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SSRN 2022年

作者： Zheng, Quan Zhang, Yinqiao Zhang, Qianxin Wang, Yujue Yu, Gang School of Environment Beijing Key Laboratory for Emerging Organic Contaminants Control State Key Joint Laboratory of Environmental Simulation and Pollution Control Tsinghua University Beijing100084 China

The electro-peroxone (EP) process is an electricity-based oxidation process that electrochemically produces hydrogen peroxide (H2O2) during ozonation to drive the peroxone (O3/H2O2) process. Prior studies have shown that the EP process can substantially increase ozone-resistant contaminant degradation and reduce bromate generation during water treatment compared with ozonation alone. This study further compared the removal of antibiotic resistant bacteria (ARB) and plasmid-encoded antibiotic resistance genes (ARGs) during groundwater treatment by ozonation alone and the EP process. Owing to the H2O2-promoted ozone (O3) conversion to hydroxyl radicals (•OH), higher •OH exposures, but lower O3 exposures were obtained during the EP process than ozonation alone. This opposite change of O3 and •OH exposures decreases the efficiency of ARB inactivation and ARG degradation moderately during the EP process compared with single ozonation. These results suggest that regarding ARB inactivation and ARG degradation, the reduction of O3 exposures may not be fully counterbalanced by the rise of •OH exposures when changing ozonation to the EP process. However, due to the rise of •OH exposure, plasmid DNA was more thoroughly cleaved to shorter fragments during the EP process than single ozonation, which may decrease the risks of natural transformation of ARGs. These findings highlight that the influence of the EP process on ARB and ARG inactivation needs to be considered when implementing this process to enhance contaminant degradation in water treatment. © 2022, The Authors. All rights reserved.

关键词： Antibiotics

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非农业源排放增强大气二甲胺浓度并调节城市颗粒物成核

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Science Bulletin 2023年第13期68卷 1447-1455,M0004页

作者：常运华凌清扬盖鑫磊袁相洋周升钱程凯毛鉴炯黄丹丹胡磬遥鲁君崔世杰高雅琴陆轶群朱亮谭稳郭松胡敏王红丽黄成黄汝锦张远航胡建林 Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters NUIST Center on Atmospheric EnvironmentNanjing University of Information Science&Technology(NUIST)Nanjing 210044China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologyNanjing University of Information Science&TechnologyNanjing 210044China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Department of Environmental Science and EngineeringFudan UniversityShanghai 200433China State Environmental Protection Key Laboratory of Formation and Prevention of Urban Air Pollution Complex Shanghai Academy of Environmental SciencesShanghai 200233China TOFWERK China Nanjing 211800China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Loess and Quaternary Geology Center for Excellence in Quaternary Science and Global ChangeKey Laboratory of Aerosol Chemistry&PhysicsInstitute of Earth and EnvironmentChinese Academy of SciencesXi’an 710061China

气态二甲胺(DMA)是大气新粒子生成的关键前体物,然而对其来源与空气和气候效应仍存在巨大争议.本研究率先对中国大气DMA浓度开展了南北跨区域与城市内部的走航观测.发现亚热带森林植物的DMA排放浓度可能南方远高于北方,同时记录到由工... 详细信息

气态二甲胺(DMA)是大气新粒子生成的关键前体物,然而对其来源与空气和气候效应仍存在巨大争议.本研究率先对中国大气DMA浓度开展了南北跨区域与城市内部的走航观测.发现亚热带森林植物的DMA排放浓度可能南方远高于北方,同时记录到由工业脉冲排放所导致的全球最高大气DMA浓度.在高度城市化的上海地区,DMA浓度自市中心向外围逐渐降低且与人口密度关联.源排放的直接测试进一步表明中国区域和城市内部的大气二甲胺都深受非农业源排放的影响.大气化学传输模式也证实,居民DMA排放主导了上海城市大气颗粒物数浓度的贡献.该研究将外场观测、源排放测试与模型模拟相结合,呈现了中国大气二甲胺的全生命周期,为颗粒物污染防治和气候变化评估提供了有用参考.

关键词： Newparticleformation Amines Volatile organic compounds Urbanatmosphere Non-agricultural sources

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Characteristics of runoff and sediment yield for two typical erodible soils in southern China

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International Journal of Sediment Research 2022年第5期37卷 653-661页

作者： Xuchao Zhu Yin Liang Lili Qu Longxi Cao Zhiyuan Tian Tong Liu Meng Li State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences College of Advanced Agricultural Sciences University of Chinese Academy of Sciences College of Ecology and Environment Chengdu University of Technology National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China Guangdong Key Laboratory of IntegratedAgro-environmental Pollution Control and Management Institute of Eco-environmental and Soil Sciences Guangdong Academy of Sciences Hydrology and Water Resources Investigation Bureau of Jiangsu Province

Granite red soil(GRS) and Quaternary red clay(QRC) are two typical erodible soils in the red-soil region of southern China. Analytical and comparative studies of the characteristics of runoff and sediment yield for the two soils at various slopes are currently needed. The purpose of the current study was to clarify the characteristics of runoff and sediment yield for GRS and QRC at different slopes and to establish models for estimating sediment yield for the two soils. Forty-eight runoff microplots with four slopes(5°, 15°, 25°, and 35°) and two soils(GRS and QRC) were established and exposed to natural rainfall. Runoff and sediment yield were measured 10 times during the study period. Runoff and sediment yield for the two soils under the various slopes had similar temporal variations, and both increased with prior cumulative erosive rainfall. Runoff for GRS and QRC was moderately temporally variable, with coefficients of variation(CVs) from 46.2% to 60.6%, and sediment yield for QRC was strongly temporally variable, with CVs from 114.8% to 145.8%. Sediment yield for GRS increased with slope, but sediment yield for QRC first increased and then decreased, with a calculated inflection point of 18°, but runoff for both soils decreased with slope. The CVs of both runoff and sediment yield with slope for the two soils ranged from 3.6% to 88.0%, lower than the temporal variabilities, indicating that rainfall may have a larger impact than slope on runoff and sediment yield for QRC and GRS. Under the various slopes, runoff and sediment yield for both soils increased with rainfall and sediment yield increased with runoff, but the proportions of effective rainfall and runoff differed. Pedotransfer-function models based on rainfall, runoff, and slope accurately estimated sediment yield for the two soils, with the model fit coefficient of determination(R2) > 0.81 and the R2for verification >0.79. These results improve the understanding of the laws governing erosion for differe

关键词： Runoff and sediment characteristics Sediment-yield simulation Granite red soil Quaternary red clay Pedotransfer function Red-soil region

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Determination of 27 pharmaceuticals and personal care products(PPCPs)in water:The benefit of isotope dilution

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Frontiers of environmental Science & Engineering 2020年第1期14卷 127-136页

作者： Xueqi Fan Jie Gao Wenchao Li Jun Huang Gang Yu State Key Joint Laboratory of Environment Simulation and Pollution Control(SKJLESPC) Beijing Key Laboratory for Emerging Organic Contaminants Control(BKLEOC)School of EnvironmentTsinghua UniversityBeijing 100084China CSD IDEA(Beijing)Environment Test&Analysis Co. Ltd.Beijing 100192China

Pharmaceuticals and personal care products(PPCPs)are a unique group of emerging and nonpersistent *** this study,27 PPCPs in various water samples were extracted by solid phase extraction(SPE),and determined by isotope dilution method using liquid chromatography coupled to tandem triple quadruple mass spectrometer(LC-MS/MS).A total of 27 isotopically labeled standards(ILSs)were applied to correct the concentration of PPCPs in spiked ultrapure water,drinking water,river,effluent and influent *** corrected recoveries were 73%-122%with the relative standard deviation(RSD)<16%,except for *** matrix effect for all kinds of water samples was<22%and the method quantitation limits(MQLs)were 0.45-8.6 ng/*** developed method was successfully applied on environmental water *** SPE extracts of spiked ultrapure water,drinking water,river and wastewater effluent were stored for 70 days,and the ILSscorrected recoveries of 27 PPCPs were obtained to evaluate the correction ability of ILSs in the presence of variety *** recoveries of 27 PPCPs over 70 days were within the scope of 72%-140%with the recovery variation<37%in all *** isotope dilution method seems to be of benefit when the extract has to be stored for long time before the instrument analysis.

关键词： Pharmaceuticals and personal care products(PPCPs) Isotopically labeled standard(ILSs) Water Solid-phase extraction(SPE) LC-MS/MS

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Phthalate levels in Chinese residences:Seasonal and regional variations and the implication on human exposure

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National Science Open 2023年第6期2卷 65-79页

作者： Yatai Li Jing Hou Zukun Wang Xilei Dai Yuexia Sun Junjie Liu Yingjun Liu Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China College of Public Health Zhengzhou UniversityZhengzhou 450001China Tianjin Key Lab of Indoor Air Environmental Quality Control School of Environmental Science and EngineeringTianjin UniversityTianjin 300072China College of Design and Engineering National University of SingaporeSingapore 117566Singapore Center for Environment and Health Peking UniversityBeijing 100871China

Indoor pollution of manmade semivolatile organic compounds(SVOCs)such as phthalates are a growing threat to human *** we summarize the dust-phase phthalate concentrations in Chinese residences reported from 2011 to 2021and simulate corresponding airborne concentrations based on equilibrium *** simulation considers seasonal and regional variations in indoor temperature and PM_(2.5)concentration,in contrast to the common practice of using constant *** show that variations in these two environmental factors lead to up to ten-and six-fold variations in the monthly median gas-and particle-phase concentrations of phthalates,respectively,in residences in individual climate *** higher-vaporpressure species di-n-butyl phthalate and di-isobutyl phthalate,the resultant seasonal and regional variations in aggregate nondiet intake can reach six-and three-fold,*** results have important implications on exposure assessment of SVOCs and epidemiological evaluation of their health effects.

关键词： SVOCs indoor air temperature dust

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Towards rational design of Cu-SSZ-13 catalysts with less N2O formation in NH3-SCR reaction: The effect of Brønsted acid sites

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Journal of environmental Sciences (China) 2025年 157卷 546-557页

作者： Liu, Jianqi Du, Jinpeng Wang, Jingyi Han, Shichao Shan, Yulong Zhang, Yan Wu, Xuanhao Gao, Shan Yu, Yunbo Wu, Zhongbiao Shan, Wenpo He, Hong Fujian Key Laboratory of Atmospheric Ozone Pollution Prevention Institute of Urban Environment Chinese Academy of Sciences Xiamen361021 China University of Chinese Academy of Sciences Beijing100049 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control Ningbo Urban Environment Observation and Research Station Institute of Urban Environment Chinese Academy of Sciences Ningbo315800 China Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai201210 China Department of Environmental Engineering Zhejiang University Hangzhou310058 China Zhejiang Tianlan Environmental Protection Technology Co. Ltd. Hangzhou311202 China

Ammonia Selective Catalytic Reduction (NHs-SCR) technology has been employed to eliminate NOx from diesel engine exhaust, with Cu-SSZ-13 serving as the commercial catalyst. The greenhouse gas N2O is produced as a byproduct when using Cu-SSZ-13 as the NH3-SCR catalyst. To achieve synergistic control of pollutants and greenhouse gases in diesel engine exhaust, rational design of Cu-SSZ-13 catalysts is required. In this study, the effect of Brønsted acid sites in Cu-SSZ-13 catalysts on the formation of N2O was investigated. Mild thermal treatment was innovatively employed to prepare Cu-SSZ-13 catalysts with different amounts of Brønsted acid sites. EPR, H2-TPR, NH3-TPD, NMR were utilized to determine that the Brønsted acid sites were modified while the Cu species remained unchanged. Thereby an accurate assessment of the influence of Brønsted acid sites on N2O formation could be achieved. Our results showed that Cu-SSZ-13 with more Brønsted acid sites produced less N2O during the NH3-SCR reaction. In the low-temperature region, the presence of framework acid sites facilitates the decomposition of the NH4NO3 assisted by NO to form N2 and H2O, reducing the formation of N2O. In the high-temperature region, the Brønsted acid sites promote the decomposition of NH2NO into N2 and H2O. Meanwhile, the N2O-SCR reaction can also be promoted by Brønsted acid sites, thereby decreasing N2O emissions. This study suggests that in the future design and synthesis of Cu-SSZ-13 zeolites, attention should be paid to creating more Brønsted acid sites in Cu-SSZ-13 to reduce N2O emissions. © 2024

关键词： Emission control

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Unneglectable Terrestrial Export of Dissolved Organic Carbon in China

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SSRN 2024年

作者： Yu, Qian Li, Han Ge, Xiaodong Ma, Mingrui Zhao, Wenxin Yang, Jinya Mulder, Jan Zhang, Lei Zhao, Yu Duan, Lei State Key Laboratory of Pollution Control & Resource Reuse School of Environment Nanjing University Jiangsu Nanjing210023 China State Key Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Faculty of Environmental Sciences and Natural Resource Management Norwegian University of Life Sciences Box 5003 Ås1432 Norway State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Tsinghua University Beijing100084 China China

Transport of dissolved organic carbon (DOC) from land to inland waters is a crucial yet usually overlooked component of carbon budget. Its magnitude and response to global change are poorly quantified due to limited direct observation, especially in China. Here we compiled a database from 462 headwaters across China, primary based on our own observation, and applied a generalized additive model (GAM) to quantify terrestrial DOC export from 2000 to 2020. Our results reveal substantial underestimations in current assessments relying on riverine data. Over this period, terrestrial DOC export averaged 13.4 ± 1.5 Tg C yr−1, accounting for approximately 10% of national net biome productivity (NBP). Projections under SSP2-4.5 and carbon-neutral scenarios suggest an increase to 17.1 Tg C yr−1 in 2060, driven by decreasing atmospheric deposition and rising temperatures. This highlights the importance of considering DOC export in terrestrial carbon sink assessments, particularly as global change continues to evolve. © 2024, The Authors. All rights reserved.

关键词： Carbon sequestration

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Flame-Made High-Capacity and High Efficient Nanomaterial Wo3-Ceox-Cuo/Tio2 for Mercury Adsorption

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SSRN 2023年

作者： Sen, Shao Li, Guoliang You, Xiaoqing Wang, Shuxiao Key Laboratory for Thermal Science and Power Engineering Ministry of Education Tsinghua University Beijing100084 China Center for Combustion Energy Tsinghua University Beijing100084 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084 China

High-concentration mercury capture at high temperatures is a big challenge for cement clinker production during the periodical shutdown period of raw meal mill. This study synthesized nanomaterials WO3-CeOx-CuO/TiO2 for mercury removal by both wet impregnation and flame synthesis. The performance of the synthesized sorbents is evaluated for mercury removal at 450 °C, which is above the typical temperature at raw meal shutdown conditions. It is found that the adsorption efficiency of the flame-synthesized sorbent remains above 95% after 30 days of absorption, while the sorbent synthesized by wet impregnation gets saturated after 50 hours. To understand the adsorption mechanism, the physicochemical properties of the sorbents including surface area, pore volume and average pore diameter, phase composition, morphology, valence states of surface elements are characterized by N2 adsorption isotherm, transmission electron microscope, X-ray diffraction, X-ray photoelectron spectroscopy (XPS) separately. The results show that the flame-synthesized sorbent has a larger specific surface area and smaller primary particle sizes than the sorbent by wet impregnation. In addition, Cu atoms are dispersed in the flame-synthesized sorbent while CuO clusters are supported on CeO2 in the sorbent by wet impregnation. Based on the XPS results, it can be found that the oxidizing species is the adsorbed molecular oxygen from environment for flame-synthesized sorbent but surface active oxygen (Oβ) is consumed for the sorbent synthesized by the impregnation method. © 2023, The Authors. All rights reserved.

关键词： Adsorption

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Enhanced secondary pollution offset reduction of primary emissions during COVID-19 lockdown in China

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National Science Review 2021年第2期8卷 51-59页

作者： Xin Huang Aijun Ding Jian Gao Bo Zheng Derong Zhou Ximeng Qi Rong Tang Jiaping Wang Chuanhua Ren Wei Nie Xuguang Chi Zheng Xu Liangduo Chen Yuanyuan Li Fei Che Nini Pang Haikun Wang Dan Tong Wei Qin Wei Cheng Weijing Liu Qingyan Fu Baoxian Liu Fahe Chai Steven J.Davis Qiang Zhang Kebin He School of Atmospheric Sciences Nanjing University Chinese Research Academy of Environmental Sciences Department of Earth System Science Tsinghua University State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua University Department of Earth System Science University of California Jiangsu Environmental Monitoring Center Jiangsu Provincial Academy of Environment Science Shanghai Environmental Monitoring Center Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology Beijing Municipal Environmental Monitoring Center

To control the spread of the 2019 novel coronavirus(COVID-19), China imposed nationwide restrictions on the movement of its population(lockdown) after the Chinese New Year of 2020, leading to large reductions in economic activities and associated emissions. Despite such large decreases in primary pollution, there were nonetheless several periods of heavy haze pollution in eastern China, raising questions about the well-established relationship between human activities and air quality. Here, using comprehensive measurements and modeling, we show that the haze during the COVID lockdown was driven by enhancements of secondary pollution. In particular, large decreases in NOx emissions from transportation increased ozone and nighttime NO3radical formation, and these increases in atmospheric oxidizing capacity in turn facilitated the formation of secondary particulate matter. Our results, afforded by the tragic natural experiment of the COVID-19 pandemic, indicate that haze mitigation depends upon a coordinated and balanced strategy for controlling multiple pollutants.

关键词： COVID-19 haze pollution ozone emission reduction secondary pollution

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Tailpipe emissions and fuel consumption of a heavy-duty diesel vehicle using palm oil biodiesel blended fuels

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Science of the Total environment 2024年 955卷 177048页

作者： He, Liqiang Li, Yang Min, Yihang Yoong, Junhao Chen, Shiqing Jiao, Jiwen Li, Zhenhua Zhu, Luole Zhang, Shaojun Wu, Ye State Environmental Protection Key Laboratory of Vehicle Emission Control and Simulation Chinese Research Academy of Environmental Sciences Beijing100012 China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University Beijing100084 China Institute of Environment and Ecology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen518055 China Malaysian Palm Oil Board Kajang43000 Malaysia Palm Oil Research and Technical Service Institute of Malaysian Palm Oil Board Shanghai201108 China Beijing Tus Deqing Bioenergy Co. Ltd Beijing100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084 China

Biodiesel application, such as using waste cooking oil biodiesel in Shanghai, China, is a sustainable solution that addresses the challenges posed by escalating air pollution, energy security, and climate change. Future efforts may involve blending biodiesel from alternative sources like crude palm oil with diesel in China. This study tested a China V heavy-duty diesel vehicle equipped with a selective catalytic reduction (SCR) system using various palm oil biodiesel blended fuels (i.e., B0, B5, B10, and B20). The findings indicated that using biodiesel blends led to reductions in carbon monoxide (CO), hydrocarbon (HC), and particle number (PN) emissions compared to B0, while nitrogen oxide (NOX) emissions remained similar. Higher biodiesel content significantly reduced petroleum diesel consumption, but no statistically significant differences were found in total carbon dioxide (CO2) emissions and fuel consumption. Various factors such as vehicle speed, payload, and cold starts influence tailpipe emissions and fuel consumption. Specifically, high-speed phases notably reduced CO, HC, and PN emissions with the use of biodiesel blends. Lower payloads were linked to decreased CO2 emissions and fuel consumption but increased NOX emissions. Cold starts increased HC and NOX emissions, especially with higher biodiesel blending ratios. These results can provide valuable empirical insights into palm oil biodiesel emissions. © 2024 Elsevier B.V.

关键词： Low emission

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