Integrative Assessment of Sediments Affected by CO2 Enrichment: A Case Study in the Bay of Santos-SP, Brazil

Autor(es)

Passarelli, Marina Cunha ^{[1, 2]} ; Bonnail, Estefania ^[3] ; Cesar, Augusto ^[4] ; DelValls, T. angel ^[5] ; Riba, Inmaculada ^[2]

Afiliação do(s) autor(es)

^[1] Petrobras SA, Dept Environm, BR-11010310 Santos, SP - Brazil

^[2] UNESCO UNITWIN WiCop, Fac Environm & Marine Sci, Dept Physicochem, Aquat Syst Res Grp, Cadiz 11510 - Spain

^[3] Univ Atacama, Ctr Invest Costeras Univ Atacama CIC UDA, Copiapo 1530000 - Chile

^[4] Fed Univ Sao Paulo UNIFESP, Dept Ocean Sci, BR-11030100 Santos, SP - Brazil

^[5] Santa Cecilia Univ UNISANTA, Dept Ecotoxicol, BR-11045907 Boqueirao - Brazil

• Tipo de documento: Artigo Científico
• Fonte: APPLIED SCIENCES-BASEL; v. 11, n. 24 DEC 2021.
• Citações Web of Science: 0

Resumo

CO2 enrichment in the marine environment caused by leakages from carbon capture and storage technologies may occur over operational procedures. An integrated approach using weight-of-evidence was applied to assess the environmental risk associated with the acidification caused by CO2 enrichment in coastal sediments from Santos (Brazil). Chemical analyses (metal(loid)s and organic contaminant (e.g., hydrocarbons), toxicity tests (amphipods mortality, sea-urchin embryo-larval development) and macro-benthic community structure alteration assessment were performed with different acidified scenarios (pH 8.0-6.0) for two stations with different contamination degrees. These lines of evidence were statistically analyzed and integrated (multivariate analysis and ANOVA). Results of toxicity showed significant chronic effects starting at pH 7.0 while acute effects were observed starting at pH 6.5. The macro-benthic community integrity showed significant differences for all treatments at the Piacaguera channel station, considered to be moderately contaminated. Results from the multivariate analysis correlated toxic effects and increase in the mobility of some elements with acidification. Also, the biological indexes were correlated with concentrations of dissolved Zn in seawater. The pH of 6.0 was extremely toxic for marine life due to its high acidification and metal bioavailability. The approach herein identified and discriminated the origin of the degradation caused by the acidification related to the enrichment of CO2. (AU)

• Processo FAPESP: 17/25936-0 - Avaliação da toxicidade de crack para mexilhões marinhos expostos a diferentes cenários de acidificação por mudanças climáticas: ToxCO2caine
• Beneficiário: Camilo Dias Seabra Pereira
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional