Impact of eutrophication on arsenic cycling in freshwaters

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境纳米材料实验室

	Impact of eutrophication on arsenic cycling in freshwaters
	Tang, Ying ; Zhang, Meiyi ; Sun, Guoxin ; Pan, Gang
刊名	WATER RESEARCH
	2019-03-01
卷号	150 页码:191-199
关键词	Harmful algae bloom Arsenic volatilization Organic matter Arsenic metabolism functional genes Sediment-water-air interfaces X-ray absorption spectroscopy
ISSN号	0043-1354
英文摘要	Many arsenic-bearing freshwaters are facing with eutrophication and consequent algae-induced anoxia/ hypoxia events. However, arsenic cycling in eutrophic waters and its impact on public health are poorly understood. Laboratory simulation experiments are performed in this study to investigate the effect of algal blooms on the cycling of arsenic in a sediment-water-air system. We found that the anoxia induced by the degradation of algal biomass promoted an acute arsenic (mostly As(III)) release within two days from sediment to both the water and atmosphere, and the release effluxes were proportional to the algae dosage. The reduction and methylation of arsenic were enhanced at the sediment-water interface, owing to the significant increase in arsenate reductase genes (arrA and arsC), and arsenite methyltransferase genes (arsM) caused by increased anoxia. The analysis of synchrotron-based X-ray absorption spectroscopy indicated that the concomitantly released natural organic matter (NOM) and sulfur (S) at the sediment water interface reduced the As(III) release to a certain extent in the later reducing period of incubation, by forming As2S3 (43-51%) and As(III)-Fe-NOM (28-35%). Our results highlight the needs for the in-situ assessment of volatile arsenic in eutrophic freshwaters with its risk to human and animal health. (C) 2018 The Authors. Published by Elsevier Ltd.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43198]
专题	生态环境研究中心_环境纳米材料实验室
作者单位	1.Nottingham Trent Univ, Sch Anim Rural & Environm Sci, Ctr Integrated Water Energy Food Studies iWEF, Brackenhurst Campus, Nottingham NG25 0QF, England 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Nanotechnol & Hlth Effects, Beijing 100085, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Tang, Ying,Zhang, Meiyi,Sun, Guoxin,et al. Impact of eutrophication on arsenic cycling in freshwaters[J]. WATER RESEARCH,2019,150:191-199.
APA	Tang, Ying,Zhang, Meiyi,Sun, Guoxin,&Pan, Gang.(2019).Impact of eutrophication on arsenic cycling in freshwaters.WATER RESEARCH,150,191-199.
MLA	Tang, Ying,et al."Impact of eutrophication on arsenic cycling in freshwaters".WATER RESEARCH 150(2019):191-199.