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Tina Basu,Uday Chand Ghosh 한국공업화학회 2011 Journal of Industrial and Engineering Chemistry Vol.17 No.6
Performances of As(III) adsorption by agglomerated nanoparticles of calcined (250℃) hydrous Fe(III)–Al(III) mixed oxide (NHIAO-250℃) were investigated at 30 8C and pH 7.0 in the absence/presence of background ions occurring in groundwater. Kinetics and equilibrium data described, respectively, the pseudo-second order and the Langmuir isotherm equations well. Higher (15–35%) monolayer capacity (58.30 ± 3.15 mg g^(-1)) of As(III) system in absence of any background ions implied the adverse influence of the incorporated ions over As(III) sorption. Increased entropy (positive ΔS) was responsible for the endothermic reactions (positive ΔH) and spontaneous nature (ΔG = negative). Thomas model described the fixed-bed breakthrough curves of As(III) removal from spiked groundwater well.