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Chemical characteristics,oxidative potential,and sources of PM_(2.5)in wintertime in Lahore and Peshawar,Pakistan

Journal of environmental Sciences 2021年第4期33卷 148-158页

作者： Mushtaq Ahmad Qing Yu Jing Chen Siming Cheng Weihua Qin Yuepeng Zhang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China Department of Environmental Sciences University of PeshawarPeshawar 25120Pakistan

The chemical characteristics,oxidative potential,and sources of PM_(2.5)were analyzed at the urban sites of Lahore and Peshawar,Pakistan in February *** species,water soluble ions,and metal elements were measured to investigate the chemical composition and sources of PM_(2.5).The dithiothreitol(DTT)consumption rate was measured to evaluate the oxidative potential of PM_(2.5).Both cities showed a high exposure risk of PM_(2.5)regarding its oxidative potential(DTT v).Carbonaceous and some of the elemental species of PM_(2.5)correlated well with DTT v in both Lahore and ***,the DTT v of PM_(2.5)in Lahore showed significant positive correlation with most of the measured water soluble ions,however,ions were DTT-inactive in *** to the higher proportions of carbonaceous species and metal elements,Peshawar showed higher mass-normalized DTT activity of PM_(2.5)compared to Lahore although the average PM_(2.5)concentration in Peshawar was *** high concentrations of toxic metals also posed serious non-carcinogenic and carcinogenic risks to the residents of both *** component analysis coupled with multiple linear regression was applied to investigate different source contributions to PM_(2.5)and its oxidative *** sources of traffic and road dust resuspension and coal combustion,direct vehicle emission,and biomass burning and formation of secondary aerosol were identified as the major sources of PM_(2.5)in both *** findings of this study provide important data for evaluation of the potential health risks of PM_(2.5)and for formulation of efficient control strategies in major cities of Pakistan.

关键词： Air pollution DTT Health risk Oxidative potential Source apportionment

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Enhanced mid-latitude warming due to poleward shift of sea salt aerosols in a warmer future

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Science Bulletin 2025年

作者： Yang, Yang Yu, Yang Wang, Yujue Wang, Hailong Russell, Lynn M. Wang, Pinya Liao, Hong State Key Laboratory of Climate System Prediction and Risk Management/Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control/Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology/Joint International Research Laboratory of Climate and Environment Change Nanjing University of Information Science and Technology Nanjing210044 China School of Environmental Science and Engineering Nanjing University of Information Science and Technology Nanjing210044 China Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Laboratory of Marine Environment and Ecology Ministry of Education of China Ocean University of China Qingdao266100 China Atmospheric Climate and Earth Sciences Division Pacific Northwest National Laboratory RichlandWA99352 United States Scripps Institution of Oceanography University of California San DiegoCA92093 United States

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Study on the spatiotemporal variability of eco-hydrological characteristics of the rivers in the Longitudinal Range-Gorge Region and their driving forces

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Chinese Science Bulletin 2007年第A02期52卷 122-133页

作者： HU Bo CUI BaoShan WEI GuoLiang ZHAI HongJuan REN HuaLi State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China

Taking two typical rivers in high mountains and steep gorge areas as example,this paper analyzes the spetiotemporal variability of the eco-hydrological characteristics and the driving forces leading to ***,based on the species-environmental data processing,this paper adopts canonical correspondence analysis(CCA)method to identify the environmental factors influencing the distribu- tion of river bank ***,this study uses the ecological diversity Index to represent the spatiotemporel variability of ecological ***,this paper uses the multiple correlation method to analyze the relationship between the hydrological factors and meteorological factors,and to identify the key factors leading to the hydrological regime *** last,based on the analysis of basin water quality data,this paper analyzes the regularity of spatiotemporal variability and its driving *** the systematic analysis on the outcome,we could get that the spatiotemporel distribution of eco-hydrological characteristics shows the regular changes from the upstream to downstream(from the north to the south),and the spatiotemporal variability of eco-hydrological characteristics is typical from the east to the ***,aspect and water distribution are the primary natural driving forces leading to the spatiotemporel variability of eco-hydrological characteristics;and exploitation and op- eration of hydroelectric power station,construction of road on the river bank,and basin land utilization are the main human driving forces.

关键词：空间变化时间变化生态系统纵向岭谷区

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Effects of free ammonia on volatile fatty acid accumulation and process performance in the anaerobic digestion of two typical bio-wastes

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Journal of environmental Sciences 2017年第5期29卷 49-57页

作者： Xuchuan Shi Jia Lin Jiane Zuo Peng Li Xiaoxia Li Xianglin Guo State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC) School of Environment Tsinghua University Beijing 100084 China Beijing Enterprises Water Group Limited Beijing 100124 China

The effect of free ammonia on volatile fatty acid （VFA） accumulation and process instability was studied using a lab-scale anaerobic digester fed by two typical bio-wastes： fruit and vegetable waste （FVW） and food waste （FW） at 35℃ with an organic loading rate （OLR） of 3.0 kg VS/（m3-day）. The inhibitory effects of free ammonia on methanogenesis were observed due to the low C/N ratio of each substrate （15.6 and 17.2, respectively）. A high concentration of free ammonia inhibited methanogenesis resulting in the accumulation of VFAs and a low methane yield. In the inhibited state, acetate accumulated more quickly than propionate and was the main type of accumulated VFA. The co-accumulation of ammonia and VFAs led to an ＂inhibited steady state＂ and the ammonia was the main inhibitory substance that triggered the process perturbation. By statistical significance test and VFA fluctuation ratio analysis, the free ammonia inhibition threshold was identified as 45 mg/L. Moreover, propionate, iso-butyrate and valerate were determined to be the three most sensitive VFA parameters that were subject to ammonia inhibition.

关键词： Ammonia inhibition VFA accumulation Anaerobic digestion Process indicator Bio-wastes

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Effects of highway construction on soil quality in the Longitudinal Range-Gorge Region in Yunnan Province

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Chinese Science Bulletin 2007年第A02期52卷 192-202页

作者： ZHAO ShuQing CUI BaoShan GAO LiNa LIU Jie State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal UniversityBeijing 100875 China

在在西南的中国的纵的范围峡区域包围生态系统之上的高速公路建设的影响基于地调查和试验性的分析被检测。我们在达利上进行了研究(从达利城市到丽江城市)省的道路， Dabao (从达利城市到 Baoshan 城市)高速公路和 Baolong (从 Baoshan... 详细信息

在在西南的中国的纵的范围峡区域包围生态系统之上的高速公路建设的影响基于地调查和试验性的分析被检测。我们在达利上进行了研究(从达利城市到丽江城市)省的道路， Dabao (从达利城市到 Baoshan 城市)高速公路和 Baolong (从 Baoshan 城市到 Longling 县)在纵的范围峡区域的高速公路用包围土壤质量的 space-for-time 替换，和预言的补习的方法玷污质量在包围上检测高速公路建设的效果。结果显示出那：(1 ) 自然、栽培的土壤质量上的高速公路建设的效果是重要的，并且效果比在使用的高速公路的时期在高速公路建设的时期是更重要的。(2 ) 高速公路建设的效果是更明显的在上比 upslope，和效果范围下坡是 200 m 在上下坡，当时 upslope 上的 150 m。(3 ) 土壤补习主要与高速公路建设，高速公路服务时间，植被恢复，土壤有机物和土壤的效果程度有关全部的氮，在哪个之中，高速公路建设是最重要的因素。(4 ) 当植被范围能被恢复到 30% 原来的状况时，土壤质量罐头在 10 年以后被补救到 44% 原来的状况，一旦它被破坏，显示土壤富饶补习是相当困难的。

关键词：纵向岭谷区云南公路土壤

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Effect of salinity on community structure and naphthalene dioxygenase gene diversity of a halophilic bacterial consortium

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Frontiers of environmental Science & Engineering 2016年第6期10卷 41-48页

作者： Tingting Fang Ruisong Pan Jing Jiang Fen He Hui Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China Development and Promotion Center of Environmental Science and Technology Changzhou 213001 China

The aim of this study is to analyze the effect of salinity on polycyclic aromatic hydrocarbons （PAHs） biodegradation, community structure and naphthalene dioxygenase gene （ndo） diversity of a halophilic bacterial consortium with the denaturing gradient gel electrophoresis （DGGE） approach. The consortium was developed from oil-contaminated saline soil after enrichment for six times, using phenanthrene as the substrate. The prominent species in the bacterial consortium at all salinities were identified as halophilic bacteria Halomonas, Alcanivorax, Marinobacter, Idiomarina, Martelella and uncultured bacteria. The predominant microbes gradually changed associating with the saline concentration fluctuations ranging from 0.1% to 25% （w/v）. Two ndo alpha subunits were dominant at salinities ranging, from 0.1% to 20%. while not been clearly detected at 25% salinity. Consistently. the biodegradation occurred at salmltles rangmg from 0.1% to 20%, while no at 25% salinity, suggesting the two ndo genes played an important role in the degradation. The phylogenetic analysis revealed that both of the two ndo alpha subunits were related to the classic nab-like gene from Pseudomonas stutzeri AN10 and Pseudomonas aeruginosa PaK1, while one with identity of about 82% and the other one with identity of 90% at amino acid sequence level. We concluded that salinity greatly affected halophilic bacterial community structure and also the functional genes which were more related to biodegradation.

关键词： Phenanthrene Halophilic bacteria Gene diversity Naphthalene dioxygenase genes

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A systematic review of the inequality of health burdens related to climate change

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Frontiers of environmental Science & Engineering 2024年第5期18卷 137-153页

作者： Xinke Song Shihui Zhang Hai Huang Qun Ding Fang Guo Yaxin Zhang Jin Li Mingyu Li Wenjia Cai Can Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Department of Earth System Science Tsinghua UniversityBeijing100084China

Climate change significantly impacts human health,exacerbating existing health inequalities and creating new *** study addresses the lack of systematic review in this area by analyzing 2440 publications,focusing on four key terms:health,disparities,environmental factors,and climate *** inclusion criteria limited the selection to English-language,peer-reviewed articles related to climate health hazards,ensuring the relevance and rigor of the synthesized *** process synthesized 65 relevant *** investigation revealed that recent research,predominantly from developed countries,has broadened its scope beyond temperature-related impacts to encompass diverse climate hazards,including droughts,extreme weather,floods,mental health issues,and the intersecting effects of Coronavirus Disease *** has highlighted exposure as the most studied element in the causal chain of climate change-related health inequalities,followed by adaptive capability and inherent *** most significant vulnerabilities were observed among populations with low socioeconomic status,ethnic minorities,and *** study further reveals research biases and methodological limitations,such as the paucity of attention to underdeveloped regions,a narrow focus on non-temperature-related hazards,challenges in attributing climate change effects,and a deficit of large-scale empirical *** findings call for more innovative research approaches and a holistic integration of physical,socio-political,and economic dimensions to enrich climate-health discourse and inform equitable policy-making.

关键词： Climate change Health impact Human well-being Inequality Vulnerability

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Diffusion of municipal wastewater treatment technologies in China： a collaboration network perspective

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Frontiers of environmental Science & Engineering 2017年第1期11卷 111-121页

作者： Yang Li Lei Shi Yi Qian Jie Tang State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China Department of Computer Science and Technology Tsinghua University Beijing 100084 China

The diffusion of municipal wastewater treatment technology is vital for urban environment in developing countries. China has built more than 3000 municipal wastewater treatment plants in the past three decades, which is a good chance to understand how technologies diffused in reality. We used a data-driven approach to explore the relationship between the diffusion of wastewater treatment technologies and collaborations between organizations. A database of 3136 municipal wastewater treatment plants and 4634 collaborating organizations was built and transformed into networks for analysis. We have found that： 1）.the diffusion. networks are assortative, arid the .pattems of diffusion vary across technologies; while the collaboration networks are fragmented, and have an assortativity around zero since the 2000s. 2） Important projects in technology diffusion usually involve central organizations in collaboration networks, but organizations become more central in collaboration by doing circumstantial projects in diffusion. 3）The importance of projects in diffusion can be predicted with a Random Forest-model at a good accuracy and precision level. Our findings provide a quantitative understanding of the technology diffusion processes, which could be used for waterrelevant policy-making and business decisions.

关键词： Innovation diffusion Collaboration network Wastewater treatment plant Complex network Data driven

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Mercury flows in large-scale gold production and implications for Hg pollution control

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Journal of environmental Sciences 2018年第6期30卷 91-99页

作者： Qingru Wu Shuxiao Wang Mei Yang Haitao Su Guoliang Li Yi Tang Jiming Hao State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084 China College of Electromechanical Engineering Qingdao University of Science and Technology Qingdao 266061 China

Large-scale gold production（LSGP） is one of the five convention-related atmospheric mercury（Hg） emission sources in the Minamata Convention on Mercury. However, field experiments on Hg flows of the whole process of LSGP are limited. To identify the atmospheric Hg emission points and understand Hg emission characteristics of LSGP, Hg flows in two gold smelters were studied. Overall atmospheric Hg emissions accounted for 10%–17% of total Hg outputs and the Hg emission factors for all processes were 7.6–9.6 kg/ton. There were three dominant atmospheric Hg emission points in the studied gold smelters, including the exhaust gas of the roasting process, exhaust gas from the environmental fog collection stack and exhaust gas from the converter of the refining process. Atmospheric Hg emissions from the roasting process only accounted for 16%–29% of total emissions and the rest were emitted from the refining process. The overall Hg speciation profile（gaseous elemental Hg/gaseous oxidized Hg/particulate-bound Hg） for LSGP was 34.1/57.1/8.8. The dominant Hg output byproducts included waste acid, sulfuric acid and cyanide leaching residue. Total Hg outputs from these three byproducts were 80% in smelter A and 84% in smelter B. Our study indicated that previous atmospheric Hg emissions from large-scale gold production might have been *** emission control in LSGP is not especially urgent in China compared to other significant emission sources（e.g., cement plants）. Instead, LSGP is a potential Hg release source due to the high Hg output proportions to acid and sludge.

关键词： Large-scale gold production Mercury Flow analysis Emission characteristics

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Ammonia removal from low-strength municipal wastewater by powdered resin combined with simultaneous recovery as struvite

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Frontiers of environmental Science & Engineering 2021年第1期15卷 125-134页

作者： Kuo Fang Fei Peng Hui Gong Huanzhen Zhang Kaijun Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China School of Water Resources&Environment China University of GeosciencesBeijing 100083China

Low-strength municipal wastewater is considered to be a recoverable nutrient resource with economic and environmental ***,various technologies for nutrient removal and recovery have been *** this paper,powdered ion exchange resin was employed for ammonia removal and recovery from imitated low-strength municipal *** effects of various working conditions(powdered resin dosage,initial concentration,and pH value)were studied in batch experiments to investigate the feasibility of the approach and to achieve performance *** maximum adsorption capacity determined by the Langmuir model was 44.39 mg/g,which is comparable to traditional ion exchange ***,the effects of co-existing cations(Ca^(2+),Mg^(2+),K^(+))were *** on the above experiments,recovery of ammonia as struvite was successfully achieved by a proposed two-stage crystallization process coupled with a powdered resin ion exchange *** electron microscopy(SEM)and X-ray diffractometry(XRD)results revealed that struvite crystals were successfully gained in alkaline conditions(pH=10).This research demonstrates that a powdered resin and two-stage crystallization process provide an innovative and promising means for highly efficient and easy recovery from low-strength municipal wastewater.

关键词： Ammonia removal and recovery Powdered resin Crystallization process Struvite Co-existing cations

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