Arsenic in marine sediments from French Mediterranean ports: Geochemical partitioning, bioavailability and ecotoxicology

Type Article
Date 2013-03
Language English
Author(s) Mamindy-Pajany Yannick1, Hurel Charlotte2, Geret Florence2, Galgani FrancoisORCID3, Battaglia-Brunet Fabienne4, Marmier Nicolas1, Romeo Michele1
Affiliation(s) 1 : Univ Nice Sophia Antipolis, Fac Sci, Lab Ecosyst Marins Cotiers & Reponses Stress ECOM, F-06108 Nice 02, France.
2 : Univ Ctr Jean Francois Champollion, Lab GEODE, F-81012 Albi, France.
3 : IFREMER Corse, Lab Environm Ressources PAC Corse Imm Agostini, F-20600 Zi Furiani, Bastia, France.
4 : BRGM Orleans, F-45060 Orleans 02, France.
Source Chemosphere (0045-6535) (Pergamon-elsevier Science Ltd), 2013-03 , Vol. 90 , N. 11 , P. 2730-2736
DOI 10.1016/j.chemosphere.2012.11.056
WOS© Times Cited 39
Keyword(s) Arsenic speciation, Chemical sequential extraction, Embryo-toxicity test, Marine sediment, Microtox toxicity test, Pollutant bioavailability
Abstract This work investigates arsenic mobility, bioavailability and toxicity in marine port sediments using chemical sequential extraction and laboratory toxicity tests. Sediment samples were collected from two different Mediterranean ports, one highly polluted with arsenic and other inorganic and organic pollutants (Estaque port (EST)), and the other one, less polluted, with a low arsenic content (Saint Mandrier port (SM)). Arsenic distribution in the solid phase was studied using a sequential extraction procedure specifically developed for appraising arsenic mobility in sediments. Toxicity assessment was performed on sediment elutriates, solid phases and aqueous arsenic species as single substance using the embryotoxicity test on oyster larvae (Crassostrea gigas) and the Microtox test with Vibrio fischeri. Toxicity results showed that all sediment samples presented acute and sub-chronic toxic effects on oyster larvae and bacteria, respectively. The Microtox solid phase test allow to discriminate As-contaminated samples from the less contaminated ones, suggesting that toxicity of whole sediment samples is related to arsenic content. Toxicity of dissolved arsenic species as single substance showed that Vibrio fischeri and oyster larvae are most sensitive to As(V) than As(III). The distribution coefficient (Kd) of arsenic in sediment samples was estimated using results obtained in chemical sequential extractions. The Kd value is greater in SM (450 L kg(-1)) than in EST (55 L kg(-1)), indicating that arsenic availability is higher for the most toxic sediment sample (Estaque port). This study demonstrates that arsenic speciation play an important role on arsenic mobility and its bioavailability in marine port sediments. (c) 2012 Elsevier Ltd. All rights reserved.
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