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The adsorption of hexametaphosphate ion, an important deflocculant used in the ceramic industry, from aqueous solutions onto kaolinite has been studied at different temperatures. The adsorption isotherm follows the Langmuir model: the thermodynamic parameters ΔGads0, ΔHads0, and ΔSads0 were calculated and found to be consistent with an interaction model involving the formation of an inner-sphere complex...
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