title: Ex situ remediation of contaminated sediments using mineral additives: assessment of pollutant bioavailability with the Microtox solid phase test.
abstract: The aim of this work is to assess the potential ecotoxicological effects of contaminated sediments treated with mineral additives. The Microtox solid phase test was used to evaluate the effect of mineral additives on the toxicity of sediment suspensions. Four Mediterranean port sediments were studied after dredging and bioremediation: Sample A from navy harbor, sample B from commercial port and samples C and D from pleasure ports. Sediment samples were stabilized with three mineral additives: hematite, zero-valent iron and zeolite. Results show that all studied mineral additives can act as stabilizer agent in highly contaminated sediments (A and C) by decreasing dissolved metal concentrations and sediment toxicity level. On the contrary, for the less contaminated samples (B and D) hematite and zeolite can provoke toxic effect towards Vibrio fischeri since additive particles can favor bacteria retention and decrease bioluminescence emission.
authors.affiliation: University of Nice Sophia Antipolis, Laboratoire de Radiochimie, Sciences Analytiques et Environnement, Parc Valrose, 06108 Nice Cedex 02, France. yannickpajany@hotmail.com
authors.forename: Yannick
authors.initials: Y
authors.lastname: Mamindy-Pajany
authors.forename: Florence
authors.initials: F
authors.lastname: Geret
authors.forename: Michèle
authors.initials: M
authors.lastname: Roméo
authors.forename: Charlotte
authors.initials: C
authors.lastname: Hurel
authors.forename: Nicolas
authors.initials: N
authors.lastname: Marmier
mesh_terms: D048908:Aliivibrio fischeri / Q000187:drug effects; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005290:Ferric Compounds / Q000737:chemistry; D019015:Geologic Sediments / Q000737:chemistry*; D008903:Minerals / Q000737:chemistry*; D018675:Toxicity Tests / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000633:toxicity; D017641:Zeolites / Q000737:chemistry
chemical_list: D005290:Ferric Compounds; D008903:Minerals; D014874:Water Pollutants, Chemical; D017641:Zeolites; C000499:ferric oxide