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Coordinated control of Fine-Particle and Ozone pollution by the Substantial Reduction of Nitrogen Oxides

Engineering 2022年第8期8卷 13-16页

作者： Biwu Chu Yan Ding Xiang Gao Junhua Li Tingyu Zhu Yunbo Yu 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 the Chinese Academy of Sciences Beijing 100049China Chinese Research Academy of Environmental Sciences Beijing 100012China State Environmental Protection Engineering Center for Coal-Fired Air Pollution Control Zhejiang UniversityHangzhou 310027China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

*** In recent years,the air quality in China has improved *** many cities,however,the concentration of fine particulate matter(PM_(2.5))remains higher than the secondary-level national ambient air quality standard(NAAQS level-2,35μg·m^(-3),GB3095-2012[1])and much higher than the first-level NAAQS(15μg·m^(-3),GB3095-2012[1])and the World Health Organization(WHO)air quality guidelines(5μg·m^(-3)).

关键词： pollution Ozone ambient

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A fine-scale atlas reveals the systematic imbalance between carbon emissions and economic benefits along value chain within China

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Science of the Total environment 2024年 957卷 177311页

作者： Xiong, Yiling Tian, Xin Kang, Ailin School of Environment Beijing Normal University Beijing100875 China State Key Laboratory of Water Environment Simulation Beijing Normal University Beijing100875 China Current affiliation: School of Environment State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University Beijing100084 China

In efforts to achieve the aspiring carbon mitigation goals, China is actively seeking to reconcile the economic development and carbon reduction with diverse regional conditions. Here, we firstly integrated a national-wide atlas on the labor division of production, and decomposed value added and carbon emission along China's domestic value chain during 2007–2017. We found that the value chain roles lead to a systematic imbalance between value added and carbon emissions across regions. Over 70 % of sufferers of the inequality were located at the north, most of which were in the upstream position to supply resource and energy intermediate products of higher on-site emissions and relatively less value added in comparison to the downstream manufacturing and service products production at the coastal regions. As a result, the northern inland suffered a great deal while part of coastal regions and southern inland were beneficiaries in the participation in domestic value chain. In particular, several regions inevitably undertake industries with higher emission intensity and less gains in a sound domestic industrial chain. These strongly call for a systematically policy- or price-based mechanism to explore fair strategy for emission reduction. © 2024 Elsevier B.V.

关键词： Low emission

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Direct Current Driven Persulfate Delivery and Activation for Heterogeneous Porous Media Remediation: Coupling Effects of Electric-Thermal-Chemical-Flow Fields

SSRN

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SSRN 2024年

作者： Geng, Zhuning Zheng, Di Qi, Zhen Xie, Qianli Li, Guanghe Zhang, Fang School of Environment State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University Beijing100084 China Beijing100015 China

Direct current (DC) has promising potential for persulfate delivery and activation in heterogeneous site remediation, yet requires deeper understanding. Here, we investigated the efficiency of DC for persulfate delivery and activation and compared with alternating current (AC). While AC electric field only influenced persulfate fate by Joule heating effect, DC electric field induced electrokinetic migration of persulfate and contaminants, as well as promoted persulfate activation with Joule heating and electrochemical reactions. DC system achieved 95% MCB removal which was 3.1 times of that in AC system using the same voltage input (60 V) with a velocity of 0.5 m/d. When the applied DC voltage increased from 20 V to 60 V (0.5-1.5 V/cm), persulfate activation pathway changed from electrode reactions to the coupled activation pathways of electrode, chemical and heat reactions, thus resulting in increasing MCB removal efficiency from 57% (20 V) to 95% (40 V and 60 V). The energy consumption with 40 V (11.6 kWh/g) was 2.6 times of that using 20 V (4.4 kWh/g), and dramatically increased to 11.7 times with 60 V (50.2 kWh/g). This study provides a new perspective on improving the efficiency of persulfate delivery and activation in heterogeneous sites remediation using DC-driven system. © 2024, The Authors. All rights reserved.

关键词： Chemical activation

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Comprehensive understanding of guest compound intercalated layered double hydroxides: Design and applications in removal of potentially toxic elements

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Critical Reviews in environmental Science and Technology 2023年第4期53卷 457-482页

作者： Cui, Shihao Peng, Yutao Yang, Xiao Gao, Xing Guan, Chung-Yu Fan, Beibei Zhou, Xue Chen, Qing Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation College of Resources and Environmental Sciences China Agricultural University Beijing China School of Agriculture Sun Yat-sen University Guangdong Shenzhen China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China State Key Laboratory for Pollution Control and Reuse School of Environmental Science and Engineering Tongji University Shanghai China Department of Environmental Engineering National I-Lan University Yilan Taiwan

Layered double hydroxides (LDHs) and LDHs-derived materials are emerging as potential engineered adsorbents for the protection of water environment. Particularly, LDHs intercalated with different guest compounds (GC-LDHs), which differ from traditional interlayer anions (such as Cl−, SO42−, NO3−, CO32−, and PO43−), are widely reported by recent studies showing their promising multifunctional roles in water purification. Herein, this review systematically presents the synthesis methods and characterization techniques of GC-LDHs and their application as adsorbents in removing potentially toxic elements (PTEs) from the aqueous phase. This review also elaborates on the important roles of complexation, chelation, precipitation, isomorphic substitution, and ion exchange in the process of PTE removal by GC-LDHs. Among them, compared with PTE cations, ion exchange is an additional mechanism for the removal of PTE oxyanions by GC-LDHs. Furthermore, the influence of pH, ionic strength, temperature, physiochemical properties of original LDHs and guest compounds on the GC-LDHs adsorption performance are also summarized. Finally, the development trends and future challenges related to GC-LDHs are proposed. © 2022 Taylor & Francis Group, LLC.

关键词： Ion exchange

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Occurrence, distribution and risk assessment of antibiotics at various aquaculture stages in typical aquaculture areas surrounding the Yellow Sea

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Journal of environmental Sciences 2023年第4期126卷 621-632页

作者： Jiachao Zhang Xuanrui Zhang Yang Zhou Qianfan Han Xiaoli Wang Chao Song Shuguang Wang Shan Zhao Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and EngineeringShandong UniversityQingdao 266237China Water Science and Environmental Engineering Research Center College of Chemical and Environmental EngineeringShenzhen UniversityShenzhen 518060China Qingdao Municipal Bureau of Ecology and Environment Qingdao 266003China Analysis and Test Center Qilu University of Technology(Shandong Academy of Sciences)Jinan 250014China

The pollution of antibiotics commonly existed throughout the entire aquaculture process,but the residues of antibiotics at different aquaculture stages have rarely been *** study investigated the occurrence,distribution and risk assessment of antibiotics at different aquaculture stages (the non-aquaculture stage,the early aquaculture stage,the middle aquaculture stage,and the late aquaculture stage) in two typical marine aquaculture areas(Mahegang River and Dingzi Bay) surrounding the Yellow *** and tetracyclines were commonly used antibiotics in the aquaculture of these areas with high detection frequencies (17%to 83%).Compared among four aquaculture stages,the highest concentration of antibiotics (9032.08 ng/L) in aquaculture ponds was detected at the late aquaculture *** the antibiotic pollution level of natural water was directly related to the aquaculture ***,at the aquaculture stages,the detection frequency of antibiotics in sediments was higher than that at the non-aquaculture *** on the correlation analysis,the concentration of main antibiotics in water showed a positive correlation with total nitrogen (p<0.05) and chlorophyll a (p<0.01),while it showed a negative correlation with salinity (p<0.01) in coastal water of the Dingzi *** to the risk assessment,with the development of aquaculture stages,the selection pressure of fluoroquinolones and tetracyclines on resistant bacteria had *** the ecological risks caused by sulfonamides and tetracyclines to aquatic organisms had also increased ***,this study may provide a reference for formulating regulatory policies regarding antibiotic use at different aquaculture stages.

关键词： Antibiotics Aquaculture stages Correlation analysis Risk assessment

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Comparing the costs and benefits of virgin and urban mining

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Journal of Management Science and Engineering 2022年第1期7卷 98-106页

作者： Xianlai Zeng Tongxin Xiao Guochang Xu Eva Albalghiti Guijuan Shan Jinhui Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China School of Forestry and Environmental Studies Yale UniversityNew HavenCT06511USA

Resource and environmental management are shaping our society and *** mining is rapidly becoming unsustainable as primary resources are in increasingly short supply and energy consumption continues to *** mining through a circular economy has emerged as a promising option for securing copper and aluminum ***,the sustainability and viability of this circular economy industry are heavily dependent on its ***,we demonstrate the economic benefits of urban mining for anthropogenic minerals:e-waste,end-of-life vehicles,waste wiring and *** material and cost flows associated with urban mining are deeply *** life cycle cost and cost-benefit analysis,the cost of obtaining one ton of copper or aluminum is found to be,on average,3,000 US$or 1,660 US$,which is significantly lower than the cost of virgin ***,in terms of the costs and benefits,copper may differ tremendously from aluminum depending on the type of anthropogenic *** additional regulations or policies enactment need to reinforce the urban mining and circular economy.

关键词： Circular economy Resource sustainability Cost-benefit analysis Urban mining Virgin mining

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Degradation of florfenicol in a flow-through electro-Fenton system enhanced by wood-derived block carbon(WBC)cathode

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Chinese Chemical Letters 2022年第11期33卷 4740-4745页

作者： Li Tian Qiongfang Zhuo Jincheng Lu Jingjing Liu Xiaofeng Xu Xiaolin You Manman Xu Bo Yang Junfeng Niu School of Environment and Civil Engineering Dongguan University of TechnologyDongguan 523808China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology(Sun Yat-sen University) Guangzhou 510275China

The flow-through electro-Fenton(EF-T)reactor with WBC cathode was designed to remove florfenicol(FF).The activated WBC cathode was prepared by facile carbonization and activation methods,and featured high specific surface area,natural multi-channel structure,abundant oxygen-containing groups,good hydrophilicity,and excellent O_(2)reducing *** cathode was located above Ti/Ru-IrO_(2)mesh anode.O_(2)evolved at the anode was carried to the inner wall of channel of WBC by the force of buoyancy and water flow,which increases oxygen source of H_(2)O_(2)generation at the *** flow-through system by using WBC electrode promote the mass transfer of O_(2)and *** production amount of H_(2)O_(2)at activated WBC was 32.2 mg/L,which was almost twice as much as that at non-activated WBC(15.0 mg/L).FF removal ratio in EF-T system was 98%,which was much higher than that of traditional flow-by electro-Fenton(EF-B,33%)or single electrooxidation system(EO,16%).EF-T system has the lowest energy consumption(4.367 kWh/kg)among the three electrochemical *** cathodic adsorption,anodic electrooxidation,and EF reaction are responsible for the degradation of *** five consecutive cycle experiments,FF removal ratio was still 98%,indicating WBC has the good stability.

关键词： Wood-derived block carbon Natural multi-channel structure Flow-through mode Electro-fenton Anodic oxygen

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Identifying priority areas of Four Major Chinese carps’ species in the Pearl River basin based on the MaxEnt model

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Watershed Ecology and the environment 2023年第1期5卷 18-23页

作者： Shao, Xiaojing Liu, Xing Cai, Jie Cai, Yanzi Cui, Baoshan Research Center for Monitoring and Environmental Sciences Taihu Basin & East China Sea Ecological Environment Supervision and Administration Authority Ministry of Ecology and Environment of the People's Republic of China Shanghai 200125 China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China

The Pearl River basin (PRB) is an important producing area and the gene pool of wild resources of Four Major Chinese carps (FMCC). However human activities and climate changes causes the area shrink of the river network in PRB, the pollution aggregation, the serious habitat destroy of aquatic organisms, and the threat of biological resources and their living environment. Based on the accurate location and distribution data of FMCC from the literature and the field survey report of 2015–2016, this study used the MaxEnt model to predict the hot spot distribution area of FMCC in PRB. The simulation results show that the distribution of FMCC in the PRB gradually increases from the upper reaches to the middle and lower reaches. According to the MaxEnt model, the hot spots of FMCC in the PRB are mainly distributed in the south reaches and the lower reaches of the southeast. The model simulation also demonstrates that the hottest spots for the distribution of FMCC species in the PRB are the Yujiang basin, the Qianjiang basin and the lower reaches of the Xijiang basin. This study can provide the scientific guidance for the protection and the restoration of FMCC species in the PRB. © 2022 The Authors

关键词： Biodiversity MaxEnt model Pearl River basin Prior conservation area

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Variation characteristics of fine particulate matter and its components in diesel vehicle emission plumes

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Journal of environmental Sciences 2021年第9期33卷 138-149页

作者： Xianbao Shen Jiateng Hao Lei Kong Yue Shi Xinyue Cao Jiacheng Shi Zhiliang Yao Xin Li Bobo Wu Yiming Xu Kebin He State Environmental Protection Key Laboratory of Food Chain Pollution Control Beijing Technology and Business UniversityBeijing 100048China Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry Beijing Technology and Business UniversityBeijing 100048China School of Ecology and Environment Beijing Technology and Business UniversityBeijing 100048China 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

A rapid reaction occurs near the exhaust nozzle when vehicle emissions contact the *** diesel vehicles were studied using a new multipoint sampling system that is suitable for studying the exhaust plume near the exhaust *** variation characteristics of fine particle matter(PM_(2.5)) and its components in diesel vehicle exhaust plumes were *** PM_(2.5) emissions gradually increased with increasing distance from the nozzle in the *** carbon emissions remained basically unchanged, organic carbon and total carbon(TC) increased with increasing *** concentrations of SO_(4)^(2-),NO_(3)^(-) and NH_(4)^(+) (SNA) directly emitted by the vehicles were very low but increased rapidly in the exhaust *** selective catalytic reduction(SCR) reduced 42.7% TC, 40% NO_(3)^(-) emissions, but increased 104% SO_(4)^(2-) and 36% NH_(4)^(+) emissions, *** summary,the SCR reduced 29% primary PM_(2.5) emissions for the tested diesel *** NH_(4)NO_(3) particle formation maybe more important in the plume, and there maybe other forms of formation of NH_(4)^(+) (***4Cl).The generation of secondary organic carbon(SOC) plays a leading role in the generation of secondary PM_(2.5).The SCR enhanced the formation of SOC and SNA in the plume, but comprehensive analysis shows that the SCR more enhanced the SNA formation in the plume, which is mainly new particles formation *** inconsistency between secondary organic aerosol(SOA) and primary organic aerosol definitions is one of the important reasons for the difference between SOA simulation and observation.

关键词： Variation characteristics Diesel vehicle Emission plume PM2.5 Components

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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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