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THE EFFECT OF SOIL PROPERTIES ON ADSORPTION AND DESORPTION OF ZINC BY ALKALINE SOILS

Bijay Sıngh, Gurcharan Singh Sekhon

Open publisher page 19 citations

Abstract

The adsorption of Zn by seven alkaline soils of Punjab, India followed the Langmuir equation. At high applied concentrations, however, Zn was probably precipitated as hydroxide. Sequential desorption of adsorbed Zn with IM KC1 and 0.05M Cu(CH3COO)2 provided a measure of its exchangeable and chelated forms. Adsorption-desorption parameters have been computed by analyzing the data according to Langmuir equations. The influence of soil properties on the adsorption-desorption of Zn has been illustrated by correlating them with Langmuir coefficients. Significant zero order correlation coefficients exist between Sm, Rm1, or Rm2 and clay, organic carbon, CaCO3, or CEC. The retaining powers of clay and organic matter are predominantly due to their CEC. Although clay functions independently, CaCO3 and organic matter interact with one another for adsorption of Zn.

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The adsorption of Zn by seven alkaline soils of Punjab, India followed the Langmuir equation. At high applied concentrations, however, Zn was probably precipitated as hydroxide. Sequential desorption of adsorbed Zn with IM KC1 and 0.05M Cu(CH3COO)2 provided a measure of its exchangeable and chelated forms. Adsorption-desorption parameters have been computed by analyzing the data according to Langmuir equations. The influence of soil properties on the adsorption-desorption of Zn has been illustrated by correlating them with Langmuir coefficients. Significant zero order correlation coefficients exist between Sm, Rm1, or Rm2 and clay, organic carbon, CaCO3, or CEC. The retaining powers of clay and organic matter are predominantly due to their CEC. Although clay functions independently, CaCO3 and organic matter interact with one another for adsorption of Zn.

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Available abstract

The adsorption of Zn by seven alkaline soils of Punjab, India followed the Langmuir equation. At high applied concentrations, however, Zn was probably precipitated as hydroxide. Sequential desorption of adsorbed Zn with IM KC1 and 0.05M Cu(CH3COO)2 provided a measure of its exchangeable and chelated forms. Adsorption-desorption parameters have been computed by analyzing the data according to Langmuir equations. The influence of soil properties on the adsorption-desorption of Zn has been illustrated by correlating them with Langmuir coefficients. Significant zero order correlation coefficients exist between Sm, Rm1, or Rm2 and clay, organic carbon, CaCO3, or CEC. The retaining powers of clay and organic matter are predominantly due to their CEC. Although clay functions independently, CaCO3 and organic matter interact with one another for adsorption of Zn.

Key concepts: Adsorption, Desorption, Chemistry, Langmuir, Soil water, Organic matter, Alkali soil, Zinc

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