In situ redox control and Raman spectroscopic characterisation of solutions below 300 degrees C

doi:10.7185/geochemlet.2135

	In situ redox control and Raman spectroscopic characterisation of solutions below 300 degrees C
	Chou, I. -M.1; Wang, R.1,2 ; Fang, J.1,3
	2021-12-02
发表期刊	GEOCHEMICAL PERSPECTIVES LETTERS
ISSN	2410-339X
卷号	20 页码:19
通讯作者	Chou, I. -M.(imchou@idsse.ac.cn)
摘要	Redox reactions often occur and significantly affect many geological processes. To simulate redox reactions in low temperature (T < 400 degrees C) hydrothermal experiments, fused silica was used as a hydrogen membrane to impose an externally fixed H-2 pressure (P-H2) on a fused silica capillary capsule (FSCC; 150 mu m inner diameter, 375 mu m outer diameter and similar to 6 mm long) to define the redox state of the sample in the FSCC. At 300 degrees C, it required less than 7 hours to reach osmotic equilibrium. In this study, a constant PH2 was imposed on an FSCC, which originally contained a 0.5 m (mole/kg H2O) SnCl4 + 0.5 m HCl aqueous solution, at 300 degrees C and vapour saturation pressure. In situ Raman spectra of the sample solution collected at 300 degrees C show that the reduction rate of Sn-IV to Sn-II species increased substantially with an increase of 1.1 bar of P-H2. We characterised precipitation and dissolution of cassiterite under various P-T-pH-P-H2 conditions and greatly increased our capabilities for performing rigorous hydrothermal experiments at temperatures below 400 degrees C, in which redox control is difficult to ensure without in situ approaches.
DOI	10.7185/geochemlet.2135
收录类别	SCI
语种	英语
资助项目	Key Frontier Science Program of CAS[QYZDY-SSW-DQC008] ; National Natural Science Foundation of China[41973055] ; National Natural Science Foundation of China[4213000358]
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000727023200001
出版者	EUROPEAN ASSOC GEOCHEMISTRY
引用统计	被引频次：7[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/337002/177300
专题	深海极端环境与生命过程研究中心
通讯作者	Chou, I. -M.
作者单位	1.Chinese Acad Sci, Inst Deep sea Sci & Engn, CAS Key Lab Expt Study Deep Sea Extreme Condit, Sanya 572000, Hainan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Chou, I. -M.,Wang, R.,Fang, J.. In situ redox control and Raman spectroscopic characterisation of solutions below 300 degrees C[J]. GEOCHEMICAL PERSPECTIVES LETTERS,2021,20:19.
APA	Chou, I. -M.,Wang, R.,&Fang, J..(2021).In situ redox control and Raman spectroscopic characterisation of solutions below 300 degrees C.GEOCHEMICAL PERSPECTIVES LETTERS,20,19.
MLA	Chou, I. -M.,et al."In situ redox control and Raman spectroscopic characterisation of solutions below 300 degrees C".GEOCHEMICAL PERSPECTIVES LETTERS 20(2021):19.

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