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DOI | 10.1038/NGEO2919 |
Mobility and persistence of methane in groundwater in a controlled-release field experiment | |
Cahill, Aaron G.1,2; Steelman, Colby M.1; Forde, Olenka2; Kuloyo, Olukayode3; Ruff, S. Emil3; Mayer, Bernhard3; Mayer, K. Ulrich2; Strous, Marc3; Ryan, M. Cathryn3; Cherry, John A.1; Parker, Beth L.1 | |
2017-04-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Expansion of shale gas extraction has fuelled global concern about the potential impact of fugitive methane on groundwater and climate. Although methane leakage from wells is well documented, the consequences on groundwater remain sparsely studied and are thought by some to be minor. Here we present the results of a 72-day methane gas injection experiment into a shallow, flat-lying sand aquifer. In our experiment, although a significant fraction of methane vented to the atmosphere, an equal portion remained in the groundwater. We find that methane migration in the aquifer was governed by subtle grain-scale bedding that impeded buoyant free-phase gas flow and led to episodic releases of free-phase gas. The result was lateral migration of gas beyond that expected by groundwater advection alone. Methane persisted in the groundwater zone despite active growth of methanotrophic bacteria, although much of the methane that vented into the vadose zone was oxidized. Our findings demonstrate that even small-volume releases of methane gas can cause extensive and persistent free phase and solute plumes emanating from leaks that are detectable only by contaminant hydrogeology monitoring at high resolution. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398162800017 |
WOS关键词 | DRINKING-WATER WELLS ; AIR-DISTRIBUTION ; GAS-WELLS ; CONTAMINATION ; EMISSIONS ; MIGRATION ; MARCELLUS ; AQUIFER ; QUALITY ; LEAKAGE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/34694 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Guelph, Inst Groundwater Res G360, Guelph, ON N1G 2W1, Canada; 2.Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Vancouver, BC V6T 1Z4, Canada; 3.Univ Calgary, Dept Geosci, Calgary, AB T2N 1N4, Canada |
推荐引用方式 GB/T 7714 | Cahill, Aaron G.,Steelman, Colby M.,Forde, Olenka,et al. Mobility and persistence of methane in groundwater in a controlled-release field experiment[J]. NATURE GEOSCIENCE,2017,10(4). |
APA | Cahill, Aaron G..,Steelman, Colby M..,Forde, Olenka.,Kuloyo, Olukayode.,Ruff, S. Emil.,...&Parker, Beth L..(2017).Mobility and persistence of methane in groundwater in a controlled-release field experiment.NATURE GEOSCIENCE,10(4). |
MLA | Cahill, Aaron G.,et al."Mobility and persistence of methane in groundwater in a controlled-release field experiment".NATURE GEOSCIENCE 10.4(2017). |
条目包含的文件 | 条目无相关文件。 |
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