Metal fractionation in marine sediments acidified by enrichment of CO2: A risk assessment

Orte, Manoela Romanó de; Bonnail, Estefanía; Sarmiento, Aguasanta Miguel; Bautista-Chamizo, Esther; Basallote, M. Dolores; Riba, Inmaculada; DelValls, Ángel; Nieto, José Miguel

doi:10.1016/j.marpolbul.2018.04.072

Cited by 17 publications

(4 citation statements)

References 36 publications

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“…Many studies have been performed in the last few years in order to analyze the potential effects from CO 2 enrichment in the ocean caused by both increases in CO 2 atmosphere concentrations and natural uptake on seawater surface, and by CO 2 leakages during the CCS process (e.g., [7][8][9][10]), as well as in combination with harmful substances [11,12].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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 Piaçaguera 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.

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Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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“…These findings indicated that acidification could increase the mobility of metals from the sediment samples to the water column, which might cause toxic effects on marine organisms. Previous studies reported the pH as a variable that mostly might influence the availability of elements from sediments [17]. Furthermore, it can be suggested that the significant difference found in the toxicity indexes at pH 7.0, using the RSP sediment, could also be related to the increase in metal mobility.…”

Section: Tabular Matrixmentioning

confidence: 94%

“…Two sediment samples were collected from the Bay of Cádiz (Figure 1). The selected areas were previously studied and were classified according to the metal contamination levels [5,16,17]. The Rio San Pedro (36 • 31 52.90" N; 6 • 12 48.43" W) sampling site is classified as low metal concentration (control site), while the Trocadero (36 • 31 15.5" N; 6 • 12 25.1" W) is considered a sampling site with a moderate metal concentration (contaminated site) [16,18].…”

Section: Study Areamentioning

confidence: 99%

Risk Assessment of a Coastal Ecosystem from SW Spain Exposed to CO2 Enrichment Conditions

et al. 2023

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The Weight-of-Evidence (WOE) approach uses multiple lines of evidence to analyze the adverse effects associated with CO2 enrichment in two stations from the Gulf of Cádiz (Spain) with different contamination degrees. Sediment contamination and metal (loid) mobility, toxicity, ecological integrity, and bioaccumulation from the samples exposed to different acidification scenarios (pH gradient from 8.0 to 6.0) were used in the WOE. The experiments were conducted under laboratory conditions using a CO2-bubbling system. Different integration approaches such as multivariate analyses were used to evaluate the results. The results indicated that the adverse biological effects under pH 6.5 were related to the mobility of dissolved elements (As, Fe, Cu, Ni, and Zn). Furthermore, the pH reduction was correlated to the increase of bioaccumulation of As, Cr, Cu, Fe, and Ni in the tissues of mussels at pH 7.0. The noncontaminated sediment showed environmental degradation related to the acidification at pH values of 7.0; whereas the sediment moderately contaminated showed both environmental risks, caused by acidification and the presence and the increase of the bioavailability of contaminants. The WOE approach supposes an effective tool to identify and distinguish the causes of adverse effects related to the enrichment of CO2 in marine environments.

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“…Potential effects of CO2 leakages on the benthic ecosystem have mainly been studied at 1 atm, both biological effects (e.g. Bautista-Chamizo et al, 2016;Borrero-Santiago et al, 2016Basallote et al, 2018;Świeżak et al, 2018;Sokołowski et al, 2018;Conradi et al, 2019) and changes in seawater chemistry (Payán et al, 2012;Lichtschlag et al, 2015;De Orte et al, 2018). Several studies have mimicked realistic conditions addressing pressure as a variable (Ardelan et al, 2012;Molari et al, 2018Molari et al, , 2019Basallote et al, 2020), but further studies are needed to evaluate the effects of the compressibility of CO2 (Vilarrasa et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Climate change mitigation effects: How do potential CO2 leaks from a sub-seabed storage site in the Norwegian Sea affect Astarte sp. bivalves?

et al. 2021

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Metal fractionation in marine sediments acidified by enrichment of CO2: A risk assessment

Cited by 17 publications

References 36 publications

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

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

Risk Assessment of a Coastal Ecosystem from SW Spain Exposed to CO2 Enrichment Conditions

Climate change mitigation effects: How do potential CO2 leaks from a sub-seabed storage site in the Norwegian Sea affect Astarte sp. bivalves?

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