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Ecotoxic evaluation of mortar leachate using the amphibian larvae (Xenopus laevis)

Coutand, Marie and Mouchet, Florence and Cyr, Martin and Gauthier, Laury and Clastres, Pierre Ecotoxic evaluation of mortar leachate using the amphibian larvae (Xenopus laevis). (2010) Déchets Sciences et Techniques (57). ISSN 1271-0318

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Nowadays, many projects aim to reuse by-products (e.g. sewage sludge ash, sediments of dredging, MSWI…) in cement-based materials. However, some questions remain concerning the environmental impacts of these wastes in this kind of application. The cement-based materials in buildings or roads are subjected to leaching/draining by rainwater or subterranean water. Consequently, draining waters may constitute an important reservoir for contaminants, such as water extractible elements, in the aquatic environment. So these elements, which are potentially pollutant, could be in contact with living organisms of the ecosystems. The regulations in the field of waste materials are mainly based on the chemical composition of the waste, or on the quantity of leached elements and use standard tests. However the quantity of elements that are potentially leachable does not necessarily reflect the ecotoxic behaviour of the waste in the environment. The impact of a leachate depends on many factors such as: the intrinsic toxicity of the elements, speciation of metals, the nature of the medium, and physical and chemical interactions leading to the modification of the bioavailability of the pollutants. In order to assess the ecotoxic potential of by-products used in cement-based materials, measurements were made to evaluate the effects of acute toxicity and the possible effects of toxicity on the genome (genotoxicity) of larvae of amphibians exposed to various concentrations of mortar leachates. This work is related to the evaluation of the environmental impact of meat and bone meal ashes in the cement matrix using the standardized ISO 21427 amphibian micronucleus assay on Xenopus laevis larvae (ISO, 2006).

Item Type:Article
Additional Information:Le sommaire de la revue Déchets Sciences et Techniques n° 57 indique que ce numéro spécial rassemble "une sélection d’articles en anglais présentés par des auteurs francophones" dans le cadre du congrès WASCON de juin 2009 à Lyon, "congrès international de référence concernant la problématique de l’intégration des matières premières secondaires dans le domaine du génie civil"
Audience (journal):National peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
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Deposited On:14 Dec 2012 13:41

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