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- W2793117599 abstract "Methane (CH4) is widely present in groundwater. Dissolved CH4 in groundwater is less understood when compared with that in wetlands. In this study, the concentrations and origin of dissolved CH4 in groundwater were investigated and the potential importance of groundwater CH4 emissions in arid and semi-arid regions of Inner Mongolia was discussed. Groundwater was extracted from domestic wells using a submersible pump or manual power and was analyzed for CH4 concentrations, δ13C-CH4, and physico-chemical variables. The results show that the concentrations of dissolved CH4 in groundwater had large spatial variability, ranging from 0 to 0.10 mg L−1 with a mean of 0.01 mg L−1 in Xilingol and from 0 to 8.99 mg L−1 with a mean of 1.44 mg L−1 in Xingan-Tongliao. Substantial CH4 concentrations of about 2.5–5.5 mg L−1 were found in central areas of Xingan-Tongliao in the winter and the summer. The δ13C-CH4 of about −85‰ was highly depleted while CH4 concentration was significantly negatively correlated with SO42− concentration, indicating that dissolved CH4 in groundwater was microbial in origin. This study suggests that groundwater as a source of CH4 might have great implications in arid and semi-arid regions worldwide and should deserve more research." @default.
- W2793117599 created "2018-03-29" @default.
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- W2793117599 date "2018-06-01" @default.
- W2793117599 modified "2023-10-14" @default.
- W2793117599 title "Dissolved methane in groundwater of domestic wells and its potential emissions in arid and semi-arid regions of Inner Mongolia, China" @default.
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- W2793117599 doi "https://doi.org/10.1016/j.scitotenv.2018.01.205" @default.
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