Environmental Controls of Cadmium Desorption during CO2 Leakage

E. Frye, C. Bao, L. Li, and S. Blumsack

Environmental Science and Technology (2012)

DOI: 10.1021/es3005199

Geologic carbon sequestration represents a promising option for carbon mitigation. Injected CO2, however, can potentially leak into water systems, increase water acidity, and mobilize metals. This study used column experiments to quantify the effects of environmental controls on cadmium desorption during CO2 leakage in subsurface systems without ambient flow. Results show that fast leakage rates are responsible for earlier and larger amounts of Cd desorption. Long weathering time of Cd laden clay leads to low Cd desorption. Calcite content as low as 10

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