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Sci Total Environ

Title:		Conversion mechanisms between organic sulfur and inorganic sulfur in surface sediments in coastal rivers
Author(s):		Jiang M; Sheng Y; Liu Q; Wang W; Liu X;
Address:		"Research Center for Coastal Environment Engineering Technology of Shandong Province, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China; University of Chinese Academy of Sciences, Beijing, China. Research Center for Coastal Environment Engineering Technology of Shandong Province, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China. Electronic address: yqsheng@yic.ac.cn. Research Center for Coastal Environment Engineering Technology of Shandong Province, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China"
Journal Title:		Sci Total Environ
Year:		2021
Volume:		20200820
Issue:
Page Number:		141829 -
DOI:		10.1016/j.scitotenv.2020.141829
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"Geochemical processes of sulfur (S) in river aquatic systems play a crucial role in environmental evolution. In this study, the distributions and sources of reduced inorganic sulfur (RIS) and organic sulfur (OS) in coastal river surface sediments were investigated. The results indicated that OS dominated total S (80%), and OS (i.e., humic acid sulfur, HAS; fulvic acid sulfur, FAS) correlated with the availability of labile organic matter (OM) and reactive iron (Fe). Terrigenous inputs and sulfurization contributed to the enrichment of FAS through the S reduction. Autochthonous biological inputs were potential sources of HAS from S oxidization. The X-ray photoelectron spectroscopy showed that the main sources of S in surface sediments were deposited as the form of organic ester-sulfate. Aquatic life could break S down further, producing reduced S compounds accumulated as thiols and RIS in anoxic sediments. RIS was dominated by acid volatile sulfur (AVS) and chromium (II)-reducible sulfur (CRS). Reactive Fe oxides were major control factors for the conversation from hydrogen sulfide (H(2)S) to AVS, whereas elemental sulfide (ES) controlled the conversion from AVS into CRS in coastal rivers"
Keywords:		Buffer capacity Coastal rivers Inorganic sulfur Organic sulfur Sediment;
Notes:		"PubMed-not-MEDLINEJiang, Ming Sheng, Yanqing Liu, Qunqun Wang, Wenjing Liu, Xiaozhu eng Netherlands 2020/11/20 Sci Total Environ. 2021 Jan 15; 752:141829. doi: 10.1016/j.scitotenv.2020.141829. Epub 2020 Aug 20"