Changes in the Chemistry of Groundwater Reacted with CO2: Comparison of Laboratory Results with the ZERT Field Pilot
| Autor: | Yousif K. Kharaka, B. Thomas, James J. Thordsen, Atosa A. Abedini, Sarah R. Beers |
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| Rok vydání: | 2017 |
| Předmět: |
Calcite
geography geography.geographical_feature_category Ion exchange Dolomite Alkalinity Earth and Planetary Sciences(all) General Medicine 010501 environmental sciences 010502 geochemistry & geophysics 01 natural sciences chemistry.chemical_compound chemistry Desorption Environmental chemistry Dissolution Groundwater 0105 earth and related environmental sciences Water well |
| Zdroj: | Procedia Earth and Planetary Science. 17:241-244 |
| ISSN: | 1878-5220 |
| DOI: | 10.1016/j.proeps.2016.12.043 |
| Popis: | As part of the ZERT program, sediments from two wells at the ZERT site, located in Bozeman, Montana, USA were reacted with a solution having the composition of local groundwater. A total of 50 water samples were collected from 7 containers placed for 15 days in a glove box with one atmosphere of CO 2 to investigate detailed changes in the concentrations of major, minor and trace inorganic compounds, and to compare these with changes observed in groundwater at the ZERT site following CO 2 injection. Laboratory results included rapid changes in pH (8.6 to 5.7), alkalinity (243 to 1295 mg/L as HCO 3 ), electrical conductance (539 to 1822 μS/cm), Ca (28 to 297 mg/L), Mg (18 to 63 mg/L), Fe (5 to 43 μg/L) and Mn (2 to 837 μg/L) following CO 2 injection. These chemical changes, which are in general agreement with those obtained from sampling the ZERT monitoring wells, could provide early detection of CO 2 leakage into shallow groundwater. Dissolution of calcite, some dolomite and minor Mn-oxides, and desorption/ion exchange are likely the main geochemical processes responsible for the observed changes. |
| Databáze: | OpenAIRE |
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