气候变化领域集成服务门户(CCPortal): Spatial distribution patterns and human exposure risks of polycyclic aromatic hydrocarbons, organochlorine pesticides and polychlorinated biphenyls in Nepal using tree bark as a passive air sampler

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DOI	10.1016/j.envres.2020.109510
	Spatial distribution patterns and human exposure risks of polycyclic aromatic hydrocarbons, organochlorine pesticides and polychlorinated biphenyls in Nepal using tree bark as a passive air sampler
	Wang, Xiaoyan; Gong, Ping; Wang, Chuanfei; Wang, Xiaoping; Pokhrel, Balram; Dotel, Jagdish
通讯作者	Wang, CF ; Wang, XP (通讯作者)
发表日期	2020
ISSN	0013-9351
EISSN	1096-0953
卷号	186
英文摘要	Nepal is abutted between the populated Indo-Gangetic Plain (IGP) and Himalayan mountains. Currently, knowledge on the country-wide distribution and cancer risks of atmospheric organic toxicants in Nepal remains limited. In this study, the concentrations, sources, and distributions of polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs), and polychlorinated biphenyls (PCBs), along with their cancer risks, were investigated in Nepal by using tree bark as a passive air sampler. After transferring by a bark/air partitioning model, the averaged concentrations of Sigma PAHs, Sigma DDTs, Sigma HCHs, HCB, Sigma Endo and Sigma PCBs in the atmosphere of Nepal were 3.71 x 10(4) pg/m(3), 1.10 x 10(3) pg/m(3), 2.92 x 10(2) pg/m(3), 4.38 x 10(2) pg/m(3), 4.66 pg/m(3) and 65.8 pg/m(3), respectively. Source diagnosis suggested that biomass burning is the major source for PAHs, while local application and long-range transport jointly contribute to the high levels of DDT and HCH in the air. The ILCR (incremental lifetime cancer risk) value was used to assess the risks of various chemicals. Adults have a higher risk than other age groups; the major exposure pathway for risk is by inhalation; and PAHs and HCHs are the dominant chemical classes that lead to risk. It was also found that, in certain hotspots in south Nepal, the carcinogenic risks caused by DDT and HCH were particularly high (> 1 x 10(-4)). Given that illegal and disordered use of legacy POPs in south Nepal and the IGP region is common, our results highlight an urgent need for voluntary regulation of the ongoing use of pesticides.
关键词	POLYBROMINATED DIPHENYL ETHERS PERSISTENT ORGANIC POLLUTANTS BIOMASS BURNING EMISSIONS LONG-RANGE TRANSPORT LUNG-CANCER RISK SOURCE APPORTIONMENT INHALATION EXPOSURE AGRICULTURAL REGIONS ATMOSPHERIC AEROSOLS SEASONAL-VARIATIONS
英文关键词	PAHs; OCPs; PCBs; Tree bark; Nepal; Cancer risk
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Public, Environmental & Occupational Health
WOS类目	Environmental Sciences ; Public, Environmental & Occupational Health
WOS记录号	WOS:000548186300044
来源期刊	ENVIRONMENTAL RESEARCH
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/259963
推荐引用方式 GB/T 7714	Wang, Xiaoyan,Gong, Ping,Wang, Chuanfei,et al. Spatial distribution patterns and human exposure risks of polycyclic aromatic hydrocarbons, organochlorine pesticides and polychlorinated biphenyls in Nepal using tree bark as a passive air sampler[J]. 中国科学院青藏高原研究所,2020,186.
APA	Wang, Xiaoyan,Gong, Ping,Wang, Chuanfei,Wang, Xiaoping,Pokhrel, Balram,&Dotel, Jagdish.(2020).Spatial distribution patterns and human exposure risks of polycyclic aromatic hydrocarbons, organochlorine pesticides and polychlorinated biphenyls in Nepal using tree bark as a passive air sampler.ENVIRONMENTAL RESEARCH,186.
MLA	Wang, Xiaoyan,et al."Spatial distribution patterns and human exposure risks of polycyclic aromatic hydrocarbons, organochlorine pesticides and polychlorinated biphenyls in Nepal using tree bark as a passive air sampler".ENVIRONMENTAL RESEARCH 186(2020).