Interlamellar adsorption of organic pollutants on hydrophobic vermiculite

摘要

The adsorption isotherms of nitrobenzene, 2-chlorophenol and 4-chlorophenol from water on hydrophobic vermiculite were studied. The excess isotherms were obtained by the immersion method. The basal spacings of the hydro-phobic vermiculite organocomplex-es in the adsorption equilibrium were determined by X-ray diffraction. By combining these two independent methods, the composition and the structure of the interlamel-lar space were evaluated. The free enthalpy of adsorption and the adsorption capacity were calculated by analyzing the adsorption isotherm on the basis of the Gibbs equation and by the Everett-Schay method.