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Insight on prioritization of antibiotics in China, their occurrence, and removal by different wastewater treatment technologies

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Discover environment 2024年第1期2卷 1-34页

作者： Bavumiragira, Jean Pierre Eheneden, Iyobosa Yin, Hailong Mumbi, Anne Wambui Quoie, Gerald D. S. Uyisaba, Pascaline Wang, Rongchang Zhao, Jianfu Institute of Environment for Sustainable Development College of Environmental Science and Engineering Tongji University Shanghai 200092 China Key Laboratory of Yangtze River Water Environment (MoE) Tongji University Shanghai 200092 China Institute of Biofilm Technology Key Laboratory of Yangtze Aquatic Environment (MOE) State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai 200092 China Harper Adams University Edgmond Newport TF10 8NB United Kingdom College of Medicine and Health Sciences University of Rwanda Kigali Rwanda

China still dominates all other nations as the world's most significant producer and consumer of antibiotics. Antibiotic misuse and overuse have been qualitatively and quantitatively documented in China recently. Antibiotic misuse has alarmed the Chinese population because some antibiotics persist in the environment and adversely affect human health and other non-target organisms. Antibiotic priority setting has been considered the best monitoring tool that is also affordable and time-efficient. Therefore, this article aims to assess the status methods of antibiotic prioritization within ten years ago years (2012–2022) in China and its prevalence and removal by conventional wastewater treatment facilities. Twenty-six priority antibiotics in China may need more attention, according to a recent prioritization assessment. According to other nations, the outcomes of prioritization vary from one nation to another. However, the same antibiotics are frequently reported despite applying various prioritization techniques (method). Their prevalence and frequent detection in China’s environmental media indicate that conventional treatment plants cannot remove them from effluents altogether. Their removal patterns vary from wastewater treatment plant (WWTP) to another and are affected by different factors, including pH, physical–chemical properties of the antibiotic compound, temperature, sludge retention time (SRT), hydraulic retention time (HRT), and the amount of microorganism present. © The Author(s) 2024.

关键词： Antibiotics Occurrence Prioritization Removal Wastewater treatment

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Displacement Efficiency of Intermittent Renewable Energy Generation in China

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SSRN 2023年

作者： Zhu, Ziao Xu, Zhongwen Zhang, Bing State Key Laboratory of Pollution Control & Resource Reuse School of Environment Nanjing University 163 Xianlin Avenue Nanjing210023 China Center for Environmental Management and Policy China

As the world’s largest carbon emitter, China has made significant investments in wind and solar power. However, the extent to which these intermittent renewable energy sources can replace the predominant thermal generation remains uncertain. This study examines the displacement of fossil-fuel-generated electricity by intermittent energy sources in China from 2011 to 2020. The results indicate that a 1% increase in intermittent renewable generation leads to a decrease of approximately 0.03% in thermal generation. A rough estimate suggests that a 1% rise in renewable generation results in carbon emission reduction benefits of about 645 million USD. The impact of wind and solar generation on the operation of thermal units varies due to disparities in penetration rates and supply patterns. Evidence underscores the absence of co-benefits from the ultra-high voltage transmission network in improving the displacement efficiency of intermittent renewable energy, primarily attributed to the relatively modest proportion of renewable energy electricity transmitted through UHV lines. These findings highlight the need for tailored investment plans based on the characteristics of wind and solar resources, the importance of alternative measures to enhance grid flexibility, and the imperative of integrating a diverse range of policy instruments to effectively facilitate the penetration rate of intermittent renewable energy sources. © 2023, The Authors. All rights reserved.

关键词： Fossil fuels

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Biodegradation of organic micropollutants by anoxic denitrification: Roles of extracellular polymeric substance adsorption, enzyme catalysis, and reactive oxygen species oxidation

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Free Radical Biology and Medicine 2025年 233卷 S20-S20页

作者： Siqi Xu Rui Li Yang Liao Jiyong Bian Ruiping Liu Huijuan Liu Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing China

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Mechanisms of Cr(Vi) Adsorption and Reduction on Hss-Fe(Iii) Coprecipitates: Synergistic/Antagonistic Effects Induced by Different Hss

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SSRN 2024年

作者： Wang, Hui Gong, Xueying Zhu, Jinqi Barnie, Samuel Yuan, Ying Xi, Beidou Tan, Wenbing Chen, Honghan Zhang, Jia State Key Laboratory of Environmental Criteria and Risk Assessment State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing100012 China Beijing Key Laboratory of Water Resources & Environmental Engineering China University of Geosciences Beijing100083 China Department of Water and Sanitation University of Cape Coast Cape Coast Ghana

To clarify the mechanisms of Cr(VI) attenuation in a subsurface environment enriched in natural organic matter and iron minerals, FA-Fe(III) coprecipitates (FFCs) were synthesized to simulate HSs-Fe(III) coprecipitates. The Cr(VI) adsorption and reduction induced by different types of HSs were compared with those on HA-Fe(III) coprecipitates (HFCs) investigated in an earlier study. The adsorption of Cr(VI) onto both FFCs and HFCs was attributed to the formation of inner- and outer-sphere complexes by Fe(III) and HSs. However, the association of HSs and Fe(III) sheltered certain FeOH adsorption sites and enhanced the electrostatic repulsion to Cr(VI), thus decreasing the adsorption capability. The reduction of Cr(VI) involved two parallel processes, namely inductive and intrinsic reduction, with the final effect depending on the decrease in the number of inherent reduction sites (e.g., phenol) and increase in the number of activated sites (e.g., hydroxyl). Compared to HA, the hydroxyl within FA was more easily activated by Fe(III) (hydr)oxides (even by the weakly inductive Fe(III) cations) because of FA’s smaller molecular size. Consistent synergistic effects were thus identified in both the Fh- and FA-like FFCs, but only in the Fh-like HFCs. This study can have important applications in the remediation of Cr-contaminate sites. © 2024, The Authors. All rights reserved.

关键词： Coprecipitation

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simulation of Co2 Flux and Evaluation of Carbon Neutrality Potential at the Neighborhood Scale in Beijing with Multi-Source Data

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SSRN 2025年

作者： Luo, Wen-Rong Che, Hui-Zheng Miao, Shi-Guang Dou, Jun-Xia Zheng, Ying-Qi Zhou, Yu-Yu Su, Zhi-Min Wu, Ye Wang, De Yi, Xin Gui, Ke Zheng, Yu Li, Lei Zhang, Xiao-Ye Nanjing210044 China State Key Laboratory of Severe Weather Key Laboratory of Atmospheric Chemistry of CMA Chinese Academy of Meteorological Sciences Beijing100081 China Beijing100089 China Beijing100029 China Department of Geography The University of Hong Kong 999077 Hong Kong State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University Beijing100084 China College of Architecture and Urban Planning Tongji University Shanghai200092 China Tsinghua University China

The urban block serves as the fundamental unit for fine-scale management of urban carbon emissions, playing a critical role in achieving urban carbon neutrality and sustainable development. Carbon source-sink data at the urban block scale exhibit significant spatial heterogeneity, and accurate estimation of CO2 fluxes helps to better understand the relationship between urban carbon processes and both anthropogenic and natural factors. This study utilized multi-source data and the SUEWS urban land surface model to simulate CO2 fluxes at high temporal (hourly) and spatial (20m) resolution in the typical mixed-use areas of Haidian and Chaoyang stations in Beijing. Carbon fluxes from traffic, buildings, human metabolism, soil, and vegetation were quantified for the years 2016, 2019, and 2020. The results show that the SUEWS model effectively captures the temporal and spatial dynamics of CO2 flux in the study area. The multi-year average CO2 flux at Chaoyang and Haidian stations was 28.17 and 12.87 kg CO2 m−2 yr−1, respectively. Road traffic accounted for the largest share of CO2 emissions, contributing more than 50%, followed by emissions from buildings and human metabolism. The study also evaluated the potential for carbon reduction in urban blocks under future low-carbon policies. Under the moderate emission scenario SSP2-4.5, along with the implementation of strong policy measures, including 80% rooftop greening and electric vehicle adoption, carbon emissions in urban blocks could be reduced by approximately 60%. This study provides essential data and technical support for urban CO2 reduction through fine-scale CO2 flux calculations. © 2025, The Authors. All rights reserved.

关键词： Anthropogenic

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Ozone Production Sensitivity Analysis for the Chengdu Plain Urban Agglomeration Based on a Muti-Site and Two-Episode Observation

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SSRN 2024年

作者： Zhou, Ming Liu, Yuhan Lu, Keding Yu, Dan Li, Chunmeng Zhai, Tianyu Yang, Suding Tan, Zhaofeng Ma, Xuefei Li, Xin Dong, Huabin Zeng, Limin Chen, Shiyi Chen, Junhui Tan, Qinwen Song, Danlin Zhang, Xiaoling Zhang, Yuhang State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing China China Institute of Atomic Energy Beijing China Center for Environmental Metrology National Institute of Metrology Beijing China State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation Chinese Research Academy of Environmental Sciences Beijing China Sichuan Academy of Environmental Sciences Chengdu China Chengdu Academy of Environmental Sciences Chengdu China Plateau Atmosphere and Environment Key Laboratory of Sichuan Province School of Atmospheric Sciences Chengdu University of Information Technology Chengdu China

Chengdu Plain Urban Agglomeration (CPUA) is one of the most serious areas suffering ozone pollution in China. A comprehensive field observation focused on the ozone production rate and its sensitivity was conducted at CPUA in the summer of 2019. Six sampling sites were set and two ozone pollution episodes were recognized. The daily maximum 8-h average (MDA8) O3 concentration reached 137.9 ppbv in the urban sites during the ozone pollution episode. Peak concentration of O3 was closely related to intense solar radiation, high temperatures, and precursor emissions. The OH-HO2-RO2 radical chemistry and ozone production rate (P(O3)) was calculated using an observation-based model (OBM). The daily peak OH concentration varied in the range of 3-13×106 molecules cm−3, and peak HO2 and RO2 were in the range of 2–14×108 molecules cm−3 during ozone pollution episodes. During the ozone pollution episode, the average maximum of P(O3) in suburban sites (about 30 ppbv h-1.) was compared with urban sites, and the maximum of P(O3) was 18 ppbv h-1 in rural sites. The relative incremental reactivity (RIR) results demonstrate that it was a VOC-limited regime in the central urban area of Chengdu, with NOx suppression effect in some regions. In the southern neighboring suburb of Chengdu, it was VOC-limited as well. However, the northern suburban area was a transition region. In the remote rural areas of the southern CPUA, it was highly NOx-limited. Local ozone production driven by the photochemical process is crucial to the ozone pollution formation in CPUA. The geographically differentiated recognition of the ozone regime found by this study can help to tailor control strategies for local conditions and avoid the negative effects of a one-size-fits-all approach. © 2024, The Authors. All rights reserved.

关键词： Molecules

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Spatial Supply-Demand Balance of Green Space in the Context of Urban Waterlogging Hazards and Population Agglomeration

SSRN

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SSRN 2022年

作者： Yang, Junwen Duan, Cuncun Wang, Hao Chen, Bin State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University 100875 China College of Architecture and Civil Engineering Beijing University of Technology 100124 China

Urban green space contributes significantly to urban settlements regarding the frequent rainstorm events and population agglomeration issues, while there is a lack of understanding of the spatial match between green space supply and social demand. In this paper, an integrated evaluation framework concerning the supply-demand balance of urban green space was established. With a case study of Beijing, the urban waterlogging risk was simulated with ICM model, considering the specific demand criterion of waterlogging hazards and population needs. Then, the street-scale supply-demand balance of existing and future urban green space for the demands was quantified with Two-step Floating Catchment Area method. By comparison of the street-level balance in large rainstorms and populated areas, we finally identified the key locations where green space supply should be strengthened in Beijing. This study may provide an integrated evaluation of green space accessibility and a solid foundation for refined urban land-use planning strategies. © 2022, The Authors. All rights reserved.

关键词： Hazards

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Investigation on the role of ·OH for BPA removal in coastal sediments: The important mediation of low reactivity Fe(II)

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Chemosphere 2024年 353卷 141575页

作者： Yue, Jingyuan Hu, Xiaojin Xie, Huijun Hu, Zhen Wu, Haiming Zhang, Jian Sun, Bo Wang, Lushan Environment Research Institute Shandong University Qingdao266237 China Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse Shandong Key Laboratory of Environmental Processes and Health School of Environmental Science and Engineering Shandong University Qingdao266237 China State Key Laboratory of Microbial Technology Institute of Microbial Technology Shandong University Shandong Qingdao266237 China

Bisphenol A (BPA) in seawater tends to be deposited in coastal sediments. However, its degradation under tidal oscillations has not been explored comprehensively. Hydroxyl radicals (·OH) can be generated through Fe cycling under redox oscillations, which have a strong oxidizing capacity. This study focused on the contribution of Fe-mediated production of ·OH in BPA degradation under darkness. The removal of BPA was investigated by reoxygenating six natural coastal sediments, and three redox cycles were applied to prove the sustainability of the process. The importance of low reactivity Fe(II) in the production of ·OH was investigated, specifically, Fe(II) with carbonate and Fe(II) within goethite, hematite and magnetite. The degradation efficiency of BPA during reoxygenation of sediments was 76.78–94.82%, and the contribution of ·OH ranged from 36.74% to 74.51%. The path coefficient of ·OH on BPA degradation reached 0.6985 and the indirect effect of low reactivity Fe(II) on BPA degradation by mediating ·OH production reached 0.5240 obtained via partial least squares path modeling (PLS-PM). This study emphasizes the importance of low reactivity Fe(II) in ·OH production and provides a new perspective for the role of tidal-induced ·OH on the fate of refractory organic pollutants under darkness. © 2024 Elsevier Ltd

关键词： Degradation

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Detrimental role of residual surface acid ions on ozone decomposition over Ce-modified γ-MnO2under humid conditions

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Journal of environmental Sciences 2020年第5期32卷 43-53页

作者： Xiaotong Li Jinzhu Ma Changbin Zhang Runduo Zhang Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China

In the study,the catalyst precursors of Ce-modifiedγ-MnO2 were washed with deionized water until the pH value of the supernatant was 1,2,4 and 7,and the obtained catalysts were named *** space velocity of 300,000 hr-1,the ozone conversion over the pH=7 catalyst under dry conditions and relative humidity of 65%over a period of 6 hr was 100%and 96%,***,the ozone decomposition activity of the pH=2 and 4 catalysts distinctly decreased under relative humidity of 65%compared to that under dry *** physical and chemical characterization demonstrated that the residual sulfate ions on the pH=2 and 4 catalysts decreased their hydrophobicity and then restrained humid ozone decomposition *** pH=2 and 4 catalysts had inferior resistance to high space velocity under dry conditions,because the residual sulfate ion on their surface reduced their adsorption capacity for ozone molecules and increased their apparent activation energies,which was proved by temperature programmed desorption of O2 and kinetic ***-term activity testing,X-ray photoelectron spectroscopy and density functional theory calculations revealed that there were two kinds of oxygen vacancies on the manganese dioxide catalysts,one of which more easily adsorbed oxygen species and then became *** study revealed the detrimental effect of surface acid ions on the activity of catalysts under humid and dry atmospheres,and provided guidance for the development of highly efficient catalysts for ozone decomposition.

关键词： Ozone decomposition Manganese dioxide Surface acid ions Moisture-resistant property Oxygen vacancy

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Effects of Counterion Type on Standard Anion Exchange Resin-Based Selective Arsenic Removal Process for Polluted Groundwater

SSRN

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SSRN 2022年

作者： Li, Shida Yang, Xiaoying Zheng, Shaokui Duan, Shoupeng Zheng, Xiangnan Wang, Zhixuan School of Environment MOE Key Laboratory of Water and Sediment Sciences State Key Lab of Water Environment Simulation Beijing Normal University Beijing100875 China Environmental Simulation and Pollution Control South China Institute of Environmental Sciences Ministry of Ecology and Environment No. 18 Ruihe Road Guangzhou510530 China

This study demonstrated the remarkable effect of counterion type (i.e., chloride or bicarbonate) on selective arsenic (As) removal from polluted groundwater by the combination of a standard anion exchange resin (standard AER) column and spent brine electrocoagulation (or chemical coagulation) during long-term cyclic operation. Either chloride or bicarbonate counterion resulted in successful preference for trace arsenate over sulfate during the exhaustion of a standard AER column after its circular activation/regeneration by optimized binary brines;this process yielded quality product water during 18 exhaustion–regeneration cycles without brine replacement or purification. Furthermore, they both ensured selective As removal from As-rich spent brine by iron (Fe)- or aluminum (Al)-based chemical coagulation, and chloride counterion ensured selective As removal from As-rich spent brine by Fe- or Al-based electrocoagulation. However, high bicarbonate concentration in spent brine resulted in no significant Fe- or Al-based electrocoagulation reaction because of passivation film formation on the anode surface. Based on the differences in metal dosage, sludge production, and residual metal concentration, Fe-based electrocoagulation and chloride-based binary brine are recommended during the standard AER-based selective As removal process for polluted groundwater. Finally, the operational data over 114 exhaustion–regeneration cycles supported the stability and high As-selectivity of the combined process, thus providing a good solution for the disposal of spent brine that is frequently generated during the ion exchange process. © 2022, The Authors. All rights reserved.

关键词： Ion exchange

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