A laboratory study of the initial effects of dissolved carbon dioxide (CO2) on metal release from shallow sediments

On the mobilization of metals by CO2 leakage into shallow aquifers: exploring release mechanisms by modeling field and laboratory experiments

“…They observed an increase in concentrations of Ca, Si, Na, Al, B, Co, K, Li, Mg, Mn, Ni, Pb, Sr, Zn, a decline in Fe and Be concentrations, and no changes for Cl and SO 4 after initial CO 2 influx. Varadharajan et al . conducted a series of sequential leaching tests with sediments from a shallow groundwater formation in Mississippi, USA.…”

“…Together, these experiments analyzed various types of sediments (e.g. essentially carbonate‐free in Varadharajan et al vs. carbonate‐dominated in Wunsch et al …”

“…in a variety of conditions in terms of redox state (e.g. reducing in Varadharajan et al . vs. oxidizing in Little and Jackson), pressure conditions (e.g.…”

“…vs. oxidizing in Little and Jackson), pressure conditions (e.g. 4 bars in Varadharajan et al . vs. atmospheric pressure in most batch experiments, e.g.…”

“…Humez et al tens of days, to hundreds of days. Although this wide range of experimental conditions with various sediment types resulted in different dissolved metal concentration responses, one common observation found in these experiments was the rapid increase in alkali and alkaline earth metals, including Na, K, Ca, Mg, Sr, and Ba.…”