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Rapid reduction of air pollution and short-term exposure risks in China

Journal of Environmental Sciences 2025年第3期149卷 126-138页

作者： Hao Fan Chuanfeng Zhao Yikun Yang Xingchuan Yang State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China Laboratory for Climate and Ocean-Atmospheric Studies Department of Atmospheric and Oceanic SciencesSchool of PhysicsPeking UniversityBeijing 100871China College of Resource Environment and Tourism Capital Normal UniversityBeijing 100048China

With the continuous control of anthropogenic emissions,China’s air quality has improved significantly in recent *** this background,research on how the short-term exposure risks caused by air pollution in China have changed is *** study utilized hourly concentration data from ground observation stations and the official air quality guidelines of the Ministry of Ecology and Environment of China and the World Health Organization as standards to systematically investigate the spatiotemporal characteristics and short-term exposure risks of air pollution in China from 2015 to *** results indicate that various atmospheric pollutants except for ozone showed a decreasing trend ***,both single pollutant air pollution days(SAPDs)and multiple pollutant air pollution days(MAPDs)showed varying degrees of reduction within 15 and 25 days,*** was dominated mainly by excessive PM_(2.5)and PM_(10)pollutants,while MAPD was dominated mainly by excessive pollutant combinations,including PM_(2.5)+PM_(10),CO+PM_(2.5)+PM_(10),and SO_(2)+PM_(2.5)+PM_(10).As the concentration of atmospheric pollutants decreased,the total excess risk(ER)decreased yearly from 2015 to 2022,but there were significant regional ***,the ER is less than 0.25%in southern China,in the range of 0.25%-0.5%in the North China Plain and some cities in the northeast,and higher than 1%in the *** matter is currently the primary pollutant posing short-term exposure risk in China,especially due to the impact of sandstorm *** study indicates that China’s atmospheric cleaning action is significantly beneficial for reducing health risks.

关键词： Air pollution Emission-reduction Total excess risk Particulate matter China

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Hybrid energy harvesting systems for self-powered sustainable water purification by harnessing ambient energy

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Frontiers of Environmental Science & Engineering 2023年第10期17卷 1-16页

作者： Zhengyang Huo Young Jun Kim Yuying Chen Tianyang Song Yang Yang Qingbin Yuan Sang Woo Kim School of Environment and Natural Resources Renmin University of ChinaBeijing 100872China School of Advanced Materials Science and Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Institute of Scientific and Technical Information of China Beijing 100038China

The development of self-powered water purification technologies for decentralized applications is crucial for ensuring the provision of drinking water in resource-limited regions. The elimination of the dependence on external energy inputs and the attainment of self-powered status significantly expands the applicability of the treatment system in real-world scenarios. Hybrid energy harvesters, which convert multiple ambient energies simultaneously, show the potential to drive self-powered water purification facilities under fluctuating actual conditions. Here, we propose recent advancements in hybrid energy systems that simultaneously harvest various ambient energies (e.g., photo irradiation, flow kinetic, thermal, and vibration) to drive water purification processes. The mechanisms of various energy harvesters and point-of-use water purification treatments are first outlined. Then we summarize the hybrid energy harvesters that can drive water purification treatment. These hybrid energy harvesters are based on the mechanisms of mechanical and photovoltaic, mechanical and thermal, and thermal and photovoltaic effects. This review provides a comprehensive understanding of the potential for advancing beyond the current state-of-the-art of hybrid energy harvester-driven water treatment processes. Future endeavors should focus on improving catalyst efficiency and developing sustainable hybrid energy harvesters to drive self-powered treatments under unstable conditions (e.g., fluctuating temperatures and humidity).

关键词： Piezocatalysis Solar energy Waste heat Decentralized water treatment Point-of-use Nanogenerator

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基于文献回顾的有色金属冶炼废渣的特征、资源化途径及其安全利用评价

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Journal of Central South University 2024年第4期31卷 1178-1196页

作者：徐则林姚佳斌付融冰 Centre for Environmental Risk Management and Remediation of Soil and Groundwater Tongji UniversityShanghai 200092China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

冶炼废渣作为冶炼过程中产生的工业副产物,由于其缺乏安全、合理的防护和管理措施可能导致环境问题。通过全面分析近年来发表的相关文献,本文对有色金属冶炼废渣的特性、资源化利用途径及安全利用评价等方面的最新研究进展进行了介绍。... 详细信息

冶炼废渣作为冶炼过程中产生的工业副产物,由于其缺乏安全、合理的防护和管理措施可能导致环境问题。通过全面分析近年来发表的相关文献,本文对有色金属冶炼废渣的特性、资源化利用途径及安全利用评价等方面的最新研究进展进行了介绍。研究结果表明,不同的原生精矿、冶炼条件和冶炼类型决定了冶炼废渣的化学和矿物学特征。此外,冶炼废渣在各种资源化利用中表现出极高的灵活性,不仅可以用于金属回收和建筑材料,还可以作为农业肥料和修复剂。同时,本文强调了在各种利用情景下对废渣进行安全性评估的重要性,以降低其潜在环境风险。此外,本文还强调了未来的研究方向,包括建立一种综合且量化的土渣混合体中重金属环境风险评价方法,以及探索更多创新的冶炼废渣资源化利用方法。综上所述,本文对于推动冶炼废渣在环境保护和资源可持续利用方面的研究有重要意义。

关键词：冶炼废渣有色金属废渣特征资源化利用途径安全利用评价

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The adsorption effect of aquaculture residual feed on heavy metals and its impact on microbial metabolism of feed

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Ecological Processes 2024年第2期13卷 246-259页

作者： Sufeng Wang Zijng Wang Wen Zhang Jingshan Li Mingyang Lin Li Chen State Key Laboratory of Metastable Materials Science and Technology Hebei Key Laboratory of Heavy Metal Deep‑Remediation in Water and Resource ReuseYanshan UniversityQinhuangdao 066004HebeiPeople’s Republic of China Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province College of Biology and Environmental EngineeringZhejiang Shuren UniversityHangzhou 310015ZhejiangPeople’s Republic of China Hebei Ocean&Fisheries Science Research Institute Qinhuangdao 066200HebeiPeople’s Republic of China

Background Intensive and large-scale aquaculture has a high biological density,and a large amount of artificial feed must be *** a result,residual feed would be discharged into natural water bodies with water *** to heavy metal pollution in surface water,residual feed may adsorb heavy metals in the water,affecting the subsequent microbial degradation of feed and the restoration of the water *** combined ecological impacts of these two types of pollution urgently need to be *** This study explored the adsorption effect of residual feed on heavy metals and its impact on microbial degradation of residual *** results showed that both the insoluble component(mainly fiber,ash,and ether extract,abbreviated as FAE)and soluble component(soluble protein and starch)of the feed had adsorption effects on heavy *** the salinity increased,the adsorption capacity of Cu^(2+)and Cd^(2+)decreased,while the adsorption effect on Pb^(2+)was not changed *** adsorption of heavy metals by residual feed could affect the biological degradation of residual *** residual feed could adsorb heavy metals and bacterial cells simultaneously,forming FAE-B(bacteria)-S(starch)-Pr(protein)-metal adsorption *** adsorption effect could reduce the negative impact of heavy metals on microbial degradation of residual *** simulated degradation experiments in actual water bodies also confirmed ***,the accumulation of heavy metals in residual feed may bring negative effects,such as being consumed by aquatic organisms and entering the food *** The results of this study provide a basis for the collection and centralized treatment of residual feed in aquaculture,as well as the control and remediation of residual feed pollution in natural water bodies.

关键词： Residual feed Adsorption complex Feed pollution Heavy metal

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The performance and mechanism of iron-mediated chemical oxidation:Advances in hydrogen peroxide,persulfate and percarbonate oxidation

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Journal of Environmental Sciences 2023年第6期128卷 181-202页

作者： Mengqi Han Hui Wang Wei Jin Wenhai Chu Zuxin Xu State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Ministry of Education Key Laboratory of Yangtze River Water Environment Tongji UniversityShanghai 200092China International Joint Research Center for Sustainable Urban Water System Tongji UniversityShanghai 200092China

Many studies have successfully built iron-mediatedmaterials to activate or catalyze Fentonlike reactions,with applications in water and wastewater treatment being ***,the developed materials are rarely compared with each other regarding their performance of organic contaminant *** this review,the recent advances of Fentonlike processes in homogeneous and heterogeneous ways are summarized,especially the performance and mechanism of activators including ferrous iron,zero valent iron,iron oxides,iron-loaded carbon,zeolite,and metal organic framework ***,this work mainly compares three O-O bond containing oxidants including hydrogen dioxide,persulfate,and percarbonate,which are environmental-friendly oxidants and feasible for in-situ chemical *** influence of reaction conditions,catalyst properties and benefits are analyzed and *** addition,the challenges and strategies of these oxidants in applications and the major mechanisms of the oxidation process have been *** work can help understand the mechanistic insights of variable Fenton-like reactions,the role of emerging iron-based materials,and provide guidance for choosing appropriate technologies when facing real-world water and wastewater applications.

关键词： Fenton-like reactions Iron-based catalyst Activation mechanism Chemical oxidation

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Improved atmospheric mercury simulation using updated gas-particle partition and organic aerosol concentrations

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Journal of Environmental Sciences 2022年第9期34卷 106-118页

作者： Kaiyun Liu Qingru Wu Shuxiao Wang Xing Chang Yi Tang Long Wang Tonghao Liu Lei Zhang Yu Zhao Qin’geng Wang Jinsheng Chen State Key Joint Laboratory of Environment 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 Atmospheric Environment Guangdong provincial academy of environmental scienceGuangzhou 510045China China National Environmental Monitoring Centre Beijing 100012China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing210023China Center for Excellence in Regional Atmos.Environ. Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

The gaseous or particulate forms of divalent mercury(HgⅡ) significantly impact the spatial distribution of atmospheric mercury concentration and deposition flux(FLX). In the new nested-grid GEOS-Chem model, we try to modify the HgⅡ gas-particle partitioning relationship with synchronous and hourly observations at four sites in China. Observations of gaseous oxidized Hg(GOM), particulate-bound Hg(PBM), and PM 2.5 were used to derive an empirical gas-particle partitioning coefficient as a function of temperature( T) and organic aerosol(OA) concentrations under different relative humidity(RH). Results showed that with increasing RH, the dominant process of HgⅡ gas-particle partitioning changed from physical adsorption to chemical desorption. And the dominant factor of HgⅡ gas-particle partitioning changed from T to OA concentrations. We thus improved the simulated OA concentration field by introducing intermediate-volatility and semi-volatile organic compounds(I/SVOCs) emission inventory into the model framework and refining the volatile distributions of I/SVOCs according to new filed tests in the recent literatures. Finally, normalized mean biases(NMBs) of monthly gaseous element mercury(GEM), GOM, PBM, WFLX were reduced from-33%–29%, 95%–300%, 64%–261%, 117%–122% to-13%–0%,-20%–80%,-31%–50%,-17%–23%. The improved model explains 69%–98% of the observed atmospheric Hg decrease during 2013–2020 and can serve as a useful tool to evaluate the effectiveness of the Minamata Convention on Mercury.

关键词： Nested GEOS-Chem model HgⅡgas-particle partitioning Organic aerosol Atmospheric mercury Mercury deposition flux

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New insights into different surfactants’impacts on sludge fermentation:Focusing on the particular metabolic processes and microbial genetic traits

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Frontiers of Environmental Science & Engineering 2022年第8期16卷 221-234页

作者： Jingyang Luo Shiyu Fang Wenxuan Huang Feng Wang Le Zhang Fang Fang Jiashun Cao Yang Wu Dongbo Wang Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of EducationHohai UniversityNanjing 210098China College of Environment Hohai UniversityNanjing 210098China State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China College of Environmental Science and Engineering Hunan UniversityChangsha 410082China

Surfactants were expected to exhibit positive effects on the waste activated sludge(WAS)***,the systematic comparison of different categories of surfactants on the WAS fermentation and the functional mechanisms,especially microbial metabolic traits,have not yet been precisely *** study revealed the positive effects of different surfactants on the volatile fatty acid(VFA)production,which followed the order of alkyl polysaccharides(APG)>sodium dodecylbenzene sulfonate(SDBS)>hexadecyl trimethyl ammonium bromide(HTAB).Mechanistic exploration found that the presence of different surfactants improved solubilization and hydrolysis steps,and then contributed to the subsequent acidification with different *** functional microorganisms associated with VFA generation were enriched in surfactant-conditioned *** analysis further indicated that the key genes involved in the particular process of VFA generation were *** simultaneous bioavailable substrate improvement,functional bacterial enrichment,and metabolic activity upregulation induced by different surfactants jointly contributed to VFA promotion during WAS *** study could provide a comprehensive realization of surfactants’impacts on theWAS fermentation process,and more importantly,it reminded the public to discern the distinct interplaying effects induced by different chemicals in regulating the WAS disposal and resource recovery.

关键词： Waste activated sludge(WAS) Volatile fatty acids(VFA) Surfactant types Functional microorganisms Metabolic activity upregulation

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Resistance of Biological Magnetic Ion Exchange Resin to Norfloxacin on the Advanced Treatment of Wastewater

SSRN

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SSRN 2024年

作者： Han, Liqin Shan, Cong Shuang, Chendong Xu, Shanshan Zhou, Qing Ji, Rong Li, Aimin Pan, Yang State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

In this work, a biological magnetic anion exchange (B-MAEX) system was established for removal of dissolved organic carbon (DOC) and triclosan in advanced treatment of wastewater. Activated sludge (AS) system was employed for comparison in the same experimental conditions. In AS system, the presence of norfloxacin had no significant impact on DOC removal at concentrations below 5.00 mg/L. But DOC removal decreased from 43±8% to 16±5% as norfloxacin concentration increased from 5.00 to 50.00 mg/L. Triclosan removal was found to be more susceptible to norfloxacin compared to DOC removal, with the removal decreasing from 22±8% to 12±8% as norfloxacin concentration increased from 0.05 to 0.50 mg/L. Further reduction in triclosan removal to 3±5% was observed with norfloxacin raised to 50.00 mg/L. In contrast to the AS system, the B-MAEX system demonstrated significantly enhanced removal of both DOC and triclosan at equivalent norfloxacin concentrations. With norfloxacin increasing from 5.00 to 50.00 mg/L, DOC removal dropped from 71±12% to 60±11%. Triclosan removal decreased from 70±5% to 64±6% when norfloxacin concentration increased from 0.50 to 5.00 mg/L. Even at norfloxacin concentration of 50.00 mg/L, triclosan removal remained 61±12%. The enhanced resistance of the B-MAEX system to norfloxacin could be attributed primarily to its elevated biological activity and a more diverse microbial community, suggesting the potential application on the advanced wastewater treatment. © 2024, The Authors. All rights reserved.

关键词： Ion exchange resins

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A Novel Self-Sourced Extracellular Polymeric Substances-Doped Residual Sludge-Based Biochar Loaded with Nano Zero-Valent Iron Reinforces Anaerobic Digestion Methanogenesis: Performance and Community Structure Succession

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SSRN 2024年

作者： Li, Jibin Wu, Siqi Zhang, Weiming Pan, Bingcai Hua, Ming State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China

Anaerobic digestion is an effective wastewater energization technology, but suffers from low energy conversion efficiency. In this study, a novel composite of extracellular polymeric substances-doped residual sludge-based biochar loaded with nano zero-valent iron (NZVI@EPSBC) was successfully prepared, which had a significant promotion effect on anaerobic digestion methanogenesis. In comparison to the control, the methane yield with 100 mg/L NZVI@EPSBC was raised by approximately 1.4-fold. The NZVI@EPSBC did not significantly change the morphology of the inoculated granular sludge, but induced the secretion of proteins and humic substances in the extracellular EPS, which are beneficial for carbon conversion and extracellular electron transport at the microscopic scale. Meanwhile, the quantitative analysis of the electron transport system also confirmed that NZVI@EPSBC could significantly improve the electron transfer efficiency in microbial respiratory chain throughout the experimental cycle, in which the highest respiratory efficiency increase of 26.51% at 48 h. Taxonomic analysis of microbial communities showed that NZVI@EPSBC exhibited complete retention of bacteria and archaea compared to the raw sludge, while realizing an efficient cooperative pattern of syntrophic bacteria by regulating the relative abundance of specific functional bacteria, like Anaerolineaceae and Methanosaeta. Overall, the study offers a valuable strategy for achieving resourcefulness of residual sludge and extracellular polymeric substances along with facilitating efficient energy recovery from wastewater. © 2024, The Authors. All rights reserved.

关键词： Anaerobic digestion

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Recovery of nitrogen and phosphorus from water by ball-milled biochar composite supported by acid mine drainage sludge

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Journal of Industrial and Engineering Chemistry 2025年 149卷 509-520页

作者： Ma, Zijie Zhao, Zhipeng Pan, Yuegui Lei, Wei Faheem, Muhammad Feng, Qianwei Zhang, Xueyang Wang, Bing College of Resources and Environmental Engineering Guizhou University Guiyang550025 China Guizhou Institute of Water Resource Science Guiyang550002 China Department of Civil Infrastructure and Environmental Engineering Khalifa University of Science and Technology Abu Dhabi127788 United Arab Emirates Key Laboratory of Karst Georesources and Environment Ministry of Education Guiyang550025 China Jiangsu Key Laboratory of Industrial Pollution Control and Resource Reuse School of Environmental Engineering Xuzhou University of Technology Xuzhou221018 China

Excessive nitrogen and phosphorus can lead to the eutrophication of water. Biochar, derived from agricultural and forestry waste, is effective for water eutrophication control, but its adsorption performance requires enhancement through process optimization. To explore efficient methods for the recovery of nitrogen and phosphorus, pinecone biochar was mixed with acidic mine drainage (AMD) sludge through ball milling to produce modified pinecone biochar (MPB). Batch adsorption experiments and SEM-EDS, FTIR, and XRD tests were employed to investigate co-adsorption performance and mechanisms of MPB for ammonium and phosphate. The results showed that low-temperature pyrolysis (300 °C) facilitated the adsorption of ammonium and phosphate by MPB. The adsorption process followed the Elovich model, suggesting that heterogeneous chemisorption was the primary mechanism. Ammonium adsorption followed the Langmuir model, and phosphate adsorption followed the Freundlich model. The recovery rates for ammonium and phosphate by MPB reached 29.58 % and 96.19 %, respectively. Site energy analysis confirmed that ion exchange and surface precipitation were the main adsorption mechanisms. The presence of Fe3+ and Al3+ in AMD sludge facilitated phosphate precipitation, while the increased functional group content in MPB enhanced ammonium adsorption. This study provides a potential pathway for the sustainable use of forestry waste and industrial waste as well as for nitrogen and phosphorus recovery. © 2025 The Korean Society of Industrial and Engineering Chemistry

关键词： Eutrophication

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