Potential influence of CO2 release from a carbon capture storage site on release of trace metals from marine sediment

M Cruz Payán; Bram Verbinnen; Berta Galan; Alberto Coz; Carlo Vandecasteele; Javier R Viguri

doi:10.1016/j.envpol.2011.10.015

Potential influence of CO2 release from a carbon capture storage site on release of trace metals from marine sediment

Environ Pollut. 2012 Mar:162:29-39. doi: 10.1016/j.envpol.2011.10.015. Epub 2011 Nov 10.

Authors

M Cruz Payán¹, Bram Verbinnen, Berta Galan, Alberto Coz, Carlo Vandecasteele, Javier R Viguri

Affiliation

¹ Department of Chemical Engineering and Inorganic Chemistry, ETSIIT, University of Cantabria, Santander, Spain.

PMID: 22243844
DOI: 10.1016/j.envpol.2011.10.015

Abstract

One of the main risks of CCS (Carbon Capture and Storage) is CO(2) leakage from a storage site. The influence of CO(2) leakage on trace metals leaching from contaminated marine sediment in a potential storage area (Northern Spain) is addressed using standardized leaching tests. The influence of the pH of the leaching solution on the leachates is evaluated using deionized water, natural seawater and acidified seawater at pH = 5, 6 and 7, obtained by CO(2) bubbling. Equilibrium leaching tests (EN 12457) were performed at different liquid-solid ratios and the results of ANC/BNC leaching test (CEN/TS 15364) were modeled using Visual Minteq. Equilibrium tests gave values of the final pH for all seawater leachates between 7 and 8 due to the high acid neutralization capacity of the sediment. Combining leaching test results and geochemical modeling provided insight in the mechanisms and prediction of trace metals leaching in acidified seawater environment.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Carbon Dioxide / analysis*
Geologic Sediments / analysis*
Metals / analysis*
Seawater / analysis*
Water Pollutants, Chemical / analysis*

Substances

Metals
Water Pollutants, Chemical
Carbon Dioxide