Role of marine algal blooms in the release of arsenic at the sediment-seawater interface: Evidence from microcosm experiments

doi:10.1016/j.watres.2023.120508

	Role of marine algal blooms in the release of arsenic at the sediment-seawater interface: Evidence from microcosm experiments
	Duan, Liqin 1,2,3,4; Song, Jinming1,2,3,4 ; Zhang, Yuting 1,3; Yuan, Huamao 1,2,3,4; Li, Xuegang 1,2,3,4; Sun, Lingling 1,5
	2023-10-01
发表期刊	WATER RESEARCH
ISSN	0043-1354
卷号	244 页码:11
通讯作者	Duan, Liqin(duanliqin@qdio.ac.cn)
摘要	Algal blooms can aggravate arsenic (As) release from sediments and thus pose a pollution risk in the marine environment. However, the driving mechanism of algal blooms on sedimentary As cycling remains unclear. This study undertakes the first comprehensive examination of As release mechanisms under algal bloom conditions based on the evidence provided by temporal and depth profile changes of As species in the overlying water column, porewater and sediment, as well as As-related functional genes over the course of a 30-day incubation experiment using algal addition. The higher rate of increase of dissolved total As (dTAs) concentrations in a high biomass algal group (HAG) than an experimental control group (CG) suggested that algal degradation promoted the release of sedimentary As. The solid phase in all experimental groups remained rich in As(V), while in porewater As(III) and As(V) were the dominant As species during the initial rapid and subsequent slow degradation phases of organic matter, respectively, indicating that microbial reduction of As(V) and Fe(III) controlled the release of As during these two periods. A pronounced increase in arrA gene copies, and not a corresponding increase in the Geobacter copies, in HAG relative to CG supported the notion that algal blooms promoted microbial As(V) reduction. Additionally, the lower concentration of dissolved As(III) and cumulative dTAs flux in the sterilized-HAG treatment than in the sterilized-CG one further suggested that geochemically-mediated processes were not the main pathways of As release. Finally, it is estimated that summer algal blooms in the Changjiang Estuary can cause the release of 1440 kg of sedimentary As into the overlying water.
关键词	Arsenic speciation Release pathway Functional gene Sediment-water interface Algal blooms
DOI	10.1016/j.watres.2023.120508
收录类别	SCI
语种	英语
资助项目	Shandong Provincial Natural Science Foundation[ZR2020YQ28] ; National Natural Science Foundation of China[41976037] ; Taishan Scholars Program[tsqn202211256] ; Laoshan Laboratory Science and Technology Innovation Project[LSKJ202205003] ; Yantai Double Hundred Plan Funding Project
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
WOS类目	Engineering, Environmental ; Environmental Sciences ; Water Resources
WOS记录号	WOS:001071646800001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS关键词	NATURAL ORGANIC-MATTER ; PHYTOPLANKTON BIOMASS ; IRON REDUCTION ; TRACE-ELEMENTS ; COASTAL AREA ; WEST-BENGAL ; SPECIATION ; WATER ; EUTROPHICATION ; ADSORPTION
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/181686
专题	海洋生态与环境科学重点实验室
通讯作者	Duan, Liqin
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Publ Technol Serv Ctr, Qingdao 266071, Peoples R China
第一作者单位	海洋生态与环境科学重点实验室
通讯作者单位	海洋生态与环境科学重点实验室
推荐引用方式 GB/T 7714	Duan, Liqin,Song, Jinming,Zhang, Yuting,et al. Role of marine algal blooms in the release of arsenic at the sediment-seawater interface: Evidence from microcosm experiments[J]. WATER RESEARCH,2023,244:11.
APA	Duan, Liqin,Song, Jinming,Zhang, Yuting,Yuan, Huamao,Li, Xuegang,&Sun, Lingling.(2023).Role of marine algal blooms in the release of arsenic at the sediment-seawater interface: Evidence from microcosm experiments.WATER RESEARCH,244,11.
MLA	Duan, Liqin,et al."Role of marine algal blooms in the release of arsenic at the sediment-seawater interface: Evidence from microcosm experiments".WATER RESEARCH 244(2023):11.

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