Remediation of Heavy Metal Cd, Cr, Cu, Co, and Ni Ions from Kaolinite Clay Using Molecular Micelles Chelators and D-Optimum Experimental DesignReportar como inadecuado




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This study investigated the potentialutility of poly sodium N-undecanoyl-L-leucyl-valinate poly-L-SULV, poly sodium N-undecanoyl-L-leucyl-alanate poly-L-SULA, and poly sodium N-undecanoyl-glycinatepoly-SUG molecular micelles MMs as chelators for heavy metal Cd,Cr, Cu, Co, and Ni ion remediation of kaolinite clay using D-optimumexperimental design. D-optimum experimental design was employed tosimultaneously investigate the influence of design variables such as the bufferpH, chelator concentration, and centrifuge speed to evaluate the optimumconditions and to reduce the time and cost of metal ion remediation. Thepartition coefficients of the metal ion concentrations between the kaoliniteclay and chelator equilibrium were also evaluated. In addition, the influenceof metal ion concentrations on the remediation capability of the chelators wasevaluated by conducting remediation studies at four different 10 ppm, 40 ppm,60 ppm, and 80 ppm metal ion concentrations. In general, the results of theremediation efficiency and partition coefficients obtained in this study arehighly metal ion dependent and also dependent upon the chelator used for theremediation. Specifically, the remediation efficiency of the molecular micelleswas found to be comparable to or better than the corresponding remediation efficiency obtained when SDSor EDTA was used for the remediation. However, at optimum conditions, poly-SULVand poly-L-SULA molecular micelle chelators demonstrated superior remediationefficiencies for Cr, with remediation efficiency of 99.9 ± 8.7% and 99.1 ± 0.7%,respectively.

KEYWORDS

Heavy Metal Ion Remediation; Molecular Micelles Chelator; D-Optimum Experimental Design; Kaolinite Clay

Cite this paper

S. Fakayode, A. Taylor, M. McCoy, S. Owen, W. Stapleton, C. Grady and D. Pollard -Remediation of Heavy Metal Cd, Cr, Cu, Co, and Ni Ions from Kaolinite Clay Using Molecular Micelles Chelators and D-Optimum Experimental Design,- Journal of Environmental Protection, Vol. 4 No. 8, 2013, pp. 789-795. doi: 10.4236-jep.2013.48092.





Autor: Sayo O. Fakayode, Ashley M. Taylor, Maya McCoy, Sri Lanka Owen, Whitney E. Stapleton, Carmen Grady, David A. Pollard

Fuente: http://www.scirp.org/



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