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Selenium oxyanions: Highly selective uptake by a novel anion exchanger

Published online by Cambridge University Press:  31 January 2011

Naofumi Kozai ,
Toshihiko Ohnuki  and
Sridhar Komarneni
Naofumi Kozai*
Affiliation:
Department of Environmental Sciences, Japan Atomic Energy Research Institute, Tokai, Ibaraki, 319-1195 Japan
Toshihiko Ohnuki
Affiliation:
Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki, 319-1195 Japan
Sridhar Komarneni
Affiliation:
Department of Crop and Soil Sciences and Materials Research Institute, 205 Material Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802
*
a)Address all correspondence to this author.kozai@nucef.tokai.jaeri.go.jp
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Abstract

We report the extremely high and selective uptake of selenium oxyanions by a novel anion exchanger, Ni1-xZn2x(OH)2(OCOCH3)2xnH2O (0.15<x<0.25). The tested Ni–Zn basic salt (x=0.24) exhibited very high selectivity for Se(IV) [Kd = 9.0 × 104 cm3/g with an initial Se(IV) concentration of 1 × 10-4 M] in the presence of 0.1 M C1− solution. The uptake of Se(IV) on the Ni–Zn basic salt was irreversible when treated with solutions containing 1 N C1− 1N NO3− or 1 N PO43−This novel exchanger also showed high Kd (2.6 × 103 cm3/g) for Se(VI), and therefore it is expected to be useful for decontamination and removal of selenium oxyanions from contaminated water.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 17 , Issue 12 , December 2002 , pp. 2993 - 2996
Copyright
Copyright © Materials Research Society 2002

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