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Behavior of redox-sensitive elements during weathering of granite in subtropical area using X-ray absorption fine structure spectroscopy

文献类型：期刊论文

作者Zhang, Zhuo-Jun1,2; Liu, Cong-Qiang1,3; Zhao, Zhi-Qi1; Cui, Li-Feng1,2; Liu, Wen-Jing3; Liu, Tao-Ze1; Liu, Bao-Jian1,4; Fan, Bai-Ling1,2
刊名JOURNAL OF ASIAN EARTH SCIENCES
出版日期2015-06-01
卷号105页码:418-429
关键词Redox-sensitive elements Granite Chemical weathering XAFS Speciation Mobilization
DOI10.1016/j.jseaes.2015.02.015
文献子类Article
英文摘要The variation in chemical compositions of regolith along a weathering profile developed on a granite substrate in Jiangxi province, in southern China, was investigated in this paper, with the aim to characterize the speciation of redox-sensitive elements and to evaluate their mobility and redistribution during chemical weathering. Mass balance calculations indicate titanium (Ti) is the most immobile element in this weathering profile. A new method, X-ray absorption fine structure (XAFS) spectroscopy, was used to determine the speciation of Fe and Mn along the profile. Fe K-edge X-ray absorption near edge structure (XANES) spectra show Fe in saprolith is stabilized mainly in the state of Fe(III), suggesting Fe is as immobile as conservative elements during granite weathering. Mn K-edge XANES spectra show Mn (III/IV) oxides are reduced to Mn(II) in surface soil, where soil organic matter (SOM) acts as an important reductant. Although Ce, Co and V were unable to be analysed by XAFS, their concentrations have significant correlations with that of Mn, indicating that the mobilization and redistribution of Ce, Co and V may also be governed by redox condition. All in all, the results suggest that redox process impacts significantly on the redistribution of Mn, Ce, Co and V along the profile. The successful application of XAFS in the study on migration of redox-sensitive elements during granite chemical weathering has provided valuable information for the understanding and evaluating the geochemical behavior of elements in the environment. (C) 2015 Elsevier Ltd. All rights reserved.
WOS关键词RARE-EARTH-ELEMENTS ; MASS-BALANCE ; ORGANIC-MATTER ; TRACE-ELEMENTS ; WETLAND SOILS ; MOBILITY ; RELEASE ; ROCKS ; FE ; MOBILIZATION
WOS研究方向Geology
语种英语
WOS记录号WOS:000355051700027
资助机构National Natural Science Foundation of China(41130536 ; National Natural Science Foundation of China(41130536 ; Ministry of Science and Technology of China through the National Basic Research Program of China ('973'Program)(2013CB956401) ; Ministry of Science and Technology of China through the National Basic Research Program of China ('973'Program)(2013CB956401) ; 41173030 ; 41173030 ; 41210004) ; 41210004) ; National Natural Science Foundation of China(41130536 ; National Natural Science Foundation of China(41130536 ; Ministry of Science and Technology of China through the National Basic Research Program of China ('973'Program)(2013CB956401) ; Ministry of Science and Technology of China through the National Basic Research Program of China ('973'Program)(2013CB956401) ; 41173030 ; 41173030 ; 41210004) ; 41210004)
源URL[http://ir.iggcas.ac.cn/handle/132A11/62505]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
作者单位1.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Engn Geomech, Beijing 100029, Peoples R China
4.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Zhuo-Jun,Liu, Cong-Qiang,Zhao, Zhi-Qi,et al. Behavior of redox-sensitive elements during weathering of granite in subtropical area using X-ray absorption fine structure spectroscopy[J]. JOURNAL OF ASIAN EARTH SCIENCES,2015,105:418-429.
APA Zhang, Zhuo-Jun.,Liu, Cong-Qiang.,Zhao, Zhi-Qi.,Cui, Li-Feng.,Liu, Wen-Jing.,...&Fan, Bai-Ling.(2015).Behavior of redox-sensitive elements during weathering of granite in subtropical area using X-ray absorption fine structure spectroscopy.JOURNAL OF ASIAN EARTH SCIENCES,105,418-429.
MLA Zhang, Zhuo-Jun,et al."Behavior of redox-sensitive elements during weathering of granite in subtropical area using X-ray absorption fine structure spectroscopy".JOURNAL OF ASIAN EARTH SCIENCES 105(2015):418-429.

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来源：地质与地球物理研究所

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