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The effects of anion sorption on sorption and leaching of cadmium

Lookup NU author(s): Professor Keith Syers

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Abstract

The effect of chloride, sulfate, nitrate, and phosphate anions on the sorption and leaching of cadmium was examined in 2 soils (Manawatu silt loam and Egmont clay loam) which differ in their variable charge components. There was a larger sorption of cadmium in the presence of phosphate than in the presence of sulfate, nitrate, and chloride, and the difference was more pronounced in the Egmont soil. In soils, specific sorption of phosphate increases the negative charge. The increase in negative charge per unit amount of phosphate sorbed decreased with increasing phosphate sorption. The sorption of cadmium increased in response to phosphate sorption. The phosphate-induced cadmium sorption resulted from the increase in negative charge due to phosphate sorption. Column studies indicated that cadmium was less susceptible to leaching in the presence of phosphate than in the presence of nitrate.

Publication metadata

Author(s): Bolan NS, Naidu R, Khan MAR, Tillman RW, Syers JK

Publication type: Article

Publication status: Published

Journal: Australian Journal of Soil Research

Year: 1999

Volume: 37

Issue: 3

Pages: 445-460

Print publication date: 01/01/1999

ISSN (print): 0004-9573

ISSN (electronic): 1446-568X

Publisher: CSIRO Publishing

URL: http://dx.doi.org/10.1071/S97046

DOI: 10.1071/S97046

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