Evaluation of laboratory and industrial meat and bone meal combustion residue as cadmium immobilizing material for remediation of polluted aqueous solutions: Chemical and ecotoxicological studies

JOURNAL OF HAZARDOUS MATERIALS

卷:166

Article

Coutand, M.¹  Deydier, E.²  Cyr, M.¹  Mouchet, F.³  Gauthier, L.³  Guilet, R.⁴  Savaete, L. Bernues^1,2,3,4  Cren, S.³  Clastres, R.¹ 

[1] Univ Toulouse, UPS, INSA, LMDC, F-31077 Toulouse 04, France

[2] Univ Toulouse 3, Chim Coordinat Lab, CNRS, IUT A,UPR 8241, F-81104 Castres, France

[3] Univ Toulouse, UPS, CNRS, Lab Ecol Fonct,Ecolab,INPT,UMR 5245, F-31326 Auzeville Tolosane, France

[4] Univ Toulouse, UPS, LGC, UMR 5503, F-31106 Toulouse, France

关键词: Meat and bone meal;    Incineration;    Cadmium;    Toxicity;    Xenopus larvae;   

DOI  :  10.1016/j.jhazmat.2008.11.104

来源: Elsevier

【 摘 要 】

Meat and Bone Meals (MBM) combustion residues (ashes) are calcium and phosphate-rich materials. The aim of this work is to evaluate ashes efficiency for remediation of cadmium-contaminated aqueous solutions, and to assess the bioavailability of cadmium on Xenopus laevis larvae. In this study both industrial (MBM-BA) and laboratory (MBM-LA) ashes are compared regarding their efficiency. Kinetic investigations reveal that cadmium ions are quickly immobilized, with a maximum cadmium uptake at 57 mg Cd2+/g of ashes for MBM-LA, two times higher than metal uptake quantity of MBM-BA, in our experimental conditions. Chemical and X-ray diffraction analysis (XRD) reveal that Cd2+ is mainly immobilized as Ca10-xCdx(PO4)(6)(OH)(2) by both ashes, whereas otavite, Cd(CO3), is also involved for MBM-LA in cadmium uptake. Otavite formation could be explained by the presence of carbonates in MBM-LA, as observed by W. Genotoxicity of cadmium solution on Xenopus larvae is observed at 0.02, 0.2 and 2 mg Cd2+/L However addition of only 0.1 g/L MBM-LA inhibits these effects for the above concentration values whereas Cd2+ bioaccumulation in larvae's liver is similar for both experiments, with and without ashes. (C) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

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