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Degradation of antibiotics and profiling of transformation products upon peracetic acid–mediated treatment of electrochlorinated groundwater in a flow–through reactor

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Water Research 2025年 284卷

作者： Wang Lu Nan Chen Chuanping Feng Gong Zhang Ignasi Sirés Laboratori d’Electroquímica dels Materials i del Medi Ambient Departament de Ciència de Materials i Química Física Secció de Química Física Facultat de Química Universitat de Barcelona 08028 Barcelona Spain School of Water Resources and Environment MOE Key Laboratory of Groundwater Circulation and Environmental Evolution China University of Geosciences (Beijing) Beijing 100083 People’s Republic of China College of Environment Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control College of Environment Tsinghua University Beijing 100084 China

Preventing the formation of hazardous chlorinated transformation products (Cl–TPs) when applying the electrochemical advanced oxidation processes (EAOPs) is a major challenge for ensuring their broader scale-up. In this context, the addition of peracetic acid (PAA) can potentially contribute to reduce the risk of Cl–TPs, but the associated transformation pathways remain insufficiently understood. Here, PAA–mediated electrochlorination process was found to reduce typical Cl-TPs (e.g., chloroform below 60 μg L –1 ) by 26.9 %∼80.8 %. Under optimized conditions, an innovative PAA–based treatment in a single-pass flow–through electrochemical reactor achieves the removal of four mixed antibiotics with low specific energy consumption (5.3 Wh mmol –1 ). The antibiotics concentration in the effluent remained below the detection limit within 10 operation cycles. In addition, reductions in Cl–TPs were achieved in both simulated and actual groundwater, meeting the 2022 Chinese drinking water quality standards. Fourier transform ion cyclotron resonance mass spectrometry (FT−ICR MS) revealed that PAA–based electrochlorination preferentially removed highly unsaturated heavy byproducts (O/C < 0.3, MW >400 Da), and the CHOCl formulae number decreased by 59 %. The transformation pathways of Cl–TPs were mainly identified as decarbonylation, dihydroxylation, and hydrogenation. Moreover, the possible halogenation pathways number showed a significant decrease of 77.9 %. These findings provide deeper insights into the degradation mechanisms and Cl–TPs minimization during PAA−mediated electrochemical antibiotic degradation, shedding light on the transformation processes in diverse environmental scenarios.

关键词： Antibiotic residues EAOPs FT−ICR MS Peracetic acid Transformation products

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Strong ozone production at a rural site in the North China Plain: Mixed effects of urban plumes and biogenic emissions

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Journal of environmental Sciences 2018年第9期30卷 261-270页

作者： Ruihan Zong Xue Yang Liang Wen Caihong Xu Yanhong Zhu Tianshu Chen Lan Yao Liwei Wang Junmei Zhang Lingxiao Yang Xinfeng Wang Min Shao Tong Zhu Likun Xue Wenxing Wang Environment Research Institute Shandong University Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3) Fudan Tyndall Center Department of Environmental Science and Engineering Fudan University State Key Laboratory for Environment Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking University

Regional ozone （O3） pollution has drawn increasing attention in China over the recent decade, but the contributions from urban pollution and biogenic emissions have not been clearly elucidated. To better understand the formation of the regional O3 problem in the North China Plain （NCP）, intensive field measurements of O3 and related parameters were conducted at a rural site downwind of Ji＇nan, the capital city of Shandong province, in the summer of 2013. Markedly severe 03 pollution was recorded, with the 03 mixing ratios exceeding the Chinese national ambient air quality standard on 28 days （a frequency of 78%） and with a maximum hourly value of 198 ppbv. Extensive regional transport of well-processed urban plumes to the site was identified. An observation-constrained chemical box model was deployed to evaluate in situ photochemical O3 production on two episodes. The results show that the in situ formation accounted for approximately 46% of the observed O3 accumulation, while the remainder （54%） was contributed by regional transport of the O3-laden urban plumes. The in situ ozone production was in a mixed controlled regime that reducing either NOx or VOCs would lead to a reduction of ozone formation. Biogenic VOCs played an important role in the local ozone formation. This study demonstrates the significant mixed effects of both anthropogenic pollution from urban zones and biogenic emission in rural areas on the regional 03 pollution in the NCP region, and may have general applicability in facilitating the understanding of the formation of secondary pollution over China.

关键词： Ozone Regional transport In situ photochemical formation Biogenic VOCs Observation-based model North China Plain

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Responses of plant^(15)N natural abundance and isotopic fractionation to N addition reflect the N status of a temperate steppe in China

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Journal of Plant Ecology 2019年第3期12卷 550-563页

作者： Zhilu Sheng Yongmei Huang Kejian He Narigele Borjigin Hanyue Yang Huiying Chen Engui Li Xia Xu Lei Duan State Key Laboratory of Earth Surface and Resource Ecology Faculty of Geographical ScienceBeijing Normal UniversityNo.19XinJieKouWai St.HaiDian DistrictBeijing 100875China Key Laboratory of Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region College of Resource and EnvironmentYunnan UniversityNo.2Cuihu North RoadWuhua DistrictKunming 650091China State Key Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityNo.30Shuangqing RoadHaiDian DistrictBeijing 100084China

Aims Elevated anthropogenic nitrogen(N)deposition could alter N status in temperate ***,threshold observations of N status change from N limit to N saturation by far are not conclusive in these *** on the natural abundance of ^(15)N( δ^(15)N)could greatly help provide integrated information about ecosystem N *** goal of this study was to investigate the suitability of measurements of δ^(15)N of major ecosystem N pools and several key species,plant ^(15)N fractionation,together with key vegetation and soil indicators in response to N fertilization as a tool to identify the N status in a temperate steppe in Inner *** We carried out a N addition experiment during 2011-14 on a Stipa krylovii steppe in Inner Mongolia,Northern *** investigated the response of several key N transformation processes,vegetation and soil properties to N *** biomass and below-ground biomass(BGB) δ^(15)N,root and foliar δ^(15)N of three dominant species(Artemisia frigida,*** and Leymus chinensis), δ^(15)N of soil total N and soil KCl-extractable NO_(3)^(−)-N were *** responses of isotope fractionation during plant N uptake and reallo-cation to N addition were also *** Findings Our results suggest that the N addition rate of 5g N m^(−2) yr^(−1) could be regarded as threshold of early N saturation in this *** steppe as indicated by an increase in plant fraction-ation and a decrease in plant δ^(15)*** N input rate is>10 g N m^(-2) yr^(-1),increased N deposition can lead to an apparent reduction in species richness and BGB as well as an increase in NO_(3)^(−)in extractable soil pools<30-cm soil *** N addition,*** and *** undergo earlier N status shift from N limitation toward N excess compared with ***-sis,contributing to *** out-competing other ***,this study provides a better understanding of N status change in temperate steppe based on i

关键词： N deposition ^(15)N natural abundance temperate steppe N saturation

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Roles of membrane and organic fouling layers on the removal of endocrine disrupting chemicals in microfiltration

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Journal of environmental Sciences 2018年第10期30卷 176-184页

作者： Wenchao Xue Kang Xiao Peng Liang Xia Huang State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Department of Environmental Engineering Faculty of Engineering Chulalongkorn University College of Resources and Environment University of Chinese Academy of Sciences

To understand the adsorption behavior of endocrine disrupting chemicals（EDCs） is important for enhancing the treatment performance and preventing potential secondary pollution caused by EDCs desorption in a microfiltration system. The dynamic adsorption of four representative EDCs, namely estriol（E3）, 17β-estradiol（E2）, 17α-ethynylestradiol（EE2）, and 4-nonylphenol（4-NP） in a microfiltration system was investigated using the Thomas＇ *** product of the equilibrium constant and the total adsorption capacity of the membrane,Ka, for E3, E2, EE2, and 4-NP were 4.91, 9.78, 15.6, and 826, respectively, strongly correlating with the compound octanol–water partition coefficient（KOW）. Adsorption appeared to be enhanced when organic fouling formed on the surface of membrane, indicating the role of an additional adsorption column for EDCs acted by a fouling layer in microfiltration. Results of a comparison between the Ka values for clean membrane and fouled membrane illustrated that the significant contribution made by fouling layers may be attributed to the foulant layer＇s hydrophobicity（in the case of calcium humate layer） and thickness（in the case of calcium alginate layer）. This study provided a novel perspective to quantitatively analyze the dynamic adsorption behavior of trace pollutants in membrane process.

关键词： Endocrine disrupting chemicals Microfiltration membrane Dynamic adsorption Thomas＇ model Organic membrane fouling

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A novel light source provided by photobacteria to improve the growth of microalgal biofilm

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Bioresource Technology Reports 2019年 6卷 138-144页

作者： Zhuang, Lin-Lan Yu, Huifang Yang, Ting Sun, Shuo Wang, Jinyun School of Environmental Science and Engineering Shandong University Jinan250100 China Environmental Simulation and Pollution Control State Key Joint Laboratory School of Environment Tsinghua University Beijing100084 China Department of Environment and Geography University of York Heslington WentworthWay YorkYO10 5NG United Kingdom Hebei Environmental Monitoring Centre Shijiazhuang050000 China

Attached microalgae cultivation for biomass/bioenergy production has been proposed these decades to avoid the energy-intensive harvest process. However, the external light could only propagate © 2019 Elsevier Ltd

关键词： Microalgae

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Efficient removal of perfluoroalkyl acids from water using a regenerable magnetic activated carbon

Efficient removal of perfluoroalkyl acids from water using a...

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第十四届持久性有机污染物论坛暨化学品环境安全大会

作者： Pingping Meng Xiaolu Fang Shubo Deng Gang Yu State Key Joint Laboratory of Environment Simulation and Pollution Control Key Laboratory forEmerging Organic Contaminants ControlSchool of EnvironmentTsinghua UniversityBeijing100084

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Look Up: Probing the Vertical Profile of New Particle Formation and Growth in the Planetary Boundary Layer With Models and Observations

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Journal of Geophysical Research: Atmospheres 2023年第3期128卷 e2022JD037525-e2022JD037525页

作者： O’Donnell, Samuel E. Akherati, Ali He, Yicong Hodshire, Anna L. Shilling, John E. Kuang, Chongai Fast, Jerome D. Mei, Fan Schobesberger, Siegfried Thornton, Joel A. Smith, James N. Jathar, Shantanu H. Pierce, Jeffrey R. Department of Atmospheric Science Colorado State University Fort Collins CO United States Ramboll USA Inc. Arlington VA United States State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University Beijing China Handix Scientific Fort Collins CO United States Pacific Northwest National Laboratory Richland WA United States Brookhaven National Laboratory Upton NY United States Department of Atmospheric Science University of Washington Seattle WA United States Department of Applied Physics University of Eastern Finland Kuopio Finland Department of Chemistry University of California Irvine Irvine CA United States Department of Mechanical Engineering Colorado State University Fort Collins CO United States

The processes of new particle formation (NPF) and growth are important contributors to cloud condensation nuclei (CCN) concentrations, and CCN are important for climate from their impact on planetary radiative forcing. While the general ubiquity and importance of NPF is understood, the vertical extent and governing mechanisms of NPF and growth in the lower troposphere are uncertain. We present an analysis of four NPF events and two non-NPF events during the HI-SCALE field campaign at the Southern Great Plains observatory in Oklahoma, USA. First, we analyzed airborne and ground-based observations of aerosol and gas-phase properties. Second, we used a column aerosol chemistry and microphysics model to probe factors that influence the vertical profile of NPF. During HI-SCALE, we found several instances of enhanced NPF occurring several hundred meters above the surface;however, the spatio-temporal characteristics of the observed NPF made comparisons between airborne- and ground-based observations difficult. The model represented the observed NPF (or lack of NPF) and particle growth at the surface to final diameters within 10 nm. The model predicted enhanced NPF rates in the upper mixed layer, and this enhancement is primarily due to the temperature dependence in the NPF schemes, but this was also dependent on the vertical profile of gas-phase precursors measured during HI-SCALE. We found vertical mixing in the model either enhanced or suppressed NPF rates, aerosol number concentrations, and particle growth rates at the surface. Finally, our analysis provides insights for future field campaigns and modeling efforts investigating the vertical profile of NPF. © 2023. The Authors.

关键词： mixed layer new particle formation NPF nucleation planetary boundary layer SOA

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Integrated Systems Modeling for Assessing the Water–Energy Nexus in Pakistan: Lessons Learned From Coupling LEAP–WEAP Planning Approaches

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Engineering 2025年

作者： Riaz Ahmad Gengyuan Liu Syed Aziz Ur Rehman Yuan Gao Fanxin Meng Xuanru Zhou Bojie Liu Silvio Cristiano State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China Beijing Engineering Research Center for Watershed Environmental Restoration & Integrated Ecological Regulation Beijing 100875 China Department of Environmental Sciences University of Veterinary and Animal Sciences Lahore 54000 Pakistan China Nuclear Power Engineering Co. Ltd. Beijing 100840 China Department of Architecture University of Florence Florence 50121 Italy

Systems thinking is crucial in developing strategies for managing and allocating resources in complex scenarios. In the Global South, Pakistan faces challenges such as water scarcity and energy crises, which require integrated approaches. This study combines long-range energy alternatives planning (LEAP) with a water evaluation and planning system (WEAP) to explore potential strategies for managing interconnected water and energy resources in Pakistan. The aim of this work is to identify policy flaws and assess the consequences of water–energy decisions in Pakistan. The findings suggest that maintaining the current status quo will hinder Pakistan’s goal of reducing its water consumption by 30% by 2027 and its energy usage by 50% by 2030. Innovative modeling scenarios suggest that energy and water consumption reductions in the agricultural, domestic, industrial, and transport sectors could save up to 15% energy usage by 2050. However, water-saving strategies can inadvertently lead to increased energy consumption, particularly in the agricultural and industrial sectors, with projections reaching an additional 2.8 million tonnes of oil equivalent (MTOE) by 2050. Realizing Pakistan’s policy goals and meeting its targets present considerable challenges for the government, especially against the backdrop of severe economic conditions. Current policies necessitate significant investments of 145 billion PKR (∼500 million EUR or USD) for water conservation and an additional 10 billion PKR for energy-conservation measures by 2030. Despite international financial aid, the success of these initiatives is at risk due to political instability, administrative weaknesses, and institutional shortcomings.

关键词： Urban and regional energy governance Water spatial planning Water-energy nexus Sustainable development

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Organophosphate flame retardants in leachates from six municipal landfills across China

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Chemosphere 2019年 218卷 836-844页

作者： Chengdu Qi Gang Yu Mengmeng Zhong Guilong Peng Jun Huang Bin Wang School of Environment State Key Joint Laboratory of Environmental Simulation and Pollution Control (SKLESPC) Beijing Key Laboratory for Emerging Organic Contaminants Control Tsinghua University Beijing 100084 China School of Environment Nanjing Normal University Nanjing 210023 China. School of Environment State Key Joint Laboratory of Environmental Simulation and Pollution Control (SKLESPC) Beijing Key Laboratory for Emerging Organic Contaminants Control Tsinghua University Beijing 100084 China. Electronic address: yg-den@***. School of Environment State Key Joint Laboratory of Environmental Simulation and Pollution Control (SKLESPC) Beijing Key Laboratory for Emerging Organic Contaminants Control Tsinghua University Beijing 100084 China.

With the phasing out of brominated flame retardants, organophosphate flame retardants (OPFRs) have been widely used and further detected in multiple environmental media. However, municipal landfill leachates, an important source of contamination of OPFRs to aquatic environment, have not been fully understood, especially in a developing country like China. Thus, the occurrence, aqueous removal efficiency, environmental emission, and risk assessment of 10 OPFRs were investigated in leachates from six municipal landfills across China. The results indicated that except triethyl phosphate (TEP), the remaining 9 OPFRs were detected in both raw and final leachates with different frequencies higher than 33.3%. The range of total concentrations of OPFRs (ΣOPFRs) across China was 29.0-437 and 0.652-32.4 μg L in raw and final leachates, respectively. Tris(2-chloroethyl) phosphate (TCEP) was the dominant species and accounted for 78.5% and 85.8% of average ΣOPFR concentration in raw and final leachates, respectively. This may be because TCEP is the most prevalently used OPFR in China. The overall aqueous removal efficiency of ΣOPFRs across China ranged from 57.7% to 99.8%. Tris(2-butoxyethyl) phosphate was the most removed species (98.8%), whereas TCEP was the least removed species (91.5%). The annual emissions of ΣOPFRs discharged into the aquatic environment from municipal landfills across China were estimated to be between 170 and 7094 g. Further risk assessment based on risk quotient values in the final leachates showed that most OPFRs posed negligible risk except TCEP (medium and high risk) and tributyl phosphate (medium risk).

关键词： Aqueous removal efficiency environmental emission Landfill leachates Occurrence Organophosphate flame retardants Risk assessment

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Efficient and stable direct air capture with amine-functionalized MIL-100(Cr) metal-organic framework

Environmental Functional Materials

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environmental Functional Materials 2025年

作者： Mengru Sun Meng Zhao Leyu Zhao Qiang wang Jinzhu Ma Hong He College of Environmental Science and Engineering Beijing Forestry University Beijing 100083 P. R. China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China

Metal–organic frameworks (MOFs) are promising for Direct Air Capture (DAC) due to their tunable pore structures, large surface areas, and chemical functionalization. Amine-functionalized MOFs significantly enhance CO 2 adsorption, yet most studies focus on adsorption capacity, with limited research on the impacts of water vapor and oxidative stability in practical DAC applications. Herein, MIL-100(Cr) was modified with polyethyleneimine (PEI), tetraethylenepentamine (TEPA), and diethanolamine (DEA) via impregnation, and their CO 2 capture performance under DAC conditions was systematically evaluated, including adsorption capacity, cyclic stability, water resistance, and oxidative stability. PEI-modified MIL-100(Cr) exhibited the best CO 2 adsorption capacity, achieving 1.21 mmol g -1 at the same level of amine incorporation and retained over 90% of its initial capacity after 20 cycles. Under humid conditions, the CO 2 adsorption performance of solid amine materials was further improved, due to the enhanced utilization of amine sites, particularly increased accessibility of secondary amines. Furthermore, the PEI-modified MIL-100(Cr) exhibited superior oxidative stability compared to TEPA-modified adsorbents. This study provides valuable insights for optimizing MOF-based adsorbents in practical DAC applications.

关键词： Direct air capture MOF-based solid amine absorbents Impact of water vapor Oxidation stability

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