Composition of organic sulfur in riverine and marine sediments: Insights from sulfur stable isotopes and XANES spectroscopy
Zhu, MX; Chen, LJ; Yang, GP; Huang, XL; Zhao, YD; Zhao YD(赵屹东)
刊名ORGANIC GEOCHEMISTRY
2016
卷号99页码:102-112
关键词Organic sulfur Sulfur isotopes XANES Sediments East China Sea Jiaozhou Bay
DOI10.1016/j.orggeochem.2016.07.002
文章类型期刊论文
英文摘要Sulfur isotopes and X-ray absorption near edge structure (XANES) spectroscopy were combined to characterize/compare three operational organic sulfur (OS) pools, i.e. fulvic acid sulfur (FA-S), humic acid sulfur (HA-S) and non-chromium reducible organic sulfur (non-CROS) in marine [the East China Sea (ECS) and Jiaozhou Bay (JZB)] vs. riverine [Yangtze River (YR) and JZB tributaries] sediments. XANES results indicate that in marine sediments high valency S was the dominant OS functionality in both HA -S and FA -S, while non-CROS was dominated by low valency OS (80-92%). In the riverine sediments FA -S was dominated by high valency OS, while the average fractions of low and high valency OS in HA -S were comparable. The isotopic composition of FA-S (634SFA-s) and HA-S (634SuA-s) indicated that a substantial fraction of sulfide was incorporated into FA via sulfurization in the marine sediments, whereas terrigenous OS was almost the sole important source of HA -S. Compared with the ECS sediments, JZB sediments had more depleted 34SFA_s and a higher fraction of highly reduced FA -S due to eutrophication induced sulfurization. Relative to riverine FA -S, substantial sulfurization had not resulted in an increase in the fraction of highly reduced FA -S in marine sediments. This implies that the terrestrial systems may be much more favorable for the formation and/or preservation of highly reduced biogenic FA -S than the marine settings. The fraction of highly reduced HA -S in the JZB and its tributaries was similar, whereas the fraction was much lower in the ECS than in the YR. This indicates that highly reduced HA -S moieties in the YR may have been subject to extensive mineralization loss during transport in the large riverine/estuarine system, whereas the process in the JZB tributaries may be much weakened due to a relatively small catchment area. Distinct differences in isotopic and structural composition between humic-S (FA-S + HA-S) and non-CROS in the ECS sediments indicate that a combination of S isotopes and S-XANES is needed for characterizing the two operational pools for a better understanding the nature of OS in the ocean. (C) 2016 Elsevier Ltd. All rights reserved.
类目[WOS]Geochemistry & Geophysics
关键词[WOS]X-RAY-ABSORPTION ; NEAR-EDGE STRUCTURE ; EAST CHINA SEA ; EARLY DIAGENETIC FORMATION ; EUTROPHIC JIAOZHOU BAY ; SOIL HUMIC SUBSTANCES ; FULVIC-ACIDS ; ESTUARINE SEDIMENTS ; CONTINENTAL-SHELF ; INORGANIC SULFUR
语种英语
WOS记录号WOS:000381578000009
引用统计
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/260345
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
中国科学院高能物理研究所_多学科研究中心
作者单位中国科学院高能物理研究所
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GB/T 7714
Zhu, MX,Chen, LJ,Yang, GP,et al. Composition of organic sulfur in riverine and marine sediments: Insights from sulfur stable isotopes and XANES spectroscopy[J]. ORGANIC GEOCHEMISTRY,2016,99:102-112.
APA Zhu, MX,Chen, LJ,Yang, GP,Huang, XL,Zhao, YD,&赵屹东.(2016).Composition of organic sulfur in riverine and marine sediments: Insights from sulfur stable isotopes and XANES spectroscopy.ORGANIC GEOCHEMISTRY,99,102-112.
MLA Zhu, MX,et al."Composition of organic sulfur in riverine and marine sediments: Insights from sulfur stable isotopes and XANES spectroscopy".ORGANIC GEOCHEMISTRY 99(2016):102-112.
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