Sulfur Speciation in the Surface Sediments of Lakes from Different Regions, China: Characterization by S K-Edge XANES Spectroscopy

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	Sulfur Speciation in the Surface Sediments of Lakes from Different Regions, China: Characterization by S K-Edge XANES Spectroscopy
	Ma Chenyan; Yang Haiquan; Dai Zhihui; Chen Jingan; Wang Jingfu
刊名	Journal of Chemistry
	2016
期号	3 页码:1-9
英文摘要	X-ray absorption near edge structure (XANES) spectroscopy affords the opportunity to determine redox status for element S in the aquatic ecosystems. However, there have been relatively few studies of S XANES spectroscopy in the terrestrial aquatic ecosystems. In this study, XANES technology was used to examine changes in S speciation in the sediments collected from Taihu Lake, Qinghai Lake, Dianchi Lake, Caohai Lake, and Hongfeng Lake located in distinct geological background areas of China. The results showed that sedimentary S in Qinghai Lake has a high proportion of sulfate averaged 88.9% due to physical weathering of watershed rocks, while deposited S in Taihu Lake has a high fraction of intermediate S (36.5%), which may be the response of the agricultural nonpoint source pollution in drainage basin. The three lakes located in Southwest China have similar composition characteristics of S species, indicating similar S sources including chemical weathering of carbonate and atmospheric deposition. 60-90% of S compounds in the surface sediments were in the form of sulfate and FeS. In deeper layers, the ratio of FeS 2 and the intermediate S significantly increased, suggesting rapid processes of sulfate reduction and sulfide reoxidation with the increasing depths.
学科主题	环境地球化学
语种	英语
公开日期	2017-09-13
内容类型	期刊论文
源URL	[http://ir.gyig.ac.cn:8080/handle/352002/6194]
专题	地球化学研究所_环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Ma Chenyan,Yang Haiquan,Dai Zhihui,et al. Sulfur Speciation in the Surface Sediments of Lakes from Different Regions, China: Characterization by S K-Edge XANES Spectroscopy[J]. Journal of Chemistry,2016(3):1-9.
APA	Ma Chenyan,Yang Haiquan,Dai Zhihui,Chen Jingan,&Wang Jingfu.(2016).Sulfur Speciation in the Surface Sediments of Lakes from Different Regions, China: Characterization by S K-Edge XANES Spectroscopy.Journal of Chemistry(3),1-9.
MLA	Ma Chenyan,et al."Sulfur Speciation in the Surface Sediments of Lakes from Different Regions, China: Characterization by S K-Edge XANES Spectroscopy".Journal of Chemistry .3(2016):1-9.