Negatively thermo-responsive 2D membranes,which mimic the stomatal opening/closing of plants,have drawn substantial interest for tunable molecular separation processes.However,these membranes are still restricted sign...Negatively thermo-responsive 2D membranes,which mimic the stomatal opening/closing of plants,have drawn substantial interest for tunable molecular separation processes.However,these membranes are still restricted significantly on account of low water permeability and poor dynamic tunability of 2D nanochannels under temperature stimulation.Here,we present a biomimetic negatively thermo-responsive MXene membrane by covalently grafting poly(N-isopropylacrylamide)(PNIPAm)onto MXene nanosheets.The uniformly grafted PNIPAm polymer chains can enlarge the interlayer spacings for increasing water permeability while also allowing more tunability of 2D nanochannels for enhancing the capability of gradually separating multiple molecules of different sizes.As expected,the constructed membrane exhibits ultrahigh water permeance of 95.6 L m^(-2) h^(-1) bar^(-1) at 25℃,which is eight-fold higher than the state-of-the-art negatively thermoresponsive 2D membranes.Moreover,the highly temperature-tunable 2D nanochannels enable the constructed membrane to perform excellent graded molecular sieving for dye-and antibiotic-based ternary mixtures.This strategy provides new perspectives in engineering smart 2D membrane and expands the scope of temperature-responsive membranes,showing promising applications in micro/nanofluidics and molecular separation.展开更多
As an important part of urban infrastructure,urban water system is of great and far-reaching significance for ensuring urban flood control and waterlogging safety,protecting ecological environment and building livable...As an important part of urban infrastructure,urban water system is of great and far-reaching significance for ensuring urban flood control and waterlogging safety,protecting ecological environment and building livable homes.Taking the urban water system of Nantong as an example,Nantong Water Resources Bureau issued R evision of Nantong Urban Water System Planning in 2017,and put forward the construction of the"two circles,eight lakes and nine veins"water system layout,giving new vitality to the urban water system.In view of problems existing in newly excavated artificial landscape lakes,such as fragile water ecosystem,strong eutrophication trend,poor environmental sensory effect and unsatisfactory water landscape effect,it is urgent to study the in-situ water ecological restoration technique of"algae-controlling zooplankton+submerged plant community"to build a"grass-type clear water"ecosystem for artificial landscape lakes,so as to improve the water sensory index and self-purification ability and finally realize the double improvement of"sensory effect and water quality"of artificial landscape lakes.展开更多
Based on the questionnaire survey of 337 farmers in 8 villages in Rugao City,Jiangsu Province,the gender,age and educational level of the main able-bodied people of farm households,the characteristics of farmers’prod...Based on the questionnaire survey of 337 farmers in 8 villages in Rugao City,Jiangsu Province,the gender,age and educational level of the main able-bodied people of farm households,the characteristics of farmers’production and living behaviors,farmers’cognition of rural non-point source pollution,and farmers’willingness to pay for rural non-point source pollution control and its influencing factors were studied.The results show that to protect the rural ecological environment,most farmers are willing to participate in rural non-point source pollution control,but the annual cost of rural non-point source pollution control is low,and the number of volunteer days is small.Rural grass-roots party organizations should stimulate farmers’willingness to participate in rural non-point source pollution control,give full play to the role of the branch as a fighting fortress,and build a mechanism for Party building to lead rural non-point source pollution control.展开更多
In view of the problems found in the in-depth interviews of the current situation of rural non-point source pollution control mechanism in Nantong City and their reasons,the following six countermeasures and suggestio...In view of the problems found in the in-depth interviews of the current situation of rural non-point source pollution control mechanism in Nantong City and their reasons,the following six countermeasures and suggestions are put forward,including giving full play to the role of fighting bastion of the Party branch and building a mechanism for Party building to lead the control of non-point source pollution in rural areas,giving prominence to the dominant role of farmers and establishing farmers’endogenous motivation excitation mechanism for rural non-point source pollution control,improving the interest coordination mechanism among multiple governance subjects and building a modern control system for rural non-point source pollution,combining regulations,administrative,economic,technical and other means of rural non-point source pollution control and strengthening the synergistic integration mechanism of multiple means of control,reconstructing the information disclosure mechanism of rural non-point source pollution control and building a comprehensive trust mechanism of multiple control subjects,and improving the mechanism for coordinating the supply of policy tools and ensure that basic mechanisms play their due role.展开更多
Aiming at the problems of water pollution and ecological environment degradation in urban artificial landscape lakes,the ecological restoration technologies of artificial landscape lakes at home and abroad were studie...Aiming at the problems of water pollution and ecological environment degradation in urban artificial landscape lakes,the ecological restoration technologies of artificial landscape lakes at home and abroad were studied to provide some reference for the ecological restoration of urban artificial landscape lakes in China.展开更多
g-C3N4/PPy/Ag ternary photocatalyst was synthesized by a three-step method. Firstly, graphitic carbon nitride （g-C3N4） photocatalyst was obtained by sintering melamine at high temperature, then a series ofg-C3N4/PPy...g-C3N4/PPy/Ag ternary photocatalyst was synthesized by a three-step method. Firstly, graphitic carbon nitride （g-C3N4） photocatalyst was obtained by sintering melamine at high temperature, then a series ofg-C3N4/PPy com- posite photocatalysts were prepared by in-situ polymerization of pyrrole, and finally the g-C3N4/PPy/Ag ternary composite photocatalyst was obtained by depositing Ag on the surface of g-C3N4/PPy. The photocatalytic activities of as-prepared samples were evaluated by degradation of antibiotic tetracycline （TC） under visible light. The influ- ence of the amounts of polypyrrole （PPy） and Ag on the photocatalytic activity of g-C3N4/PPy/Ag ternary photo- catalyst was investigated. Both PPy and Ag played critical roles for the enhanced photocatalytic activity of g-C3N4/PPy/Ag. The g-C3N4/PPy/Ag composites exhibited remarkably improved photocatalytic activities for de- grading TC compared with g-C3N4, g-C3N4/PPy and g-C3N4/Ag. Besides, the photocatalytic mechanism was also analyzed. The band match of PPy with g-C3N4 benefited the separation of photo-generated carriers in g-C3N4, and the deposited Ag nanoparticles played important roles as an electron mediator due to the surface plasmon resonance （SPR） effects. The present study offered new insight into the design of the economical and gently environ- ment-friendly synthesis of highly efficient photocatalysts.展开更多
Microplastics and phthalates are prevalent and emerging pollutants that pose a potential impact on human health.Previous studies suggest that both microplastics and phthalates can adversely affect the reproductive sys...Microplastics and phthalates are prevalent and emerging pollutants that pose a potential impact on human health.Previous studies suggest that both microplastics and phthalates can adversely affect the reproductive systems of humans and mammals.However,the combined impact of these pollutants on the female reproductive system remains unclear.Here we show the impacts of exposure to polystyrene microplastics(PS-MPs)and di-2-ethylhexyl phthalate(DEHP)on female Sprague-Dawley rats’reproductive systems.We find that co-exposure to PS-MPs and DEHP results in a marked increase in cystic and atretic follicles,oxidative stress,fibrosis,and dysregulation of serum sex hormone homeostasis in the ovaries of the rats.Proteomic analysis identified differentially expressed proteins that were predominantly enriched in signaling pathways related to fatty acid metabolism and tight junctions,regulated by transforming growth factorβ1(TGF-β1).We further confirm that co-exposure to DEHP and PS-MPs activates the TGF-β1/Smad3 signaling pathway,and inhibiting this pathway alleviates oxidative stress,hormonal dysregulation,and ovarian fibrosis.These results indicate that exposure to the combination of microplastics and phthalates leads to a significant increase in atretic follicles and may increase the risk of polycystic ovary syndrome(PCOS).Our study provides new insights into the reproductive toxicity effects of microplastics and DEHP exposure on female mammals,highlighting the potential link between environmental pollutants and the occurrence of PCOS.These findings highlight the need for comprehensive assessments of the reproductive health risks posed by microplastic pollution to women and contribute to the scientific basis for evaluating such risks.展开更多
Air pollution is a significant risk factor contributing to the burden of disease in China.Health risk assessment and management are important to reduce the impact of air pollution on public health.To help formulate st...Air pollution is a significant risk factor contributing to the burden of disease in China.Health risk assessment and management are important to reduce the impact of air pollution on public health.To help formulate standardized health risk assessment techniques,a series of studies were conducted from 2006 to 2019.Through systematic review,study of molecular mechanisms,epidemiological investigation,and health effect monitoring,the overall project established a monitoring and evaluation indicator system,a comprehensive information platform,software for automatic data cleaning,and standardized health risk assessment techniques.Technical specifications have been issued by the National Health Commission for promoting health risk assessments across China.This paper introduces the project,the research approach,its main research accomplishments,innovations,and public health significance,and describes directions for further research.展开更多
A novel biocompatible polymer was prepared by grafting the derivate of β-cyclodextrin （6-SH-β-CD） onto poly（3,4-dihydroxycinnamic acid） （PDHCA） via Michael addition. PDHCA-β-CD nanoparticles were prepared by ...A novel biocompatible polymer was prepared by grafting the derivate of β-cyclodextrin （6-SH-β-CD） onto poly（3,4-dihydroxycinnamic acid） （PDHCA） via Michael addition. PDHCA-β-CD nanoparticles were prepared by the self-assembly of amphiphilic PDHCA-β-CD polymer with N,N-dimethylformamide （DMF） as good solvent and water as poor solvent. The PDHCA-β-CD nanoparticles were monodispersed with spherical morphology as shown in the scanning electron microscopic （SEM） images in accord with the result of dynamic light scattering （DLS） measurement. The size of the nanoparticles could be controlled from 60 to 180 nm by tuning the grafting degree （GD） of PDHCA-β-CD polymer and also significantly influenced by the amount of water used during the process. These as-prepared nanoparticles were stable without any significant change in the particle size after six-months＇ storage and even after being irradiated by UV at 2〉280 nm for hours. The formation mechanism of PDHCA-β-CD nanoparticles was explored. The content of doxombicin （DOX） loaded onto the nanoparticles was up to 39% with relatively high loading efficiency （approximately 78.8% of initial DOX introduced was loaded）. In vitro release studies suggested that DOX released slowly from PDHCA-β-CD nanoparticles. These features strongly support the potential of developing PDHCA-β-CD nanoparticles as carriers for the controlled delivery of drug.展开更多
Optical isomers of N-lauroyl-L-（Or-D-） alanine sodium salt {C12-L-（Or-D-）AIaS} surfactants were used for the preparation of mesoporous silica nanoparticles with a twisted hexagonal rod-like morphology. Thermogravi...Optical isomers of N-lauroyl-L-（Or-D-） alanine sodium salt {C12-L-（Or-D-）AIaS} surfactants were used for the preparation of mesoporous silica nanoparticles with a twisted hexagonal rod-like morphology. Thermogravimetric analysis （TGA） was used to determine the temperature for template removal. Circular dichroism （CD） spectra of the surfactant solution with various compositions illustrated the formation and supramolecular assembly of protein-like molecular architecture leading to formation of twisted nanopar- ticles. Scanning electron microscopy （SEM）, high-resolution transmission electron microscopy （HRTEM） and X-ray powder diffraction （XRD） patterns of these as-synthesized mesoporous silica confirmed that the twisted morphology of these nanoparticles was closely related to the supramolecular-assembled complex of amino acid surfactants.展开更多
基金supported by the National Nature Science Foundation of China(No.22278179,U23A20688)the National Key Research and Development Program of China(2021YFB3802600)+3 种基金the Fundamental Research Funds for the Central Universities(JUSRP622035)National First-Class Discipline Program of Light Industry Technology and Engineering(LIFE2018-19)MOE&SAFEA for the 111 Project(B13025)Natural Science Foundation of Xinjiang Uygur Autonomous Region(2022D01D030).
文摘Negatively thermo-responsive 2D membranes,which mimic the stomatal opening/closing of plants,have drawn substantial interest for tunable molecular separation processes.However,these membranes are still restricted significantly on account of low water permeability and poor dynamic tunability of 2D nanochannels under temperature stimulation.Here,we present a biomimetic negatively thermo-responsive MXene membrane by covalently grafting poly(N-isopropylacrylamide)(PNIPAm)onto MXene nanosheets.The uniformly grafted PNIPAm polymer chains can enlarge the interlayer spacings for increasing water permeability while also allowing more tunability of 2D nanochannels for enhancing the capability of gradually separating multiple molecules of different sizes.As expected,the constructed membrane exhibits ultrahigh water permeance of 95.6 L m^(-2) h^(-1) bar^(-1) at 25℃,which is eight-fold higher than the state-of-the-art negatively thermoresponsive 2D membranes.Moreover,the highly temperature-tunable 2D nanochannels enable the constructed membrane to perform excellent graded molecular sieving for dye-and antibiotic-based ternary mixtures.This strategy provides new perspectives in engineering smart 2D membrane and expands the scope of temperature-responsive membranes,showing promising applications in micro/nanofluidics and molecular separation.
基金Supported by Jiangsu Province Engineering Research Center of Agricultural and Rural Pollution Prevention Technology and Equipment(Sufagaigaojifa[2022]No.1103)Innovation and Entrepreneurship Incubation Program for Students in Vocational Colleges of Jiangsu Province in 2023(G-2023-1257)+3 种基金High-end Training Program for Teachers Professional Leaders in Higher Vocational Colleges of Jiangsu Province in 2023(Sugaozhipeihan[2023]No.9)General Project of Philosophy and Social Science Research in Colleges and Universities of Jiangsu Province in 2023(2023SJYB1785)Project of Nantong Science and Technology Bureau(MSZ2022176MS22022120).
文摘As an important part of urban infrastructure,urban water system is of great and far-reaching significance for ensuring urban flood control and waterlogging safety,protecting ecological environment and building livable homes.Taking the urban water system of Nantong as an example,Nantong Water Resources Bureau issued R evision of Nantong Urban Water System Planning in 2017,and put forward the construction of the"two circles,eight lakes and nine veins"water system layout,giving new vitality to the urban water system.In view of problems existing in newly excavated artificial landscape lakes,such as fragile water ecosystem,strong eutrophication trend,poor environmental sensory effect and unsatisfactory water landscape effect,it is urgent to study the in-situ water ecological restoration technique of"algae-controlling zooplankton+submerged plant community"to build a"grass-type clear water"ecosystem for artificial landscape lakes,so as to improve the water sensory index and self-purification ability and finally realize the double improvement of"sensory effect and water quality"of artificial landscape lakes.
基金Supported by the Project for Philosophy and Social Science Research of Colleges and Universities in Jiangsu(2019SJA1539)Excellent Teaching Team of"Qinglan Project"of Colleges and Universities in Jiangsu(Sujiaoshihan[2020]No.10)+3 种基金Innovation and Entrepreneurship Training Planning Project for University Students in Jiangsu Province(202112684014Y)Construction Project of High-level Professional Group of Environmental Engineering Technology in Higher Vocational Education of Jiangsu Province(Sujiaozhihan[2020]No.31)Construction Project of Industry-Education Integration Platform in Jiangsu Province"Industry-Education Integration Platform of Ecological Environmental Protection and Control"(Sujiaozhihan[2019]No.26)School Talent Team Project(Tongkexiao[2021]No.10)。
文摘Based on the questionnaire survey of 337 farmers in 8 villages in Rugao City,Jiangsu Province,the gender,age and educational level of the main able-bodied people of farm households,the characteristics of farmers’production and living behaviors,farmers’cognition of rural non-point source pollution,and farmers’willingness to pay for rural non-point source pollution control and its influencing factors were studied.The results show that to protect the rural ecological environment,most farmers are willing to participate in rural non-point source pollution control,but the annual cost of rural non-point source pollution control is low,and the number of volunteer days is small.Rural grass-roots party organizations should stimulate farmers’willingness to participate in rural non-point source pollution control,give full play to the role of the branch as a fighting fortress,and build a mechanism for Party building to lead rural non-point source pollution control.
基金Supported by the Project for Philosophy and Social Science Research of Colleges and Universities in Jiangsu(2019SJA1539)Excellent Teaching Team of"Qinglan Project"of Colleges and Universities in Jiangsu(Sujiaoshihan[2020]No.10)+4 种基金Innovation and Entrepreneurship Training Planning Project for University Students in Jiangsu Province(202112684014Y)Construction Project of High-level Professional Group of Environmental Engineering Technology in Higher Vocational Education of Jiangsu Province(Sujiaozhihan[2020]No.31)Construction Project of Industry-Education Integration Platform in Jiangsu Province"Industry-Education Integration Platform of Ecological Environmental Protection and Control"(Sujiaozhihan[2019]No.26)Jiangsu Province Engineering Research Center of Agricultural and Rural Pollution Prevention Technology and Equipment(Sufagaigaojifa[2022]No.1103)School Talent Team Project(Tongkexiao[2021]No.10)。
文摘In view of the problems found in the in-depth interviews of the current situation of rural non-point source pollution control mechanism in Nantong City and their reasons,the following six countermeasures and suggestions are put forward,including giving full play to the role of fighting bastion of the Party branch and building a mechanism for Party building to lead the control of non-point source pollution in rural areas,giving prominence to the dominant role of farmers and establishing farmers’endogenous motivation excitation mechanism for rural non-point source pollution control,improving the interest coordination mechanism among multiple governance subjects and building a modern control system for rural non-point source pollution,combining regulations,administrative,economic,technical and other means of rural non-point source pollution control and strengthening the synergistic integration mechanism of multiple means of control,reconstructing the information disclosure mechanism of rural non-point source pollution control and building a comprehensive trust mechanism of multiple control subjects,and improving the mechanism for coordinating the supply of policy tools and ensure that basic mechanisms play their due role.
基金Supported by the Jiangsu Province Engineering Research Center of Agricultural and Rural Pollution Prevention Technology and Equipment(2023GRFX045)Innovation and Entrepreneurship Incubation Program for Students in Vocational Colleges of Jiangsu Province in 2023(G-2023-1257)+2 种基金High-end Training Program for Teachers Professional Leaders in Higher Vocational Colleges of Jiangsu Province in 2023(Sugaozhipeihan[2023]No.9)General Project of Philosophy and Social Science Research in Colleges and Universities of Jiangsu Province in 2023(2023SJYB1785)Project of Nantong Science and Technology Bureau(MSZ2022176,MS22022120).
文摘Aiming at the problems of water pollution and ecological environment degradation in urban artificial landscape lakes,the ecological restoration technologies of artificial landscape lakes at home and abroad were studied to provide some reference for the ecological restoration of urban artificial landscape lakes in China.
文摘g-C3N4/PPy/Ag ternary photocatalyst was synthesized by a three-step method. Firstly, graphitic carbon nitride （g-C3N4） photocatalyst was obtained by sintering melamine at high temperature, then a series ofg-C3N4/PPy com- posite photocatalysts were prepared by in-situ polymerization of pyrrole, and finally the g-C3N4/PPy/Ag ternary composite photocatalyst was obtained by depositing Ag on the surface of g-C3N4/PPy. The photocatalytic activities of as-prepared samples were evaluated by degradation of antibiotic tetracycline （TC） under visible light. The influ- ence of the amounts of polypyrrole （PPy） and Ag on the photocatalytic activity of g-C3N4/PPy/Ag ternary photo- catalyst was investigated. Both PPy and Ag played critical roles for the enhanced photocatalytic activity of g-C3N4/PPy/Ag. The g-C3N4/PPy/Ag composites exhibited remarkably improved photocatalytic activities for de- grading TC compared with g-C3N4, g-C3N4/PPy and g-C3N4/Ag. Besides, the photocatalytic mechanism was also analyzed. The band match of PPy with g-C3N4 benefited the separation of photo-generated carriers in g-C3N4, and the deposited Ag nanoparticles played important roles as an electron mediator due to the surface plasmon resonance （SPR） effects. The present study offered new insight into the design of the economical and gently environ- ment-friendly synthesis of highly efficient photocatalysts.
基金The National Natural Science Foundation of China(42277437)sponsored this research.
文摘Microplastics and phthalates are prevalent and emerging pollutants that pose a potential impact on human health.Previous studies suggest that both microplastics and phthalates can adversely affect the reproductive systems of humans and mammals.However,the combined impact of these pollutants on the female reproductive system remains unclear.Here we show the impacts of exposure to polystyrene microplastics(PS-MPs)and di-2-ethylhexyl phthalate(DEHP)on female Sprague-Dawley rats’reproductive systems.We find that co-exposure to PS-MPs and DEHP results in a marked increase in cystic and atretic follicles,oxidative stress,fibrosis,and dysregulation of serum sex hormone homeostasis in the ovaries of the rats.Proteomic analysis identified differentially expressed proteins that were predominantly enriched in signaling pathways related to fatty acid metabolism and tight junctions,regulated by transforming growth factorβ1(TGF-β1).We further confirm that co-exposure to DEHP and PS-MPs activates the TGF-β1/Smad3 signaling pathway,and inhibiting this pathway alleviates oxidative stress,hormonal dysregulation,and ovarian fibrosis.These results indicate that exposure to the combination of microplastics and phthalates leads to a significant increase in atretic follicles and may increase the risk of polycystic ovary syndrome(PCOS).Our study provides new insights into the reproductive toxicity effects of microplastics and DEHP exposure on female mammals,highlighting the potential link between environmental pollutants and the occurrence of PCOS.These findings highlight the need for comprehensive assessments of the reproductive health risks posed by microplastic pollution to women and contribute to the scientific basis for evaluating such risks.
基金The National Health and Family Planning Commission of the People’s Republic of China(201402022)China National Key Technology R&D Program(2006BAI19B05)+1 种基金the National Natural Science Foundation of China(20977089,81170255,30570799,81300013)Natural Science Foundation of Beijing Municipal(7164285).
文摘Air pollution is a significant risk factor contributing to the burden of disease in China.Health risk assessment and management are important to reduce the impact of air pollution on public health.To help formulate standardized health risk assessment techniques,a series of studies were conducted from 2006 to 2019.Through systematic review,study of molecular mechanisms,epidemiological investigation,and health effect monitoring,the overall project established a monitoring and evaluation indicator system,a comprehensive information platform,software for automatic data cleaning,and standardized health risk assessment techniques.Technical specifications have been issued by the National Health Commission for promoting health risk assessments across China.This paper introduces the project,the research approach,its main research accomplishments,innovations,and public health significance,and describes directions for further research.
基金This research was supported by the National Nattlral Science Foundation of China （No. 51173072）, the Fun- damental Research Funds for the Central Universities （JUSRP51408B） and Jiangsu Province Joint Innovation Funds （BY2014023-12）.
文摘A novel biocompatible polymer was prepared by grafting the derivate of β-cyclodextrin （6-SH-β-CD） onto poly（3,4-dihydroxycinnamic acid） （PDHCA） via Michael addition. PDHCA-β-CD nanoparticles were prepared by the self-assembly of amphiphilic PDHCA-β-CD polymer with N,N-dimethylformamide （DMF） as good solvent and water as poor solvent. The PDHCA-β-CD nanoparticles were monodispersed with spherical morphology as shown in the scanning electron microscopic （SEM） images in accord with the result of dynamic light scattering （DLS） measurement. The size of the nanoparticles could be controlled from 60 to 180 nm by tuning the grafting degree （GD） of PDHCA-β-CD polymer and also significantly influenced by the amount of water used during the process. These as-prepared nanoparticles were stable without any significant change in the particle size after six-months＇ storage and even after being irradiated by UV at 2〉280 nm for hours. The formation mechanism of PDHCA-β-CD nanoparticles was explored. The content of doxombicin （DOX） loaded onto the nanoparticles was up to 39% with relatively high loading efficiency （approximately 78.8% of initial DOX introduced was loaded）. In vitro release studies suggested that DOX released slowly from PDHCA-β-CD nanoparticles. These features strongly support the potential of developing PDHCA-β-CD nanoparticles as carriers for the controlled delivery of drug.
基金supported by National Nature Science Foundation of China (20876070)Research and Innovation Program for Graduate Colleges and Universities of Jiangsu Province(CX09B 171Z)
文摘Optical isomers of N-lauroyl-L-（Or-D-） alanine sodium salt {C12-L-（Or-D-）AIaS} surfactants were used for the preparation of mesoporous silica nanoparticles with a twisted hexagonal rod-like morphology. Thermogravimetric analysis （TGA） was used to determine the temperature for template removal. Circular dichroism （CD） spectra of the surfactant solution with various compositions illustrated the formation and supramolecular assembly of protein-like molecular architecture leading to formation of twisted nanopar- ticles. Scanning electron microscopy （SEM）, high-resolution transmission electron microscopy （HRTEM） and X-ray powder diffraction （XRD） patterns of these as-synthesized mesoporous silica confirmed that the twisted morphology of these nanoparticles was closely related to the supramolecular-assembled complex of amino acid surfactants.
