustainable development and protection of water resources. The article firstly introduces several ultrafiltration membrane technologies commonly used in environmental engineering water treatment;then expounds the advantages of ultrafiltration membrane technology;finally, discusses the practical application of ultrafiltration membrane technology, in order to provide theoretical and practical basis for related research.
文摘With the acceleration of the urbanization process, the demand for domestic water and industrial water is increasing. Strengthening the development and protection of water resources is the only way to implement the concept of green sustainable development. The water resources treatment process is affected by various factors. Ultrafiltration membrane technology improves the utilization rate of water resources, reduces energy consumption, and reduces the damage to the environment. It is widely used in the water treatment field of environmental protection projects, and is an important technical road to realize the sustainable development of water resources.
文摘With the rapid development of society, water environmental pollution is becoming more and more serious. Industrial wastewater pollution is an important aspect. Under the guidance of environmental protection standards and policies, departments and research units are continuously increasing research and development of industrial water pollution treatment technologies, aiming at continuously researching new processes, technologies and equipment on the basis of the original conventional wastewater treatment processes, and more applying them to industrial wastewater treatment. Among them, membrane treatment process and technology are more and more applied to various industrial wastewater treatment projects. The process of separating media through selective membrane is the process of membrane separation technology. In this process, the separation, purification and concentration of the mixture need to be achieved through external force. In the process of membrane technology being fully applied to the purification and treatment of industrial wastewater, the value of membrane technology can be better exerted, the pollution of industrial wastewater to the water environment can be minimized, and the development of social and ecological civilization can be promoted.
基金sponsored by the National Natural Science Foundation of China(Grant Number:21978175)
文摘As a highly complex aqueous effluent, tannery wastewater from leather industry should be treated appropriately before discharging into the environment. Membrane technology has been shown to be a promising approach for tannery wastewater treatment as it may achieve “Zero Liquid Discharge(ZLD)”. This work, as the state-of-the-art, attempts to review the world-wide research trends of membrane technologies, the technical recapitulation and recent advances of such technology for tannery wastewater treatment. Generally, manufacture membrane, membrane-based integrated process, MBR, NF, UF and RO are the hotspots in this field. Details of different membrane technologies configured for tannery wastewater treatment, such as membrane materials, scale, membrane modules, operating conditions and removal efficiency of pollutants, are also summarized. It should be noted that membrane fouling is still a major challenge in the membrane technology during tannery wastewater treatment. Therefore, process coupling, either within diverse membrane technologies or between membrane and non-membrane technologies, is considered as a promising alternative to treat the leather tannery wastewater in the future.
基金supported by the National Natural Science Foundation of China(22122602,22376071,22161142005)the Foundation of State Key Laboratory of Coal Combustion,China.
文摘With the relentless expansion of human economic activities,a substantial increase in CO_(2)emissions has been observed,primarily stemming from the rampant combustion of fossil fuels.This relentless surge has undeniably exacerbated global warming and climate change,necessitating urgent measures to mitigate greenhouse gas emissions[1].The conventional CO_(2)separation technologies required the addition of amine-based absorbents,while their applications were limited by the strong corrosivity,toxic volatiles and by-products,and energy-consuming regeneration process.Recent advancements in membrane technology,including polymer thin film composites,metal-organic frameworks,and stacked nanosheets,have exhibited promising CO_(2)/N_(2)separation performances[2,3].However,the challenge of balancing high selectivity with high permeance remains,due to the inherent limitation of reducing thickness of the selective layer below 50–100 nm without introducing detrimental defects.Porous single-layer graphene,with its atomically thin pores,emerges as a promising two-dimensional(2D)material that minimizes diffusion resistance for molecular transport[4].Nevertheless,balancing high selectivity with high permeance has remained a formidable challenge.
基金supported by the National Natural Science Foundation of China(Nos.52322001,52070183,and 52330001)the National Key R&D Program of China(No.2023YFE0113800)the Excellent Member of the Youth Innovation Promotion Association,Chinese Academy of Sciences(No.Y2023010).
文摘Membrane technology has thus far played an essential role in promoting environmental sustainability through improving the quality of water.Taking into account the current growth rate of membrane products along with the market capacity,a tremendous rise in the amount of end-of-life(EoL)membranes is inevitable.In 2022,the global records of EoL membranes reached 35,000 tons.Recycling and resource utilization of EoL membranes is a viable option and hold significant promises for energy conservation and carbon neutralization.The present work provides an extensive overview of the latest progress in the field in relation with the prominent application cases.Furthermore,the avenues for the contributions of membrane recycling treatment technology within the framework of“carbon neutrality”are discussed with emphasis on permeability,pollutant interception capacity,and other relevant factors associated with the recycled membranes.This review strives to summarize the recycling and efficient utilization of EoL membranes,aiming at providing technical support to reduce operational costs and promote the low-carbon development of membrane technology.
基金the support of Early Career Researcher Grants Scheme awarded by the University of Melbourne entitled‘Production of High Purity Hydrogen from Mixed Pipeline Gases’Future Fuel Cooperative Research Centre(CRC)‘Novel Separation Technology development for hydrogen and future fuels systems’.
文摘The global energy market is in a transition towards low carbon fuel systems to ensure the sustainable development of our society and economy.This can be achieved by converting the surplus renewable energy into hydrogen gas.The injection of hydrogen(£10%v/v)in the existing natural gas pipelines is demonstrated to have negligible effects on the pipelines and is a promising solution for hydrogen transportation and storage if the enduser purification technologies for hydrogen recovery from hydrogen enriched natural gas(HENG)are in place.In this review,promising membrane technologies for hydrogen separation is revisited and presented.Dense metallic membranes are highlighted with the ability of producing 99.9999999%(v/v)purity hydrogen product.However,high operating temperature(≥300℃)incurs high energy penalty,thus,limits its application to hydrogen purification in the power to hydrogen roadmap.Polymeric membranes are a promising candidate for hydrogen separation with its commercial readiness.However,further investigation in the enhancement of H2/CH4 selectivity is crucial to improve the separation performance.The potential impacts of impurities in HENG on membrane performance are also discussed.The research and development outlook are presented,highlighting the essence of upscaling the membrane separation processes and the integration of membrane technology with pressure swing adsorption technology.
文摘Membrane science and technology has been developed very fast in recent years in China.The Zhong Ke Membrane Re-search & Development Centre of Beijing(its predecessor is the Polymer Division of Research Centre for Eco-EnvironmentalSciences,Chinese Academy of Science)is one of the main institutions on membrane research and development,has been de-voted itself to the study and application of the membrane science and technology and has obtained great achievements since1975.More than ten kinds of polymers or their blend have been used for manufacturing ultrafiltration(UF)membranes withmolecular weight cut off from 3000 to 150000 dalton for plate membrane and from 6000-100000 dalton for hollow fiber
文摘In the current social development of our country,environmental protection has become a key content,and water treatment process is a key step to achieve environmental protection.This paper analyzes the application of whole membrane water treatment technology in environmental protection.It is hoped that this analysis can be helpful for the rational application of the whole membrane water treatment technology and the improvement of environmental protection quality.
文摘The rapid development of China's industrial economy makes the environmental engineering wastewater treatment pressure is huge. Compared with other sewage treatment technologies, membrane biological reaction technology has better treatment effect, and the effluent quality can be effectively guaranteed. In view of this, this paper mainly analyzes the basic concept of membrane biological reaction technology, and discusses its application in the field of environmental engineering wastewater treatment. Based on this, the space for improving the application of membrane biological reaction technology is also proposed.
基金supported by National Natural Science Foundation of China(21677014),China
文摘Antimony(Sb)and its compounds,toxic metalloid,have been classified as high-priority pollutants.Increasing Sb released into the water environment by natural processes and anthropogenic activities,which exposure threatens to human health and ecosystems.Therefore,it is of unquestionable importance to remove Sb from polluted water.Keeping in view the extreme importance of this issue,we summarize the source,chemistry,speciation,distribution,toxicity,and polluted situation of Sb about aqueous solution.Then,we provide the recent and common technology to remove Sb,which are based on adsorption,coagulation/flocculation,electrochemical technology,membrane technology,ion exchange,etc.In this review,we focus in detail on the adsorption method,researchers at present have been investigating to discover more advanced,cost-effective,eco-friendly,reusable adsorbents.However,to date the Sb-containing wastewater treatment technologies are not sufficiently developed and most of research have been tested only in controlled lab conditions.Few reports are available that include field studies and applications.We critically analyzed the salient features and removal mechanisms,evaluating benefits and limitations of these technologies,hoping to provide more references for further research.Finally,we considered the Fe-or Mn-based technologies was the most promising technique to remove Sb for field application.
文摘An anaerobic/oxic membrane bioreactor (A/O MBR) was used for treatment of dyeing wastewater from a woolen mill. COD and color of the wastewater were 54—473 mg/L and 40—400 dilution time (DT) respectively. The ratio of BOD 5/COD was less than 0.13. By the A/O MBR process, the average removal of COD, BOD 5, color and turbidity was 82%, 96%, 71% and 99%, respectively. The average COD, BOD 5, color and turbidity of effluent was 37 mg/L, 0.8 mg/L, 40 DT and 0.44 NUT respectively. The effluent COD met the local standard of reuse water in Beijing, China. The average COD volume load of the anaerobic biological tank was 0.0483 kgCOD/(m 3·d) and that of the aeration tank of the MBR was 0.3589 kgCOD/(m 3·d). The sludge load of the MBR was 0.19 kgCOD/(kg·MLSS·d) on average and the maximum of that was 0.4 kgCOD/(kg·MLSS·d). The flux of the A/O membrane bioreactor could be remained at larger than 50 L/(h·m 2·0.1MPa). The results indicated that A/O membrane bioreactor has technical feasibility for treatment of woolen mill wastewater.
文摘The efficiency of membrane separation technology for wastewater treatment was employed to check its efficiency in removing pharmaceuticals, their degradation products and their metabolites from wastewater. Aspirin and paracetamol were found to degrade in wastewater furnishing salicylic acid and p-aminophenol, respectively. The kinetics for the degradation reactions of both drugs were investigated in wastewater environment and both have shown first order kinetics with rate constants 0.845 × 10^-8 Ms^-1 and 1.0 × 10^-8 Ms^-1 at room temperature, respectively. These values are an order of magnitude larger than those obtained in pure water under the same conditions. The over all performance of the plant has shown complete removal of these compounds from spiked wastewater within the detection limit of the analytical method. The most effective components for removing those drugs within the plant were activated carbon and clay micelle filters. The adsorption isotherms for these compounds have been studied using both activated carbon and newly developed adsober named clay-micelle complex. All studied isotherms were found to fit Langmuir isotherm. The Langmuir constant and the adsorption capacity were evaluated and discussed.
基金the National High Technology Research and Development Program of China(Grant No.2004AA601020)
文摘To lower the costs of wastewater treatment, the submerged hollow fiber ultrafiltration membrane was employed to reuse the filter backwash water and settling tank sludge water. Experimental study indicates that the submerged hollow fiber uhrafihration membrane can condense the concentration of sludge from 0. 1% -0. 3% to 2.5%. At 20 ℃, the system can operate continuously for 80 clays with daily online backwashing with chemical additions only once, and the membrane flux can be recovered up to 97% by using NaClO and NaOH as chemical additions. The results show that the membrane flux is mainly affected by temperature,and has a positive lin- ear relation to temperature with a slope of 0. 368. After treated by submerged hollow fiber uhrafihration membrane, the effluent can reach the National Standard for Drinking Water（ GB5749 -85 ） , especially for the sludge water from sedimentation tanks and the backwashing Water from filters in water supply plants.
基金supported by the National Key Research and Development Program of China(2021YF B3802600)National Key Research and Development Project of China(2018YFE0203500)the Natural Science Foundation of Jiangsu Province(BK20190603).
文摘Membrane separation technology has been taken up for use in diverse applications such as water treatment,pharmaceutical,petroleum,and energy-related industries.Compared with the design of membrane materials,the innovation of membrane preparation technique is more urgent for the development of membrane separation technology,because it not only affects physicochemical properties and separation performance of the fabricated membranes,but also determines their potential in industrialized application.Among the various membrane preparation methods,spray technique has recently gained increasing attention because of its low cost,rapidity,scalability,minimum of environmental burden,and viability for nearly unlimited range of materials.In this Review article,we summarized and discussed the recent developments in separation membranes using the spray technique,including the fundamentals,important features and applications.The present challenges and future considerations have been touched to provide inspired insights for developing the sprayed separation membranes.
基金supported by Key Research and Development of Tangshan (19140204F)。
文摘To enhance the performance of the polyphenylene sulfone(PPSU) membrane,a novel mixed matrix membrane with hydrophilicity and antifouling properties was prepared.Using PPSU as the ba sic membrane material,polyvinyl pyrrolidone(PVP) as the porogen,N-Methyl pyrrolidone(NMP) as the solvent,and MOF-CAU-1(Al_(4)(OH)_(2)(OCH_(3))_4(H_2 N-BDC)_(3)·xH_(2) O) as the filler,PPSU/CAU-1 mixed matrix membrane(MMM) was prepared by an immersion precipitation and phase transformation technique.By changing the amount of MOF-CAU-1,the properties and performance of the MMM membrane were investigated in terms of hydrophilicity,pore morphology,surface roughness,and dye removal.The results show that the highest pure water flux of the mixed reached 47.9 L·m^(-2)·h^(-1), when the CAU-1 addition amount was 1.0 wt%, which was 23% higher than that of the pure PPSU membrane.Both the rejection rate and the antifouling performance of the MMM membrane also noticeably improved.
基金supported by the National Natural Science Foundation of China(52073133)Key Talent Project Foundation of Gansu Province,Joint fund between Shenyang National Laboratory for Materials Science and State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals(18LHPY002)the Program for Hongliu Distinguished Young Scholars in Lanzhou University of Technology.
文摘The field of membrane science and technology has been one of the most trending research topics in the last few decades,owing to the large number of membrane-based applications and the expected contribution of membrane technology in areas such as water security,environmental wellbeing,and energy storage.Due to extensive research,membrane preparation techniques are divided into a wide range of classifications,largely depending on the materials involved,the preparation techniques,and the implemented applications.Most effective and high-performing membranes are modified or fabricated from polymeric-based materials with polymer backbone structures.Therefore,the structure and effectiveness of the polymeric materials depend on the preparation method,which influences the final polymer features.Several polymeric membrane materials may need to be chemically modified by using polymerization techniques.Thus,we noticed a clear gap in documenting the commonly used polymerization methods that yield high-performance polymeric membranes for several applications.By correlating between the preparation/modification technique and application aspects,this review article uniquely covers the membrane material preparation through polymerization methods,starting from the traditional polymerization methods up to the nontraditional living free-radical polymerization methods such as RAFT,ATRP,etc.The review also discusses other classes of polymerization,such as interfacial polymerization and click chemistry reactions.Highlighting core issues such as polymerization techniques is important in order to further understand the membrane’s related polymerization chemistry,linking between the polymeric modifier preparation techniques and their influence on performance aspects.Moreover,the review also aims to provide a solid understanding of membrane preparation chemistry in order to push membrane technology further and overcome some of the milestone problems in this field.
