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Quantitative in situ Raman analysis of formate salt solutions at 25-350 °C and 0.1-40 MPa: implications for formate distribution on earth

文献类型：期刊论文

作者Xi, Shichuan2; Huang, Ruifang3,4,5; Luan, Zhendong1,3; Du, Zengfeng1,3; Li, Lianfu2; Zhang, Xin1,2,3
刊名SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
出版日期2026-01-15
卷号345页码:9
关键词Formate Raman spectroscopy Quantitative analysis Hydrothermal condition Thermal stability
ISSN号1386-1425
DOI10.1016/j.saa.2025.126822
通讯作者Huang, Ruifang(ruifanghuang_geo@163.com) ; Zhang, Xin(xzhang@qdio.ac.cn)
英文摘要Formate (HCOO-) is widely detected in diverse high-temperature geological environments, including hydrothermal vents and the deep lithosphere, where it plays a crucial role in supporting microbial communities. However, the thermal stability of formate remains poorly constrained, and a robust in situ Raman quantitative model for determining HCOO- concentrations across a range of temperatures and pressures is lacking. In this study, we developed a Raman quantitative model for formate applicable at 25-350 degrees C and 0.1-40 MPa. In situ formate concentrations were calibrated using the linear relationship AFormate/AH2O = 0.0095CFormate (R2 = 0.999). Using this model, we investigated the thermal stability of 50-300 mmol/kg sodium formate (NaHCOO) solutions under conditions of 25-350 degrees C and 0.1-40 MPa. In situ results demonstrate that NaHCOO solutions remain stable at temperatures of <= 300 degrees C, but decompose primarily to H2 and CO2 production above 350 degrees C. Particularly, formate decomposition rates at 350 degrees C were several orders of magnitude slower than previously reported. This study indicates that abiotic formate is likely more widespread in diverse geological settings than previously recognized and serves as a significant hydrogen source within the deep lithosphere.
WOS关键词CARBON-DIOXIDE ; HYDROTHERMAL VENT ; OPTICAL-CELL ; FORMIC-ACID ; DECOMPOSITION ; ORIGIN ; FLUIDS ; CO2 ; SERPENTINIZATION ; CALIBRATION
资助项目National Natural Science Foundation of China[42206190] ; National Natural Science Foundation of China[42327805] ; National Natural Science Foundation of China[42221005] ; Natural Science Foundation of Shandong Province[ZR2024MD012] ; National Key Research and Development Program of China[2023YFF0807101] ; Key Programs of Guangzhou Nansha District Science and Technology Bureau[2023ZD018]
WOS研究方向Spectroscopy
语种英语
WOS记录号WOS:001694103300001
出版者PERGAMON-ELSEVIER SCIENCE LTD
源URL[http://ir.qdio.ac.cn/handle/337002/204790]  
专题海洋研究所_海洋地质与环境重点实验室
通讯作者Huang, Ruifang; Zhang, Xin
作者单位1.Chinese Acad Sci, Key Lab Ocean Observat & Forecasting, Key Lab Marine Geol & Environm, Ctr Ocean Mega Sci,Inst Oceanol,CAS, Qingdao 266071, Peoples R China
2.Laoshan Lab, 168,Wenhai Middle Rd, Qingdao 266237, Shandong, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Oceanog, Guangzhou 510301, Peoples R China
5.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China
推荐引用方式
GB/T 7714		 Xi, Shichuan,Huang, Ruifang,Luan, Zhendong,et al. Quantitative in situ Raman analysis of formate salt solutions at 25-350 °C and 0.1-40 MPa: implications for formate distribution on earth[J]. SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,2026,345:9.
APA Xi, Shichuan,Huang, Ruifang,Luan, Zhendong,Du, Zengfeng,Li, Lianfu,&Zhang, Xin.(2026).Quantitative in situ Raman analysis of formate salt solutions at 25-350 °C and 0.1-40 MPa: implications for formate distribution on earth.SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,345,9.
MLA Xi, Shichuan,et al."Quantitative in situ Raman analysis of formate salt solutions at 25-350 °C and 0.1-40 MPa: implications for formate distribution on earth".SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 345(2026):9.

入库方式： OAI收割

来源：海洋研究所

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