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Mechanism for the promotional formation of NH_(4)^(+) by SO_(2) on different mineral dust surfaces

Particuology 2023年第4期75卷 109-118页

作者： Hao Li Qingxin Ma Biwu Chu Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-environmental SciencesChinese Academy of SciencesBeijing100085China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen361021China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing100029China

Ammonium is an important atmospheric particulate component that dictates many environmental *** promotion of the heterogeneous conversion of NH_(3) to NH_(4)^(+) by SO_(2) on different mineral dust surfaces displays remarkable discrepancies,especially on MgO and α-Fe2O3 surfaces,however,the underlying mechanisms are not well ***,using periodic density functional theory(DFT)calculation and Born-Oppenheimer molecular dynamics(BOMD)simulation,we explored the hetero-geneous adsorption of NH_(3) on MgO(110)and α--Fe2O3(001)surfaces in the presence and absence of SO_(2).The results show that on MgO(110)surface,hydrogen-bonding interactions of NH_(3) on both adsorbed hydroxyl or bisulfite/bisulfate sites are observed no matter whether SO_(2) is present or ***,on theα-Fe2O3(001)surface,significant conversion of NH_(3) to NH_(4)^(+)occurs with the coexistence of SO_(2),which is due to the hydrogen transfer reaction from surface HSO4 to N in NH_(3).The fundamental reason may be that the stronger electron affinity of Fe3+than Mg2+results in adsorbed bisulfate and/or bisulfite with greater acidity on α-Fe2O3 surface than MgO *** results give a molecular-level explanation for the heterogeneous conversion of NH_(3) to NH_(4)^(+)on different mineral dust surfaces under complex air pollution *** the fact that ammonium is abundant in secondary particulates,this work would help in understanding the rapid conversion of ammonia to ammonium and in developing classification governance policies for the key precursor pollutants in China.

关键词： Mineral dust Heterogeneous reaction Theoretical calculation Ammonium SO_(2)

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Screening legacy and emerging organic pollutants in the contaminated soil of Dhaka,Bangladesh

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Emerging Contaminants 2024年第3期10卷 343-353页

作者： Refayat Nigar Shizhen Zhao Xin Liu Huanfang Huang Lele Tian Yuwei Xiao Ahsan Habib Gan Zhang State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou510640China Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization Guangzhou510640China Anti-Drug Technology Center of Guangdong Province and National Anti-Drug Laboratory Guangdong Regional Center Guangzhou510230China State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control South China Institute of Environmental SciencesMinistry of Ecology and EnvironmentGuangzhou510530China Department of Chemistry University of DhakaDhaka1000Bangladesh University of Chinese Academy of Sciences Beijing100049China

The current understanding of the legacy and emerging organic pollutants in the soil of Bangladesh remains *** disposal practices,particularly in e-waste,landfills,and industrial operations,may lead to the pervasive presence of persistent organic pollutants(POPs)and polycyclic aromatic hydrocarbons(PAHs)in the *** study aimed to systematically investigate the concentrations,sources,and risk assessment of halogenated flame retardants(HFRs),polychlorinated biphenyls(PCBs),polychlorinated naphthalenes(PCNs),organochlorine pesticides(OCPs),chlorinated paraffins(CPs),and PAHs in the contaminated soil of Dhaka's dumpsites,e-waste,and industrial areas collected in *** total concentration of investigated pollutants averaged at 4790±4040 ng g^(-1)dw,with the following order:P44CPs(4110±4140 ng g^(-1)dw)>P16PAHs(422±491 ng g^(-1)dw)>P16HFRs(190±538 ng g^(-1)dw)>P209PCBs(43.5±73.5 ng g^(-1)dw)>P50PCNs(17.7±21.0 ng g^(-1)dw)>P27OCPs(9.41±9.61 ng g^(-1)dw).The e-waste site exhibited the highest total concentration of the target pollutants,reaching 12,700 ng g1 *** were the predominant contributors,accounting for averages of 81.8%,70.5%,and 68.5%to waste landfills,e-waste,and industrial sites,respectively.A comprehensive analysis of 209 PCB congeners revealed their primary origin from Aroclor PCBs,with minor contributions from unintentionally produced *** highest incremental lifetime carcinogenic risk(ILCR)occurred in e-waste sites,contributed by dioxin-like PCBs,with a maximum value of 5.9×10^(-5)for adults,exceeding the limit 1.0×10^(-6)set by the *** non-carcinogenic hazard quotients(HQs)were much lower,suggesting no significant risk from the investigated *** findings highlight the importance of proper waste management and regulated e-waste recycling to mitigate potential hazardous risks to the Bangladeshi population.

关键词： Persistent organic pollutants Polycyclic aromatic hydrocarbons Chlorinated paraffins Polychlorinated biphenyls Risk assessment Contaminated soil Bangladesh

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Eutrophication in cold-arid lakes: molecular characteristics and transformation mechanism of DOM under microbial action at the ice-water interface

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Carbon Research 2024年第1期3卷 1-17页

作者： Wang, Tengke Feng, Weiying Liu, Jing Fan, Wenhong Li, Tingting Song, Fanhao Yang, Fang Liao, Haiqing Leppäranta, Matti School of Materials Science and Engineering Beihang University Beijing100191 China Environment Research Institute Shandong University Qingdao266273 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Institute for Atmospheric and Earth System Research University of Helsinki Helsinki00014 Finland

During freezing periods, nutrients (carbon and organic matter, etc.) are enriched in the water and sediment of lakes in cold-arid regions, leading to potential algal bloom outbreaks and other health risks to the ecosystem. Particularly, dissolved organic matter (DOM) is a critical component of the nutrients and plays an important role in the global carbon cycle. However, the mechanisms of DOM transfer between ice and water remain unclear. This study analyzed the influence of microbial community on DOM composition using 16 s RNA, 3DEEM, and FT-ICR MS in Daihai Lake and Wuliangsuhai Lake in the Yellow River Basin, China. According to the spectral analysis, the content of endogenous organic matter, such as humus, accounted for 40% of the total DOM in water, while the content of tryptophan and tyrosine accounted for 80% of the total DOM in ice. The results of mass spectrometry showed that lignin was the main component, and the content of organic matter in the ice was less than that in the water. Molecular structures of seven DOM coexisting in the lake ice and water were elucidated with adapted Kendrick-analogous network visualization, which clearly illustrates that long-chain DOM molecules are derived from small molecules, while other heteroatoms are complexed with the side groups. The positive correlations between CHO, CHNO, CHOS, CHOS and Actinomyces indicate that DOM actively interacted with the microbial community. 44% of CHO compounds have the same molecular formula in water, the content of CHOS in the water of the two lakes was closed to 7% higher than that in the ice. Meanwhile, DOM dynamically migrate between ice and water via interstitial water because of the solubility changes under microbial transformation, which has been proved by the decrease in the contents of the humus and tryptophan-like substances in the ice from the bottom to the surface and lower contents of carbohydrate and unsaturated aromatic hydrocarbon in the water than the ice. This study helps

关键词： Aromatization

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Pumping and sliding of droplets steered by a hydrogel pattern for atmospheric water harvesting

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National Science Review 2023年第12期10卷 181-192页

作者： Wei Zhang Qinghua Ji Gong Zhang Zhenao Gu Haozhi Wang Chengzhi Hu Huijuan Liu Zhiyong Jason Ren Jiuhui Qu Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of Environment Tsinghua University Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences University of Chinese Academy of Sciences Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education) School of Materials Science and EngineeringTianjin University Department of Civil and Environmental Engineering and Andlinger Center for Energy and the Environment Princeton University

Atmospheric water harvesting is an emerging strategy for decentralized and potable water supplies. However,water nucleation and microdroplet coalescence on condensing surfaces often result in surface flooding owing to the lack of a sufficient directional driving force for shedding. Herein, inspired by the fascinating properties of lizards and catfish, we present a condensing surface with engineered hydrogel patterns that enable rapid and sustainable water harvesting through the directional pumping and drag-reduced sliding of water droplets. The movement of microscale condensed droplets is synergistically driven by the surface energy gradient and difference in Laplace pressure induced by the arch hydrogel patterns. Meanwhile, the superhydrophilic hydrogel surface can strongly bond inner-layer water molecules to form a lubricant film that reduces drag and facilitates the sliding of droplets off the condensing surface. Thus, this strategy is promising for various water purification techniques based on liquid–vapor phase-change processes.

关键词： atmospheric water harvesting droplet manipulation bio-inspired condensation

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Black titanium dioxide nanomaterials for photocatalytic removal of pollutants:A review

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Journal of Materials Science & Technology 2022年第17期112卷 239-262页

作者： Ying Liang Guohe Huang Xiaying Xin Yao Yao Yongping Li Jianan Yin Xiang Li Yuwei Wu Sichen Gao State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China State Key Joint Laboratory of Environmental Simulation and Pollution Control China-Canada Center for EnergyEnvironment and Ecology ResearchUR-BNUSchool of EnvironmentBeijing Normal UniversityBeijing 100875China Department of Environmental Systems Engineering University of ReginaReginaSKS4S 0A2Canada State Key Laboratory of Marine Pollution(SKLMP) City University of Hong KongKowloonHong Kong SARChina Faculty of Engineering and Applied Science University of ReginaReginaSaskatchewanS4S 0A2Canada

Semiconductor photocatalysis is one of the most widely used environment-friendly technologies for removing various *** a well-developed photocatalyst,titanium dioxide(TiO_(2))still has limits in its wide bandgap and rapid recombination rate of photogenerated charge ***,black TiO_(2)appears as a strong candidate in the improvement of sunlight harvesting,because of its excellent absorption capacity and utilization of solar *** extensive applications in both environmental and energy fields,the use of black TiO_(2)as a photocatalyst in pollutant removal is *** primary objective of the review is to comprehensively evaluate the applications of black TiO_(2)in photocatalytic removal of contaminants,including conventional organic contaminants,emerging contaminants,microbes,and heavy *** basic properties,photocatalytic mechanism,and synthesis of black TiO_(2)have been summarized and ***,the stability and recoverability of black TiO_(2)have also been ***,the perspectives of the application of black TiO_(2)in pollutant removal have been further discussed.

关键词： Photocatalysis Back TiO_(2) Ti^(3+)self-doping Nanomaterials Pollutant removal

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The development of local ambient air quality standards: A case study of Hainan Province, China

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Eco-Environment & Health 2024年第1期3卷 11-20页

作者： Qian Song Nannan Zhang Yanning Zhang Dejia Yin Jiming Hao Shuxiao Wang Shengyue Li Wenshuai Xu Weijun Yan Xinxin Meng Xinghong Xu Xiaochen Wu Donghai Xie Yun Zhu Qipeng Qu Xuan Hou Yueqi Jiang Zhaoxin Dong Haotian Zheng Yisheng Sun Zeqi Li Bin Zhao State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China Institute of Strategic Planning Chinese Academy of Environmental PlanningBeijing 100041China Hainan Research Academy of Environmental Sciences Haikou 571126China Hainan Provincial Ecological and Environmental Monitoring Center Haikou 570206China Hainan Radiation Environmental Monitoring Station Haikou 571126China Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control College of Environment and EnergySouth China University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou 510006China

The ambient air quality standard(AAQS)is a vital policy instrument for protecting the environment and human *** Province is at the forefront of China's efforts to protect its ecological environment,with an official goal to achieve world-leading air quality by ***,neither the national AAQS nor the World Health Organization guideline offers sufficient guidance for improving air quality in Hainan because Hainan has well met the former while the latter is excessively ***,the establishment of Hainan's local AAQS becomes ***,research regarding the development of local AAQS is scarce,especially in comparatively more polluted countries such as *** relatively high background values and significant interannual fluctuations in air pollutant concentrations in Hainan present challenges in the development of local *** research proposes a world-class local AAQS of Hainan Province by reviewing the AAQS in major countries or regions worldwide,analyzing the influence of different statistical forms,and carefully evaluating the attainability of the *** the proposed AAQS,the annual mean concentration limit for PM2.5,the annual 95th percentile of daily maximum 8-h mean(MDA8)concentration limit for O_(3),and the peak season concentration limit for O_(3) are set at 10,120,and 85μg/m^(3),*** study indicates that,with effective control policies,Hainan is projected to achieve compliance with the new standard by *** implementation of the local AAQS is estimated to avoid 1,526(1,253–1,789)and 259(132–501)premature deaths attributable to longterm exposure to PM2.5 and O_(3) in Hainan in 2035,respectively.

关键词： Local ambient air quality standard Statistical form Feasibility Health effects Hainan province

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Real-Time Black Carbon Emissions from Light-Duty Passenger Vehicles Using a Portable Emissions Measurement System

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Engineering 2022年第9期16卷 73-81页

作者： Xuan Zheng Liqiang He Xiaoyi He Shaojun Zhang Yihuan Cao Jiming Hao Ye Wu College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution ControlTsinghua UniversityBeijing 100084China Center for Sustainable Systems School for Environment and SustainabilityUniversity of MichiganAnn ArborMI 48109-1041USA State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China

Black carbon(BC)is considered the second largest anthropogenic climate forcer,but the radiative effects of BC are highly correlated with its combustion ***-road vehicles are an important source of anthropogenic ***,there are major uncertainties in the estimates of the BC emissions from on-road light-duty passenger vehicles(LDPVs),and results obtained with the portable emissions measurement system(PEMS)method are particularly *** developed a PEMS platform and evaluated the on-road BC emissions from ten in-use *** demonstrated that the BC emission factors(EFs)of gasoline direction injection(GDI)engine vehicles range from 1.10 to 1.56 ***^(-1),which are higher than the EFs of port fuel injection(PFI)engine vehicles(0.10–0.17 ***^(-1))by a factor of *** BC emissions during the cold-start phase contributed 2%–33%to the total emissions.A strong correlation(R^(2)=0.70)was observed between the relative BC EFs and average vehicle speed,indicating that traffic congestion alleviation could effectively mitigate BC ***,BC and particle number(PN)emissions were linearly correlated(R^(2)=0.90),and compared to PFI engine vehicles,the instantaneous PN-to-BC emission rates of GDI engine vehicles were less sensitive to vehicle specific power-to-velocity(VSPV)increase in all speed ranges.

关键词： Black carbon Light-duty gasoline vehicles Portable emissions measurement system Real-time emissions

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Cu-clusters nodes of 2D metal-organic frameworks as a cost-effective noble-metal-free cocatalyst with high atom-utilization efficiency for efficient photocatalytic hydrogen evolution

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Chinese Chemical Letters 2022年第6期33卷 3049-3052页

作者： Guangmei Jiang Xingyan Liu Huilong Jian Peng Lu Jinwu Bai Guizhi Zhang Wen Yun Siqi Li Youzhou He Chongqing Key Laboratory of Catalysis and New Environmental Materials College of Environment and ResourcesChongqing Technology and Business UniversityChongqing 400067China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

Several 2D nanosheets of porphyrin MOFs with various transition-metal clusters as metal nodes were prepared via a simple solvothermal method to apply in the photocatalytic hydrogen evolution,in which the hydrogen production rate of the optimal NS-Cu was as high as 15.39 mmol g^(-1)h^(-1).A series of experimental technologies especially cyclic voltammetry(CV)and Mott-Schottky(M-S)had been adopted to investigate the charge-transfer property of photo-generated electron-hole pairs,it was found that the uniformly dispersed Cu-clusters nodes in the original 2D MOFs played a key role in the electron transfer process,that was,the photo-generated electron transferred from excited state eosin-Y to the Cu-clusters nodes for the efficient hydrogen *** excellent photocatalytic performance could be attributed to the reversible oxidation-–reduction process of Cu^(Ⅱ)/Cu^(Ⅰ),which had excellent electron-receiving and electron-outputting *** results provided a novel avenue to adapt the uniformly dispersed metal nodes in the original MOFs as cost-effective noble-metal-free cocatalysts with very high atomutilization efficiency to improve the photocatalytic hydrogen evolution performance in dye-sensitized system.

关键词： 2D nanosheets Photocatalytic hydrogen production Cu-clusters nodes Cu^(Ⅱ)/Cu^(Ⅰ) Cocatalysts

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Insight into the effects of C_(3)H_(6)on fresh and hydrothermally aged Cu-SSZ-39 catalysts

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Chinese Chemical Letters 2025年第3期36卷 164-169页

作者： Jinpeng Du Junlin Chen Yulong Shan Tongliang Zhang Yu Sun Zhongqi Liu Xiaoyan Shi Wenpo Shan Yunbo Yu Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341119China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

Hydrocarbons(HCs),as major poisoning substances,have a crucial influence on NH_(3)-SCR *** this work,the effects of C_(3)H_(6)on fresh and hydrothermally aged Cu-SSZ-39 catalysts with different copper contents were *** catalysts suffered a deactivation above 250℃,especially between 300-400℃,which was mainly related to the reaction between NH_(3)and C_(3)H_(6).However,the hydrothermally aged and the high-copper-loaded Cu-SSZ-39 catalysts could achieve a recovery of NH_(3)-SCR performance at high *** activity recovery was attributed to the oxidation of C_(3)H_(6)by CuxOy species,which therefore inhibited the reaction between NH_(3)and C_(3)H_(6).As a result,more NH_(3)could be available for the NH_(3)-SCR reaction and the Cu-SSZ-39 catalysts could maintain a good catalytic *** on these findings,we proposed that high loaded Cu-SSZ-39 catalysts with a little CuOx formed are preferred for application.

关键词： Diesel vehicle emission NO_(x)abatement NH3-SCR Cu-SSZ-39 zeolite C_(3)H_(6)poisoning

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Chemodiversity of Fulvic Acid as Affected by Different Biowastes Materials During Composting: An Analysis by Ultraviolet–Visible Spectroscopy 14th

Chemodiversity of Fulvic Acid as Affected by Different Biowa...

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14th International Conference on environmental Science and Development, ICESD 2023

作者： Sun, Qingyu Cui, Yini Gao, Yiman Tan, Wenbing Xingtai Eco-Environmental Monitoring Center of Hebei Province Xingtai054000 China State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing100012 China

ISBN: (纸本)9783031560552

To explore the effect of UV–Vis spectra of different compost materials, this paper adopted nine other research materials on spectral characteristics of composting fulvic acid (FA). The results showed that the UV–Vis unit molar absorption strength increased in each compost, particularly stem waste, leaf waste, and cabbage waste, implying that the aromatization and unsaturated degree of FA increased, as did the humification of compost. Correlation analysis showed that germination index (GI) was positively correlated with E250/E365, significantly positively correlated with SUVA254 and S275–295, SR, and strongly negatively correlated with E253/E203, respectively. Therefore, E253/E203, SUVA254, S275–295, and E250/E365 could be used to evaluate compost maturity. Furthermore, all compost could be regarded as an indicator of reaching maturation when SUVA254 is higher than 0.21 mg/L. The change of maturity parameters indicated that E465/E665 of leaf waste, cabbage waste, stem waste, and municipal solid waste declined during composting, SUVA254, A240–400, S275–295, A3/A2 of kitchen waste, chicken manure, pig manure, and peat increased during composting. To summarize, the organic matter molecular weight, compost stability, and degree of humification significantly increased. Compost was classified into three groups based on hierarchical cluster analysis: cabbage waste, stem waste, and peat were in the first group;kitchen waste and leaf waste were in the second group;and pig manure, chicken manure, municipal solid waste, and grass waste were in the third group. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Municipal solid waste

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