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Investigation of Two Novel Approaches for Detection of Sulfate Ion and Methane Dissolved in Sediment Pore Water Using Raman Spectroscopy
Du, Zengfeng1; Chen, Jing1; Ye, Wangquan1; Guo, Jinjia1; Zhang, Xin2; Zheng, Ronger1
2015-06-01
Source PublicationSENSORS
Volume15Issue:6Pages:12377-12388
SubtypeArticle
AbstractThe levels of dissolved sulfate and methane are crucial indicators in the geochemical analysis of pore water. Compositional analysis of pore water samples obtained from sea trials was conducted using Raman spectroscopy. It was found that the concentration of SO42- in pore water samples decreases as the depth increases, while the expected Raman signal of methane has not been observed. A possible reason for this is that the methane escaped after sampling and the remaining concentration of methane is too low to be detected. To find more effective ways to analyze the composition of pore water, two novel approaches are proposed. One is based on Liquid Core Optical Fiber (LCOF) for detection of SO42-. The other one is an enrichment process for the detection of CH4. With the aid of LCOF, the Raman signal of SO42- is found to be enhanced over 10 times compared to that obtained by a conventional Raman setup. The enrichment process is also found to be effective in the investigation to the prepared sample of methane dissolved in water. By CCl4 extraction, methane at a concentration below 1.14 mmol/L has been detected by conventional Raman spectroscopy. All the obtained results suggest that the approach proposed in this paper has great potential to be developed as a sensor for SO42- and CH4 detection in pore water.
KeywordRaman Spectroscopy Sulfate Ion Methane Lcof Ccl4 Extraction
DOI10.3390/s150612377
Indexed BySCI
Language英语
WOS IDWOS:000357869200014
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Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/49203
Collection海洋地质与环境重点实验室
Affiliation1.Ocean Univ China, Opt & Optoelect Lab, Qingdao 266100, Peoples R China
2.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China
Recommended Citation
GB/T 7714
Du, Zengfeng,Chen, Jing,Ye, Wangquan,et al. Investigation of Two Novel Approaches for Detection of Sulfate Ion and Methane Dissolved in Sediment Pore Water Using Raman Spectroscopy[J]. SENSORS,2015,15(6):12377-12388.
APA Du, Zengfeng,Chen, Jing,Ye, Wangquan,Guo, Jinjia,Zhang, Xin,&Zheng, Ronger.(2015).Investigation of Two Novel Approaches for Detection of Sulfate Ion and Methane Dissolved in Sediment Pore Water Using Raman Spectroscopy.SENSORS,15(6),12377-12388.
MLA Du, Zengfeng,et al."Investigation of Two Novel Approaches for Detection of Sulfate Ion and Methane Dissolved in Sediment Pore Water Using Raman Spectroscopy".SENSORS 15.6(2015):12377-12388.
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