Dynamic mobilization of redox sensitive elements Mo, U and V in seasonal hypoxic sediments off the Changjiang Estuary

doi:10.1016/j.csr.2022.104902

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋生态与环境科学重点实验室

	Dynamic mobilization of redox sensitive elements Mo, U and V in seasonal hypoxic sediments off the Changjiang Estuary
	Duan, Liqin 1,2,3,4; Song, Jinming 1,2,3,4; Li, Xuegang 1,2,3,4; Yuan, Huamao 1,2,3,4
刊名	CONTINENTAL SHELF RESEARCH
	2023
卷号	252 页码:13
关键词	Redox sensitive elements Porewater Authigenic enrichment Hypoxia response
ISSN号	0278-4343
DOI	10.1016/j.csr.2022.104902
通讯作者	Duan, Liqin(duanliqin@qdio.ac.cn)
英文摘要	The coastal waters off the Changjiang Estuary are a seasonal hypoxic region, offering an ideal system for studying the geochemical cycles of redox sensitive elements (RSEs) at the sediment-water interface (SWI) and their response potential to redox changes. The profiles of porewater and solid RSEs and their chemical speciation and diffusive fluxes at five sites in two seasons were studied to evaluate the migration and removal of RSEs at the SWI off the Changjiang Estuary. Results showed that porewater and solid RSEs displayed the corresponding profile variations. The porewater Mo and U concentrations generally decreased with depth, attributed to the reductive removal. Particularly, the removal of Mo may be mediated by the Fe-S phase, and the removal of U appears to be via the microbially-mediated reduction. Porewater V, U and Mo were removed successively with depth, corresponding to the peaks of dissolved nitrate, Fe2+ and acid volatile sulfur (AVS). However, porewater V increased again in the deep layers due to its complexation with dissolved organic matter. The upward shift of RSE peaks in porewater and transformation depths of their oxidation states based on the model from spring to summer reflected the occurrence of hypoxia in summer. The downward diffusive fluxes of RSEs at hypoxic site in summer indicated their hypoxia-induced enrichment. The Mo-U covariation suggested that the seasonal hypoxic sites off the Changjiang Estuary were more favorable for the accumulation of authigenic U.
资助项目	National Natural Science Foundation of China[41976037] ; Shandong Provincial Natural Science Foundation[ZR2020YQ28] ; Taishan Scholars Program, Wenhai Plan Program - Qingdao National Laboratory for Marine Science and Technology[2021WHZZB0903]
WOS关键词	SUBMARINE GROUNDWATER DISCHARGE ; DISSOLVED MOLYBDENUM ; EARLY DIAGENESIS ; COASTAL WATERS ; RIVER ESTUARY ; TRACE-METALS ; PORE WATERS ; URANIUM DISTRIBUTION ; GLOBAL-OCEAN ; VANADIUM
WOS研究方向	Oceanography
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000992296500001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/183059]
专题	海洋研究所_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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Duan, Liqin,Song, Jinming,Li, Xuegang,et al. Dynamic mobilization of redox sensitive elements Mo, U and V in seasonal hypoxic sediments off the Changjiang Estuary[J]. CONTINENTAL SHELF RESEARCH,2023,252:13.
APA	Duan, Liqin,Song, Jinming,Li, Xuegang,&Yuan, Huamao.(2023).Dynamic mobilization of redox sensitive elements Mo, U and V in seasonal hypoxic sediments off the Changjiang Estuary.CONTINENTAL SHELF RESEARCH,252,13.
MLA	Duan, Liqin,et al."Dynamic mobilization of redox sensitive elements Mo, U and V in seasonal hypoxic sediments off the Changjiang Estuary".CONTINENTAL SHELF RESEARCH 252(2023):13.