An Experimental Study of the Effects of Potential CO2 Seepage in Sediments

Abstract It is imperative to understand the potential effects of CO 2 seepage on the local environment. Accordingly, a flow through column system was designed and carried out to understand the potential impacts caused by CO 2 seepage, focusing on soil geochemistry changes. The main results of the laboratory experiments indicate that increased levels of CO 2 generate a quick drop in pH for both limestone sand and silica sand, and slightly increased ions concentration in solution phase. Once the seepage is stopped, a partial recovery for limestone sand towards the initial values of pH is recorded.