Simulation of the potential effects of CO2 leakage from carbon capture and storage activities on the mobilization and speciation of metals

Simulation of the potential effects of CO2 leakage from carbon capture and storage activities on the mobilization and speciation of metals

Author Romano de Orte, Manoela Google Scholar
Sarmiento, Aguasanta M. Google Scholar
Angel DelValls, T. Google Scholar
Riba, Inmaculada Google Scholar
Institution Univ Cadiz
Univ Huelva
Universidade Federal de São Paulo (UNIFESP)
Abstract One of the main risks associated with carbon capture and storage (CCS) activities is the leakage of the stored CO2, which can result in several effects on the ecosystem. Laboratory-scale experiments were performed to provide data on the possible effects of CO2 leakage from CCS on the mobility of metals previously trapped in sediments. Metal-contaminated sediments were collected and submitted to acidification by means of CO2 injection using different pH treatments. the test lasted 10 days, and samples were collected at the beginning and at the end of the experiment for metal analysis. the results revealed increases in the mobility of metals such as Co, Cu, Fe, Pb and Zn due to pH decreases. Geochemical modeling demonstrated that acidification influenced the speciation of the metals, increasing the concentrations of their free forms. These data suggest the possible sediment contamination consequences of accidental CO2 leakage during CCS activities. (C) 2014 Elsevier B.V. All rights reserved.
Keywords Carbon capture and storage (CCS)
Metal mobility
Speciation
Contamination
Acidification
Risk
Language English
Sponsor Spanish Ministry of Science and Innovation
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Grant number Spanish Ministry of Science and Innovation: CTM2011-28437-C02-02/TECNO
Spanish Ministry of Science and Innovation: CTM2012-36476-C02-01/TECNO
CAPES: BEX-0-501/09-3
Date 2014-09-15
Published in Marine Pollution Bulletin. Oxford: Pergamon-Elsevier B.V., v. 86, n. 1-2, p. 59-67, 2014.
ISSN 0025-326X (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 59-67
Origin http://dx.doi.org/10.1016/j.marpolbul.2014.07.042
Access rights Closed access
Type Article
Web of Science ID WOS:000342860100019
URI http://repositorio.unifesp.br/handle/11600/38222

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