Impacts of CO2 leakage into shallow formations on groundwater chemistry

doi:10.1016/j.fuproc.2014.11.042

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	Impacts of CO2 leakage into shallow formations on groundwater chemistry
	Zhu, Qianlin 1,2; Li, Xiaochun2 ; Jiang, Zhenbo 2,3; Wei, Ning 2
	2015
会议日期	MAY 13-15, 2014
会议地点	Austr China Joint Res Ctr Energy, Taiyuan, PEOPLES R CHINA
关键词	Geological storage CO2 leakage Shallow groundwater Groundwater contamination Groundwater chemistry
卷号	135
DOI	10.1016/j.fuproc.2014.11.042
页码	162-167
英文摘要	Geological storage of CO2 is one option for mitigating atmospheric emissions of carbon dioxide. However, the injected CO2 has the possibility of leakage. The leaked CO2 may move upward into shallow formations and thereby affects shallow groundwater. To investigate this effect, 27 tonnes of gaseous CO2 was injected into an aquifer about 180 m below a surface. Periodic groundwater samples were studied to identify shift of hydro-chemical parameters, including pH, TDS, ORP, Ca, Mg, Na, HCO3, Cl, SO4, Pb, Fe, and F. The results indicated that CO2 dissolution and reaction concurrently reduced aquifer pH levels and increased concentrations of TDS, Ca, Mg, HCO3, and F. ORP level and SO4 concentration remained static. Pb and Fe concentrations were lower than the detection limit 1 mg/L and 0.02 mg/L, respectively. After the CO2 breakthrough, Cl concentration increased to a stable level slightly higher than the background concentration. The shift in groundwater levels of Ca and Mg was attributed to dolomite (or Mg-rich calcite) and calcite-dominant dissolution processes. Results indicated linear approximations between concentrations of F vs. HCO3 (slope 0.0036) and F vs. Ca (slope 0.013). Additionally, the TDS and the total molar concentration of Ca and Mg showed linear correlations with increased levels of HCO3. (C) 2015 Elsevier B.V. All rights reserved.
会议录	FUEL PROCESSING TECHNOLOGY
会议录出版者	ELSEVIER SCIENCE BV
会议录出版地	AMSTERDAM
语种	英语
WOS研究方向	Chemistry ; Energy & Fuels ; Engineering
WOS记录号	WOS:000355371100023
内容类型	会议论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4861]
专题	岩土力学所知识全产出_会议论文
作者单位	1.China Univ Min & Technol, Inst Low Carbon Energy ; 2.Chinese Acad Sci, Inst Rock & Soil Mech ; 3.Kyushu Univ, Dept Civil Engn
推荐引用方式 GB/T 7714	Zhu, Qianlin,Li, Xiaochun,Jiang, Zhenbo,et al. Impacts of CO2 leakage into shallow formations on groundwater chemistry[C]. 见:. Austr China Joint Res Ctr Energy, Taiyuan, PEOPLES R CHINA. MAY 13-15, 2014.