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Chemical characterization and source apportionment of atmospheric submicron particles on the western coast of Taiwan Strait, China

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Journal of Environmental Sciences 2017年第2期29卷 293-304页

作者： Liming Cao Qiao Zhu Xiaofeng Huang Junjun Deng Jinsheng Chen youwei hong Lingling Xu Lingyan He Key Laboratory for Urban Habitat Environmental Science and Technology School of Environment and Energy Peking University Shenzhen Graduate School Center for Excellence in Urban Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences

Taiwan Strait is a special channel for subtropical East Asian Monsoon and its western coast is an important economic zone in China. In this study, a suburban site in the city of Xiamen on the western coast of Taiwan Strait was selected for fine aerosol study to improve the understanding of air pollution sources in this region. An Aerodyne high-resolution time-of-flight aerosol mass spectrometer（HR-To F-AMS） and an Aethalometer were deployed to measure fine aerosol composition with a time resolution of 5 min from May 1to 18, 2015. The average mass concentration of PM1 was 46.2 ± 26.3 μg/m^3 for the entire campaign. Organics（28.3%）, sulfate（24.9%）, and nitrate（20.6%） were the major components in the fine particles, followed by ammonium, black carbon（BC）, and chloride. Evolution of nitrate concentration and size distribution indicated that local NOx emissions played a key role in high fine particle pollution in Xiamen. In addition, organic nitrate was found to account for 9.0%–13.8% of the total measured nitrate. Positive Matrix Factorization（PMF）conducted with high-resolution organic mass spectra dataset differentiated the organic aerosol into three components, including a hydrocarbon-like organic aerosol（HOA） and two oxygenated organic aerosols（SV-OOA and LV-OOA）, which on average accounted for 27.6%,28.8%, and 43.6% of the total organic mass, respectively. The relationship between the mass concentration of submicron particle species and wind further confirmed that all major fine particle species were influenced by both strong local emissions in the southeastern area of Xiamen and regional transport through the Taiwan Strait.

关键词： Submicron particle Chemical characterization Organic aerosol Source apportionment

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Aerosol light absorption in a coastal city in Southeast China:Temporal variations and implications for brown carbon

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Journal of Environmental Sciences 2019年第6期31卷 257-266页

作者： Yuqing Qiu Xin Wu Yanru Zhang Lingling Xu youwei hong Jinsheng Chen Xiaoqiu Chen Junjun Deng Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Key Laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences University of Chinese Academy of Sciences Fujian Environmental Monitoring Station Institute of Surface-Earth System Science Tianjin University

Light-absorbing carbonaceous aerosols including black carbon(BC) and brown carbon(BrC)play significant roles in atmospheric radiative properties. One-year measurements of aerosol light absorption at multi-wavelength were continuously conducted in Xiamen,southeast of China in 2014 to determine the light absorption properties including absorption coefficients(σabs) and absorption ?ngstr?m exponent(AAE) in the coastal *** absorptions of BC and BrC with their contributions to total light absorption were further quantified. Mean σabsat 370 nm and 880 nm were 56.6 ± 34.3 and 16.5 ± 11.2 Mm-1,respectively. σabspresented a double-peaks diurnal pattern with the maximum in the morning and the minimum in the afternoon. σabswas low in warm seasons and high in cold seasons. AAE ranged from 0.26 to 2.58 with the annual mean of 1.46, implying that both fossil fuel combustion and biomass burning influenced aerosol optical properties. σabsof BrC at 370 nm was 24.0 ± 5.7 Mm-1, contributing 42% to the total absorption. The highest AAE(1.52 ± 0.02) and largest BrC contributions(47% ± 4%) in winter suggested the significant influence of biomass burning on aerosol light absorption. Long-distance air masses passing through North China Plain and the Yangtze River Delta led to high AAE and BrC contributions. High AAE value of 1.46 in July indicated that long-range transport of the air pollutants from intense biomass burning in Southeast Asia would affect aerosol light absorption in Southeast China. The study will improve the understanding of light absorption properties of aerosols and the optical impacts of BrC in China.

关键词： Light absorption Brown carbon Black carbon Absorption Angstrom exponent Biomass burning Western Taiwan Strait

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Pharmaceutical compounds in aquatic environment in China： locally screening and environmental risk assessment

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Frontiers of Environmental Science & Engineering 2015年第3期9卷 394-401页

作者： Yongshan CHEN Xiuping XI Gang YU Qiming CAO Bin WANG Franfois VINCE youwei hong Key Laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China School of Environment THU-VEOLIA Joint Research Center for Advanced Environmental Technology Tsinghua University Beijing 100084 China

An environmental risk assessment was performed for pharmaceutical compounds present in the aquatic environment of China. Predicted environmental concentration （PEC） of the compounds were calculated according to European Medicines Evaluation Agency （EMEA） guidelines. Available ecotoxicological data compromised by applying a very conservative assessment factor （AF） were employed to calculate the predicted noeffect concentration （PNEC）. The screening principle and the risk assessment were based on risk quotient （RQ）, which derived from the PEC and related PNEC values. PEC results indicated that all the compounds except sulfadimethoxine and levocamitine, should carry out phase II risk assessment in EMEA guideline. RQ values suggested that more than 36 pharmaceuticals may be imposed health threats to the aquatic environment; especially the antibiotic therapeutic class including amoxicillin, sulfasalazine, trimethoprim, oxytetracycline and erythromycin showed high RQ values. These substances with high RQ value （RQ≥ 1） were regarded as top- priority pharmaceuticals for control in the aquatic environment of China. However, the antibiotic substances which had low risk quotient （RQ 〈 1）, should be reassessed by its potentially induced resistance under low concentration in future.

关键词： pharmaceuticals aquatic environment risk assessment aquatic toxicity risk quotient

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Sources appointment and health risks of PM_(2.5)-bound trace elements in a coastal city of southeastern China

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Journal of Environmental Sciences 2024年第4期138卷 561-571页

作者： Ziyi Lin Xiaolong Fan Gaojie Chen youwei hong Mengren Li Lingling Xu Baoye Hu Chen Yang Yanting Chen Zhiqian Shao Jinsheng Chen Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy ofSciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Minnan Normal University Zhangzhou 363000China

To gain a comprehensive understanding of sources and health risks of trace elements in an area of China with high population densities and low PM_(2.5)concentrations,15 trace elements(Al,K,Ca,Ti,V,Cr,Mn,Fe,Ni,Cu,Zn,As,Sn,Ba,Pb)in PM_(2.5)were monitored from December 2020 to November 2021 in a representative city,*** concentrations of trace elements in Xiamen displayed an obvious seasonal variation and were dominated by K,Fe,Al,Ca and *** on Positive Matrix Factorization analysis,source appointment revealed that the major sources of trace elements in Xiamen were traffic,dust,biomass and firework combustion,industrial manufacture and shipping *** to health risk assessment combined with the source appointment results,it indicated that the average noncarcinogenic risk was below the threshold and cancer risk of four hazardous metals(Cr,Ni,As,Pb)exceeded the threshold(10^(-6)).Traffic-related source had almost half amount of contribution to the health risk induced by PM_(2.5)-bound trace *** the dust transport period or Spring Festival period,the health risks exceeded an acceptable threshold even an order of magnitude higher,suggesting that the serious health risks still existed in low PM_(2.5)environment at certain *** risk assessment reminded that the health risk reduction in PM_(2.5)at southeastern China should prioritize traffic-related hazardous trace elements and highlighted the importance of controlling vehicles emissions in the future.

关键词： PM_(2.5)-bound trace elements Seasonal variations Source appointment Health risks Traffic-related source

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Atmospheric oxidation capacity and O_(3) formation in a coastal city of southeast China:Results from simulation based on four-season observation

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Journal of Environmental Sciences 2024年第2期136卷 68-80页

作者： Gaojie Chen Taotao Liu Jinsheng Chen Lingling Xu Baoye Hu Chen Yang Xiaolong Fan Mengren Li youwei hong Xiaoting Ji Jinfang Chen Fuwang Zhang Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Minnan Normal University Zhangzhou 363000China College of Harbour and Coastal Engineering Jimei UniversityXiamen 361021China Environmental Monitoring Center of Fujian Fuzhou 350013China

The pollution of atmospheric ozone in China shows an obvious upward trend in the past ***,the studies on the atmospheric oxidation capacity and O_(3)formation in four seasons in the southeastern coastal region of China with the rapid urbanization remain ***,a four-season field observation was carried out in a coastal city of southeast China,using an observation-based model combining with the Master Chemical Mechanism,to explore the atmospheric oxidation capacity(AOC),radical chemistry,O_(3)formation pathways and *** results showed that the average net O_(3)production rate(14.55 ppbv/hr)in summer was the strongest,but the average O_(3)concentrations in autumn was *** AOC and ROx levels presented an obvious seasonal pattern with the maximum value in summer,while the OH reactivity in winter was the highest with an average value of 22.75 sec^(-1).The OH reactivity was dominated by oxygenated VOCs(OVOCs)(30.6%-42.8%),CO(23.2%-26.8%),NO_(2)(13.6%-22.0%),and alkenes(8.4%-12.5%)in different *** photolysis dominated OH primary source on daytime in winter,while in other seasons,HONO photolysis in the morning and ozone photolysis in the afternoon contributed *** analysis indicated that O_(3)production was controlled by VOCs in spring,autumn and winter,but a VOC-limited and NOx-limited regime in summer,and alkene and aromatic species were the major controlling factors to O_(3)***,the study characterized the atmospheric oxidation capacity and elucidated the controlling factors for O_(3)production in the coastal area with the rapid urbanization in China.

关键词： Atmospheric oxidation capacity Radical chemistry Ozone production Sensitivity analysis

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Accumulation of polycyclic aromatic hydrocarbons from contaminated soil by Kandelia candel

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Acta Oceanologica Sinica 2009年第6期28卷 24-29页

作者： hong youwei YUAN Dongxing LIAO Dan LIU Baomin State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China College of Environment and Plant Protection Hainan University Danzhou 71737 China

The purpose of this study was to investigate the accumulation behavior of two typical PAHs, phenanthrene （PHE） and fluoranthene （FLA）, uptaken by the mangrove Kandelia candel in various treated sandy soils. The experiment lasted for three months. Soil and plant samples were collected after 3, 6, 9 and 13 weeks of the incubation and the levels of PAHs were analyzed using a GC/MS （HP6890-5975B）. The results showed that the root accumulations of PHE and FLA were elevated with the increase of the PAH concentrations in the soil. With prolonged exposure time, PHE and FLA concentrations of the roots increased significantly in comparison with the control. PHE and FLA concentrations of root after 13 weeks of treatment ranged from 0.28 to 4.36 #g.g-1 and 0.79 to 35.76 pg.g 1 respectively. The calculated mean values of the root concentration factors were 0.58 for PHE and 0.71 for FLA. This indicated that root accumulation of FLA was greater than PHE, which would result from the higher octanol-water partition coefficient （Kow） of FLA. These results underline the ability of mangroves to remove PAHs from contaminated marine substrates and hence their potential use in bioremediation and the removal of PAHs from the marine food chain.

关键词： accumulation uptake phenanthrene fluoranthene mangrove ecosystem Kandelia candel

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多环芳烃(PAHs)污染对滨海湿地入侵植物互花米草的影响

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应用与环境生物学报 2018年第4期24卷 894-900页

作者：廖丹黄华斌庄峙厦洪有为厦门华厦学院检验科学与技术系厦门361024 中国科学院城市环境研究所城市环境与健康重点实验室厦门361021

滨海湿地生态系统正遭受着人为活动或自然因素的威胁,为探究多环芳烃（PAHs）污染对滨海湿地入侵植物互花米草根际、根内微生物的影响及植物-微生物联合修复PAHs的潜力,设置含有不同浓度菲和芘的沉积物处理,通过盆栽实验对互花米草幼苗... 详细信息

滨海湿地生态系统正遭受着人为活动或自然因素的威胁,为探究多环芳烃（PAHs）污染对滨海湿地入侵植物互花米草根际、根内微生物的影响及植物-微生物联合修复PAHs的潜力,设置含有不同浓度菲和芘的沉积物处理,通过盆栽实验对互花米草幼苗进行暴露.结果显示,培养70 d后,菲和芘的去除率分别为13%-36%和11%-30%;菲处理的互花米草根际沉积物中脱氢酶活性显著高于对照（P〈0.05）,非根际沉积物多酚氧化酶活性则降低10%.磷脂脂肪酸（PLFA）分析显示,菲处理显著降低了根际沉积物微生物量（P〈0.05）,尤其是革兰氏阴性菌下降了24%;而芘处理对脱氢酶、多酚氧化酶以及总微生物量的影响相对较小.100 mg/kg菲处理使得根际与根内革兰氏阴性菌PAHs-环羟基双加氧酶基因（PAH-RHDα-GN）丰度比对照组分别增加了100倍和3倍;而100 mg/kg芘处理使得根际与非根际沉积物中PAH-RHDα-GP丰度显著升高（P〈0.05）.上述结果表明,入侵植物互花米草对PAHs污染存在明显的响应,其根内细菌在植物-微生物联合修复PAHs污染具有重要的作用.

关键词：多环芳烃互花米草根内细菌 PAHs-环羟基双加氧酶荧光定量PCR

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互花米草入侵对红树秋茄根际与根内细菌群落结构与多样性的影响

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应用与环境生物学报 2018年第2期24卷 269-275页

作者：廖丹黄华斌庄峙厦洪有为厦门华厦学院检验科学与技术系厦门361024 中国科学院城市环境研究所城市环境与健康重点实验室厦门361021

根际/根内微生物在湿地生态系统碳、氮、硫循环中发挥着重要作用，也是外来植物入侵机制研究的重要组成部分. 选取福建九龙江口南岸互花米草纯林、秋茄纯林及互花米草和秋茄混交林等生境，采用Illumina高通量测序技术分析植物根内、根... 详细信息

根际/根内微生物在湿地生态系统碳、氮、硫循环中发挥着重要作用，也是外来植物入侵机制研究的重要组成部分. 选取福建九龙江口南岸互花米草纯林、秋茄纯林及互花米草和秋茄混交林等生境，采用Illumina高通量测序技术分析植物根内、根表及根际沉积物中细菌群落组成. 结果显示：互花米草纯林根际细菌的多样性指数明显高于混交林和秋茄纯林；UniFrac主成分分析（PCA）结果表明不同生境各细菌群落组成存在显著性差异；两类植物根表细菌以变形菌门（Proteobacteria）、拟杆菌门（Bacteroidetes）、绿弯菌门（Chloroflexi）和厚壁菌门（Firmicutes）为主，其中互花米草纯林中各类细菌占比分别为78.0%、5.6%、3.3%和1.6%；根内以蓝细菌（Cyanobacteria）和变形菌门等为主. 线性判别分析（LDA）结果表明植物根内和根表存在大量与碳、氮、硫循环相关的功能微生物，如假交替单胞菌科（Pseudoalteromonadaceae）、弧菌科（Vibrionaceae）、嗜甲基菌科（Methylophilaceae）和脱硫弧菌属（Desulfovibrio）等. 本研究表明与根际微生物相比，根内细菌群落对植物入侵造成的环境变化更加敏感，结果可为深入研究互花米草入侵机制提供重要科学依据. （图5 表2 参36）

关键词：入侵机制内生细菌根际细菌群落结构互花米草红树植物 Illumina测序

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大气中新粒子生成机制的研究进展

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环境科学与技术 2022年第4期45卷 87-99页

作者：汪晶李梦仁洪有为陈进生福建农林大学资源与环境学院福建福州350002 中国科学院城市环境研究所中国科学院区域大气环境研究卓越创新中心福建厦门361021 中国科学院城市环境研究所城市环境与健康重点实验室福建厦门361021 中国科学院大学资源与环境学院北京100086

新粒子生成是大气气溶胶粒子的重要来源之一,对全球空气质量、气候效应和人体健康都有着重要的影响。该文综述了实际环境大气观测新粒子成核过程中使用仪器的发展变化进程和大气中新粒子成核机制以及随后增长过程的重要研究成果。目前... 详细信息

新粒子生成是大气气溶胶粒子的重要来源之一,对全球空气质量、气候效应和人体健康都有着重要的影响。该文综述了实际环境大气观测新粒子成核过程中使用仪器的发展变化进程和大气中新粒子成核机制以及随后增长过程的重要研究成果。目前在全球很多不同的大气环境下都观测到了新粒子生成事件发生,并通过实验室研究和模型模拟发现了一些成核和增长机制,然而尚未有统一的机制能够全面系统地解释不同环境下新粒子是如何生成和增长的。特别是中国大气复合污染条件下粒子成核和增长的机制尚不明确。开发和应用先进的监测技术,结合外场观测、实验室研究和模型模拟等研究方法,在不同环境下进行长期的全面综合观测研究,进一步探究新粒子生成和增长背后的化学机制以及新粒子对区域空气质量和全球气候变化产生的影响,是大气新粒子生成研究亟待开展的工作。

关键词：新粒子生成成核监测技术前体物成核机制增长机制

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外来种互花米草根内细菌多样性及功能

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应用与环境生物学报 2014年第5期20卷 856-862页

作者：李虎廖丹苏建强黄福义洪有为中国科学院城市环境研究所城市环境与健康重点实验室厦门361021 中国科学院大学北京100049 厦门华厦职业学院厦门361024

外来种互花米草(Spartina alterniflora)是滨海湿地生态系统的重要组成部分.通过构建16S rRNA基因文库,研究福建省九龙江红树林自然保护区中互花米草根内细菌组成和多样性.研究发现:互花米草根内细菌主要分为4个门,其中变形菌门(Proteob... 详细信息

外来种互花米草(Spartina alterniflora)是滨海湿地生态系统的重要组成部分.通过构建16S rRNA基因文库,研究福建省九龙江红树林自然保护区中互花米草根内细菌组成和多样性.研究发现:互花米草根内细菌主要分为4个门,其中变形菌门(Proteobacteria)占57.69%,其次是拟杆菌门(Bacteroidetes)和梭菌(Clostridia);可分为9个纲,其中γ变形菌纲(γ-Proteobacteria)类群在文库中所占比例最大,为25.96%;其次是δ变形菌纲(δ-Proteobacteria)、拟杆菌纲(Bacteroidetes)和梭菌纲(Clostridia).同时,克隆文库中包含与降解多环芳烃(PAHs)、脱硫、甲烷氧化、碳循环及固氮相关的菌属,且存在大量与数据库同源性比对低于95%的序列.该结果可为互花米草入侵机制探讨和相关功能微生物的分离和研究提供参考依据.

关键词：内生细菌多样性互花米草根

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