The petrochemical industry,one of the fastest-growing sectors,is projected to continue expanding in the coming years.As environmental regulations tighten and demand for cleaner production increases,the petrochemical i...The petrochemical industry,one of the fastest-growing sectors,is projected to continue expanding in the coming years.As environmental regulations tighten and demand for cleaner production increases,the petrochemical industry is compelled to adopt environmentally sustainable technologies and advanced wastewater treatment solutions.Petrochemical wastewater contains a range of pollutants,including petroleum hydrocarbons,emulsified oils,phenols,ammonia,sulfides,and other organic compounds.These contaminants often occur in complex physicochemical forms at discharge,posing significant environmental risks.Conventional biological and physicochemical treatments frequently fail to meet stringent discharge standards because of limited resilience to load fluctuations,restricted biodegradability,and secondary sludge generation.Advanced treatment has therefore become essential for petrochemical wastewater management.Among available options,adsorption,membrane separations,and advanced oxidation processes stand out for their performance.Adsorption excels at removing heavy metals and recalcitrant organics owing to diverse sorbent chemistries and operational simplicity.Membrane technologies achieve molecular-level selectivity with high water recovery potential.Catalytic ozonation effectively mineralizes refractory pollutants and enhances subsequent biodegradability.Current research highlights innovations in graphene-based adsorbents,ceramic nanofiltration membranes,and multifunctional catalysts that improve treatment efficiency,stability,and reusability.This review synthesizes recent advances in the deep treatment of petrochemical wastewater,outlines research priorities for evaluating the effectiveness of these technologies in oil-based wastewater management,and provides reference for research and application in this field.展开更多
We report the catalytic properties of ultra-small β-FeOOH nanorods in ozonation of4-chlorophenol（4-CP）. XRD, TEM, EDS, SAED, FTIR and BET were used to characterize the prepared material. Interaction between O3 and ...We report the catalytic properties of ultra-small β-FeOOH nanorods in ozonation of4-chlorophenol（4-CP）. XRD, TEM, EDS, SAED, FTIR and BET were used to characterize the prepared material. Interaction between O3 and β-FeOOH was evident from the FTIR spectra.The removal efficiency of 4-CP was significantly enhanced in the presence of β-FeOOH compared to ozone alone. Removal efficiency of 99% and 67% was achieved after 40 min in the presence of combined ozone and catalyst and ozone only, respectively. Increasing catalyst load increased COD removal efficiency. Maximum COD removal of 97% was achieved using a catalyst load of 0.1 g/100 m L of 4-CP solution. Initial 4-CP concentration was not found to be rate limiting below 2 × 10^-3mol/L. The catalytic properties of the material during ozonation process were found to be pronounced at lower initial p H of 3.5.Two stage first order kinetics was applied to describe the kinetic behavior of the nanorods at low p H. The first stage of catalytic ozonation was attributed to the heterogeneous surface breakdown of O3 by β-FeOOH, while the second stage was attributed to homogeneous catalysis initiated by reductive dissolution of β-FeOOH at low p H.展开更多
In this work, a novel catalyst of Fe_3O_4@SiO_2@Yb_2O_3 was prepared and the degradation of thymol in reverse osmosis concentrate using ozonation was explored. The operational parameters, such as ozone dosage(8–48 mg...In this work, a novel catalyst of Fe_3O_4@SiO_2@Yb_2O_3 was prepared and the degradation of thymol in reverse osmosis concentrate using ozonation was explored. The operational parameters, such as ozone dosage(8–48 mg·min^(-1)),initial thymol concentration(20–100 mg·L^(-1)), initial pH value(3–11), and catalyst Fe_3O_4@SiO_2@Yb_2O_3dosage(0.2–1.0 g), were studied focusing on the thymol degradation and COD removal. The results indicated that the increase in ozone dosage, initial p H value, and Fe_3O_4@SiO_2@Yb_2O_3dosage accelerated the thymol degradation and COD removal, while the increase in initial thymol concentration hampered the effect of ozonation. A pathway of thymol degradation by catalytic ozonation was proposed based on the intermediates detected by gas chromatography-mass spectrometer and ion chromatography. This paper can provide basic data and technical alternative for pollutant removal from reverse osmosis concentrate by ozonation.展开更多
基金supported by the National Natural Science Foundation of China(22172068)the International Industrial Technology Research and Development Project of Liaoning Province(2025JH2/101900006)the Science and Technology Innovation Teams of the Talent Revi-talization Program of Liaoning Province(XLYC2404022).
文摘The petrochemical industry,one of the fastest-growing sectors,is projected to continue expanding in the coming years.As environmental regulations tighten and demand for cleaner production increases,the petrochemical industry is compelled to adopt environmentally sustainable technologies and advanced wastewater treatment solutions.Petrochemical wastewater contains a range of pollutants,including petroleum hydrocarbons,emulsified oils,phenols,ammonia,sulfides,and other organic compounds.These contaminants often occur in complex physicochemical forms at discharge,posing significant environmental risks.Conventional biological and physicochemical treatments frequently fail to meet stringent discharge standards because of limited resilience to load fluctuations,restricted biodegradability,and secondary sludge generation.Advanced treatment has therefore become essential for petrochemical wastewater management.Among available options,adsorption,membrane separations,and advanced oxidation processes stand out for their performance.Adsorption excels at removing heavy metals and recalcitrant organics owing to diverse sorbent chemistries and operational simplicity.Membrane technologies achieve molecular-level selectivity with high water recovery potential.Catalytic ozonation effectively mineralizes refractory pollutants and enhances subsequent biodegradability.Current research highlights innovations in graphene-based adsorbents,ceramic nanofiltration membranes,and multifunctional catalysts that improve treatment efficiency,stability,and reusability.This review synthesizes recent advances in the deep treatment of petrochemical wastewater,outlines research priorities for evaluating the effectiveness of these technologies in oil-based wastewater management,and provides reference for research and application in this field.
基金supported by the National Research Foundation of South Africa (No: 88220)the Cape Peninsula University of Technology (University Research Funding) (URF:2014)
文摘We report the catalytic properties of ultra-small β-FeOOH nanorods in ozonation of4-chlorophenol（4-CP）. XRD, TEM, EDS, SAED, FTIR and BET were used to characterize the prepared material. Interaction between O3 and β-FeOOH was evident from the FTIR spectra.The removal efficiency of 4-CP was significantly enhanced in the presence of β-FeOOH compared to ozone alone. Removal efficiency of 99% and 67% was achieved after 40 min in the presence of combined ozone and catalyst and ozone only, respectively. Increasing catalyst load increased COD removal efficiency. Maximum COD removal of 97% was achieved using a catalyst load of 0.1 g/100 m L of 4-CP solution. Initial 4-CP concentration was not found to be rate limiting below 2 × 10^-3mol/L. The catalytic properties of the material during ozonation process were found to be pronounced at lower initial p H of 3.5.Two stage first order kinetics was applied to describe the kinetic behavior of the nanorods at low p H. The first stage of catalytic ozonation was attributed to the heterogeneous surface breakdown of O3 by β-FeOOH, while the second stage was attributed to homogeneous catalysis initiated by reductive dissolution of β-FeOOH at low p H.
基金Supported by the National Natural Science Foundation of China(51138008,51478314,51308391)the Key Project for Research and Development(2016YFC0400503)+1 种基金the Tianjin Science and Technology Program(14ZCDGSF00128)the Natural Science Foundation of Tianjin(14JCQNJC09000)
文摘In this work, a novel catalyst of Fe_3O_4@SiO_2@Yb_2O_3 was prepared and the degradation of thymol in reverse osmosis concentrate using ozonation was explored. The operational parameters, such as ozone dosage(8–48 mg·min^(-1)),initial thymol concentration(20–100 mg·L^(-1)), initial pH value(3–11), and catalyst Fe_3O_4@SiO_2@Yb_2O_3dosage(0.2–1.0 g), were studied focusing on the thymol degradation and COD removal. The results indicated that the increase in ozone dosage, initial p H value, and Fe_3O_4@SiO_2@Yb_2O_3dosage accelerated the thymol degradation and COD removal, while the increase in initial thymol concentration hampered the effect of ozonation. A pathway of thymol degradation by catalytic ozonation was proposed based on the intermediates detected by gas chromatography-mass spectrometer and ion chromatography. This paper can provide basic data and technical alternative for pollutant removal from reverse osmosis concentrate by ozonation.
