气候变化领域集成服务门户(CCPortal): Microplastics in the Koshi River, a remote alpine river crossing the Himalayas from China to Nepal

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DOI	10.1016/j.envpol.2021.118121
	Microplastics in the Koshi River, a remote alpine river crossing the Himalayas from China to Nepal
	Yang, Ling; Luo, Wei; Zhao, Pin; Zhang, Yulan; Kang, Shichang; Giesy, John P.; Zhang, Fan
通讯作者	Luo, W (通讯作者)，Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Lab Solid Waste Treatment & Recycling, Beijing 100085, Peoples R China.
发表日期	2021
ISSN	0269-7491
EISSN	1873-6424
卷号	290
英文摘要	Studies of microplastics (MPs) in remote, trans-boundary and alpine rivers are currently lacking. To understand the sinks and transport mechanisms of MPs, this study investigated the distributions and sources of MPs in the surface waters and sediments of five tributaries of the Koshi River (KR), a typical alpine river in the Himalayas between China and Nepal. Mean abundances of MPs in water and sediment were 202 +/- 100 items/m3 and 58 +/- 27 items/kg, dry weight, respectively. The upstream tributary, Pum Qu in China, had the smallest abundance of MPs, while the middle tributary, Sun Koshi in Nepal, had the greatest abundance. Compared to international values in rivers, contamination of the KR with MPs was low to moderate. Fibers represented 98% of all MP particles observed, which consisted of polyethylene, polyethyleneterephthalate, polyamide, polypropylene, and polystyrene. Blue and black MPs were prevalent, and small MPs (<1 mm) accounted for approximately 60% of all MPs. Atmospheric transmission and deposition were considered to be the principal sources of MPs in the upstream tributary. The results imply that point sources associated with mostly untreated sewage effluents and solid wastes from households, major settlements, towns, and cities were most important sources of MPs in the KR. Non-point sources from agricultural runoff and atmospheric transport and deposition in the middle stream tributaries also contribute a part of microplastics, while the least amount was from fishing in the downstream tributary. Urbanization, agriculture, traffic, and tourism contributed to pollution in the KR by MPs. Equations to predict abundances of MPs based on river altitudes revealed that different trends were affected by both natural and human factors within the KR basin. This study presents new insights into the magnitude of MP pollution of a remote alpine river and provides valuable data for developing MP monitoring and mitigation strategies in similar environments worldwide.
关键词	PEARL RIVER ORGANIC-MATTER SURFACE WATERS BAGMATI RIVER SOLID-WASTE LAND-USE SEDIMENTS BASIN POLLUTION ABUNDANCE
英文关键词	Plastic debris; Remote area; Mountain; Freshwater; Sediment
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000696711900008
来源期刊	ENVIRONMENTAL POLLUTION
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254816
作者单位	[Yang, Ling; Luo, Wei; Zhao, Pin] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Lab Solid Waste Treatment & Recycling, Beijing 100085, Peoples R China; [Yang, Ling; Zhang, Yulan; Kang, Shichang] Chinese Acad Sci, Northwest Inst Ecoenvironment & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China; [Zhang, Yulan; Kang, Shichang] Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; [Zhang, Fan] Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China; [Yang, Ling; Luo, Wei; Zhao, Pin; Kang, Shichang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Giesy, John P.] Univ Saskatchewan, Toxicol Program Fac, Toxicol Ctr, Saskatoon, SK S7N 5B3, Canada; [Giesy, John P.] Baylor Univ, Dept Environm Sci, Waco, TX 76798 USA
推荐引用方式 GB/T 7714	Yang, Ling,Luo, Wei,Zhao, Pin,et al. Microplastics in the Koshi River, a remote alpine river crossing the Himalayas from China to Nepal[J]. 中国科学院西北生态环境资源研究院,2021,290.
APA	Yang, Ling.,Luo, Wei.,Zhao, Pin.,Zhang, Yulan.,Kang, Shichang.,...&Zhang, Fan.(2021).Microplastics in the Koshi River, a remote alpine river crossing the Himalayas from China to Nepal.ENVIRONMENTAL POLLUTION,290.
MLA	Yang, Ling,et al."Microplastics in the Koshi River, a remote alpine river crossing the Himalayas from China to Nepal".ENVIRONMENTAL POLLUTION 290(2021).