Study on adsorption of glyphosate (N-phosphonomethyl glycine) pesticide on MgAl-layered double hydroxides in aqueous solution

来自 dx.doi.org

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阅读量：

150

作者：

L Feng，Y Wang，Q Yang，DG Evans，C Forano，D Xue

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摘要：

MgAl-layered double hydroxides with different interlayer anions (nitrate, carbonate and chloride) were evaluated for their abilities to adsorb the organic pesticide glyphosate ( N-phosphonomethyl glycine, Gly). The adsorption isotherms of Gly on layered double hydroxides (LDHs) nitrate were described by the Langmuir equation at lower equilibrium concentration of Gly ( C e < 1.0 mmol/L), and the Gly adsorption capacity on LDHs increased with the layer charge density, i.e. the structural Al 3+/Mg 2+ ratio. Gly adsorption on LDHs nitrate generally occurred through two processes, external surface adsorption and interlayer anion exchange. The adsorption amount on LDHs at C e = 1.0 mmol/L decreased in the order of interlayer anions: Cl > NO 3 > CO 3 2.

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关键词：

Layered double hydroxides Glyphosate ( N-phosphonomethyl glycine Water treatment Pesticides Environmental

DOI：

10.1016/j.jhazmat.2005.04.037

被引量：

177

年份：

2005