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DOI	10.1016/j.envpol.2020.114143
	Determination of dry deposition velocity of polycyclic aromatic hydrocarbons under the sub-tropical climate and its implication for regional cycling
	Dotel, Jagdish; Gong, Ping; Wang, Xiaoping; Pokhrel, Balram; Wang, Chuanfei; Nawab, Javed
通讯作者	Wang, XP (通讯作者)
发表日期	2020
ISSN	0269-7491
EISSN	1873-6424
卷号	261
英文摘要	Atmospheric dry deposition is a major pathway for removal of polycyclic aromatic hydrocarbons (PAHs) from the atmosphere. Despite its significance in the atmospheric environment, measurements of the dry deposition velocity (V-DD) and deposition fluxes (F-DD) of PAHs are relatively limited. In this study, a passive dry deposition (PAS-DD) collector was co-deployed with passive air sampler polyurethane foam (PAS-PUF) from November 2015 to November 2016 in two major cities (Kathmandu and Pokhara), Nepal, to investigate the V(DD)( )and F-DD of PAHs. The V-DD of PAHs ranged from 0.25 to 0.5 cm s(-1) and the annual average was recorded as 0.37 +/- 0.08 cm s(-1). On the basis of measured V-DD, the F-DD of Sigma 15PAHs in Kathmandu and Pokhara were estimated as 66 and 5 kg yr(-1) respectively. According to the measured V-DD of Kathmandu and Pokhara in this study, and the previously published V-DD data of Toronto, Canada, where the same PAS-DD collector was used, a significant multi-linear correlation (r(2) = 0.79, p < 0.05) was found between V-DD of higher molecular weight (HMW with MW >= 228.3 and >= 4 rings) PAHs and meteorological parameters (precipitation and wind speed) and vapor pressure of PAHs. To the best of our knowledge, this enabled the development of an empirical model that can exhibit the combined effects of meteorological conditions on the V-DD of HMW PAHs. The model was used to estimate the V-DD values for major cities in the Indo-Gangetic Plain (IGP) region and the maximum estimated proportion of HMW PAHs deposited by dry deposition reached up to 60% of total emissions. Although PAH emissions in the IGP region pose global risks, the results of this study highlight the considerable risk for local IGP residents, due to the large dry deposition proportion of HMW PAHs. (C) 2020 Elsevier Ltd. All rights reserved.
关键词	PERSISTENT ORGANIC POLLUTANTS PASSIVE AIR SAMPLERS LONG-RANGE TRANSPORT INDO-GANGETIC PLAINS ATMOSPHERIC DEPOSITION SOURCE APPORTIONMENT ORGANOCHLORINE PESTICIDES URBAN ATMOSPHERE SEASONAL TRENDS HONG-KONG
英文关键词	dry deposition fluxes; dry deposition velocity; PAS-DD; Polycyclic aromatic hydrocarbons
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000531106500002
来源期刊	ENVIRONMENTAL POLLUTION
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259829
推荐引用方式 GB/T 7714	Dotel, Jagdish,Gong, Ping,Wang, Xiaoping,et al. Determination of dry deposition velocity of polycyclic aromatic hydrocarbons under the sub-tropical climate and its implication for regional cycling[J]. 中国科学院青藏高原研究所,2020,261.
APA	Dotel, Jagdish,Gong, Ping,Wang, Xiaoping,Pokhrel, Balram,Wang, Chuanfei,&Nawab, Javed.(2020).Determination of dry deposition velocity of polycyclic aromatic hydrocarbons under the sub-tropical climate and its implication for regional cycling.ENVIRONMENTAL POLLUTION,261.
MLA	Dotel, Jagdish,et al."Determination of dry deposition velocity of polycyclic aromatic hydrocarbons under the sub-tropical climate and its implication for regional cycling".ENVIRONMENTAL POLLUTION 261(2020).