Abstract
Adsorption of Zn(II) and Cd(II) ions on soil TLC plates was studied using aqueous solutions of surfactants as mobile phases. The effects of decomposition of soil organic matter, cation saturation, soil pH, and sewage sludge on the hR F values (or adsorption) of Zn(II) and Cd(II) were investigated. Among these conditions, soil pH was the most important factor affecting adsorption of Zn(II) and Cd(II) ions by soil layers. Aqueous solutions of cationic (cetyltrimethylammonium bromide, CTAB), nonionic ( t -octylphenoxydecaethoxyethanol, Triton X-100), and anionic (sodium dodecyl sulfate, SDS) surfactants at different concentrations (below, near, and above their critical micelle concentrations, CMC) were tested as mobile phases to examine their effect on the efficiency of adsorption of zinc(II) and cadmium(II) by soil stationary phases. Furthermore, the combined effect of surfactants and fertilizers on the adsorption characteristics of Cd(II) and Zn(II) was also investigated. Fertilizers such as KCl and CaCl 2...
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