globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosenv.2017.08.056
Scopus记录号: 2-s2.0-85028471072
论文题名:
Atmospheric occurrence, transport and gas–particle partitioning of polychlorinated biphenyls over the northwestern Pacific Ocean
作者: Wu Z; , Lin T; , Li Z; , Li Y; , Guo T; , Guo Z
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 167
起始页码: 487
结束页码: 495
语种: 英语
英文关键词: East asian continental outflow ; Gas–particle partitioning ; Northwestern pacific ocean ; PCBs ; Transport mass
Scopus关键词: Carbon ; Gases ; Oceanography ; Organic pollutants ; Polychlorinated biphenyls ; Soot ; Continental air mass ; Continental outflow ; Emission inventories ; Long range transport ; Pacific ocean ; Partition coefficient ; Polychlorinated biphenyl (PCBs) ; Transport mass ; Atmospheric movements ; octanol ; polychlorinated biphenyl ; adsorption ; aerosol ; air mass ; atmospheric chemistry ; concentration (composition) ; emission inventory ; long range transport ; mass transport ; outflow ; partitioning ; PCB ; soot ; adsorption ; aerosol ; air ; air sampling ; Article ; atmosphere ; China ; East Asian ; environmental temperature ; gas ; ocean environment ; prediction ; priority journal ; sea ; seashore ; soot ; spring ; temperature dependence ; transport medium ; East China Sea ; Far East ; Pacific Ocean ; Pacific Ocean (Northwest) ; Acacia koa
Scopus学科分类: Environmental Science: Water Science and Technology ; Earth and Planetary Sciences: Earth-Surface Processes ; Environmental Science: Environmental Chemistry
英文摘要: Ship-board air samples were collected during March to May 2015 from the East China Sea (ECS) to the northwestern Pacific Ocean (NWP) to explore the atmospheric occurrence and gas–particle partitioning of polychlorinated biphenyls (PCBs) when the westerly East Asian Monsoon prevailed. Total PCB concentrations in the atmosphere ranged from 56.8 to 261 pg m−3. Higher PCB levels were observed off the coast and minor temperature-induced changes showed that continuous emissions from East Asia remain as an important source to the regional atmosphere. A significant relationship between Koa (octanol–air partition coefficient) and KP (gas–particle partition coefficient) for PCBs was observed under continental air masses, suggesting that land-derived organic aerosols affected the PCB gas–particle partitioning after long-range transport, while an absence of this correlation was identified in marine air masses. The PCB partitioning cannot be fully explained by the absorptive mechanism as the predicted KP were found to be 2–3 orders of magnitude lower than the measured Kp, while the prediction was closely matched when soot adsorption was considered. The results suggested the importance of soot carbon as a transport medium for PCBs during their long-range transport and considerable impacts of continental outflows on PCBs across the downwind area. The estimated transport mass of particulate PCBs into the ECS and NWP totals 2333 kg during the spring, constituting ca. 17% of annual emission inventories of unintentionally produced PCB in China. © 2017 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82288
Appears in Collections:气候变化事实与影响

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作者单位: Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Institute of Atmospheric Sciences, Department of Environmental Science and Engineering, Fudan University, Shanghai, China; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China

Recommended Citation:
Wu Z,, Lin T,, Li Z,et al. Atmospheric occurrence, transport and gas–particle partitioning of polychlorinated biphenyls over the northwestern Pacific Ocean[J]. Atmospheric Environment,2017-01-01,167
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