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

doi:10.7185/geochemlet.2135

CORC > 海洋研究所 > 中国科学院海洋研究所 > 深海极端环境与生命过程研究中心

	In situ redox control and Raman spectroscopic characterisation of solutions below 300 degrees C
	Chou, I. -M.3; Wang, R.1,3; Fang, J.2,3
刊名	GEOCHEMICAL PERSPECTIVES LETTERS
	2021-12-02
卷号	20 页码:19
ISSN号	2410-339X
DOI	10.7185/geochemlet.2135
通讯作者	Chou, I. -M.(imchou@idsse.ac.cn)
英文摘要	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.
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
语种	英语
出版者	EUROPEAN ASSOC GEOCHEMISTRY
WOS记录号	WOS:000727023200001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/177299]
专题	海洋研究所_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.Univ Chinese Acad Sci, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Inst Deep sea Sci & Engn, CAS Key Lab Expt Study Deep Sea Extreme Condit, Sanya 572000, Hainan, 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.