Figure 1.

The geochemical response of carbon dioxide gas in a model sandstone aquifer is shown by difference between High Plains aquifer (symbols, [20,21]) and simulated groundwater chemistry (solid line) as depth versus pH (a), log [HCO3-] (b), log pCO2 (c), log ΣCaq (d), fraction calcite dissolved (e) and dissolved carbon speciation (f).

Carroll et al. Geochemical Transactions 2009 10:4   doi:10.1186/1467-4866-10-4
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