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

	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, Jinming1,2,3,4 ; Li, Xuegang 1,2,3,4; Yuan, Huamao 1,2,3,4
	2023
发表期刊	CONTINENTAL SHELF RESEARCH
ISSN	0278-4343
卷号	252 页码:13
通讯作者	Duan, Liqin(duanliqin@qdio.ac.cn)
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.
关键词	Redox sensitive elements Porewater Authigenic enrichment Hypoxia response
DOI	10.1016/j.csr.2022.104902
收录类别	SCI
语种	英语
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研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000992296500001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS关键词	SUBMARINE GROUNDWATER DISCHARGE ; DISSOLVED MOLYBDENUM ; EARLY DIAGENESIS ; COASTAL WATERS ; RIVER ESTUARY ; TRACE-METALS ; PORE WATERS ; URANIUM DISTRIBUTION ; GLOBAL-OCEAN ; VANADIUM
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/183060
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
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,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.