气候变化领域集成服务门户(CCPortal): Little evidence that dams in the Orange–Vaal River system trap floating microplastics or microfibres

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DOI	10.1016/j.marpolbul.2019.110664
	Little evidence that dams in the Orange–Vaal River system trap floating microplastics or microfibres
	Weideman E.A.; Perold V.; Ryan P.G.
发表日期	2019
ISSN	0025326X
卷号	149
英文摘要	Rivers can be major sources of plastics into coastal seas, but it is unclear whether dams retain floating plastics, thus reducing the amount reaching the sea. To test if dams trap microplastics, we collected bulk water and neuston net samples from five dams on the Orange–Vaal River system, South Africa. Most manufactured items were microfibres and densities of microplastics were modest (bulk water: 0.21 ± 0.27 items·L−1; net: 0.04 ± 0.16 items·m−2). There was an interaction between dam and season: dams on the densely populated Vaal River had higher microplastic concentrations during dry than wet conditions, whereas the opposite pattern occurred on the less industrialised Orange River. Overall there was no difference in microplastic concentration at sites above vs below dam walls nor was there a strong correlation between microplastic concentration and distance to the wall. Our results therefore suggest that dams do not trap floating microplastics or microfibres. © 2019 Elsevier Ltd
英文关键词	Land-based sources; Microfibres; Plastic pollution; Retention rate; Source to sea; Surface water
语种	英语
scopus关键词	Citrus fruits; Elastomers; Microfibers; Microplastic; River pollution; Rivers; Surface waters; Coastal seas; Land-based sources; Microplastics; Plastic pollutions; Retention rate; Source to sea; Strong correlation; Wet conditions; Dams; microfiber; microplastic; nanofiber; plastic; unclassified drug; concentration (composition); correlation; dam; marine pollution; plastic waste; river system; trap (equipment); Article; bulk density; chemical interaction; concentration (parameter); dam (barrier); developed country; dry season; population density; river ecosystem; seashore; seasonal variation; South Africa; volume; water pollution; wet season; Orange River; South Africa; Vaal River
来源期刊	Marine Pollution Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/149465
作者单位	FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, Rondebosch, 7701, South Africa
推荐引用方式 GB/T 7714	Weideman E.A.,Perold V.,Ryan P.G.. Little evidence that dams in the Orange–Vaal River system trap floating microplastics or microfibres[J],2019,149.
APA	Weideman E.A.,Perold V.,&Ryan P.G..(2019).Little evidence that dams in the Orange–Vaal River system trap floating microplastics or microfibres.Marine Pollution Bulletin,149.
MLA	Weideman E.A.,et al."Little evidence that dams in the Orange–Vaal River system trap floating microplastics or microfibres".Marine Pollution Bulletin 149(2019).