Adsorption of Chlorimuron-Ethyl on Two Typical Chinese Soils as Affected by Cd

Abstract:

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Coexistence of chlorimuron-ethyl and Cd is very common in Chinese soils. Adsorption of chlorimuron-ethyl and Cd on soils strongly affects their mobility. This study was conducted to investigate the effect of Cd on the adsorption of chlorimuron-ethyl on two typical Chinese soils, brown earth (BE) and black soil (BS). Batch equilibration methods were applied. The presence of Cd enhanced the adsorption of chlorimuron-ethyl on BE and BS, which resulted from the decrease of equilibrium solution pH caused by Cd2+ exchange with H+ ions of soil surface. Besides that, chlorimuron-ethyl adsorption possibly takes place on sites where Cd was previously adsorbed and the adsorbed Cd acted as a bridge between the soil and chlorimuron-ethyl. Such results suggested that Cd in field may decrease the mobility and bioavailability of chlorimuron-ethyl and correspondingly decrease its environmental risk.

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Periodical:

Edited by:

Zhenyu Du and Chengbin Li

Pages:

296-300

DOI:

10.4028/www.scientific.net/AMR.281.296

Citation:

X. R. Qu "Adsorption of Chlorimuron-Ethyl on Two Typical Chinese Soils as Affected by Cd", Advanced Materials Research, Vol. 281, pp. 296-300, 2011

Online since:

July 2011

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$35.00

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