A facile approach of adsorption of acid blue 9 on aluminium silicate-coated fuller's earth - equilibrium and kinetics studies

Kumar, R Naresh and Martha, Surendra Kumar and Maria, C and et al, . (2020) A facile approach of adsorption of acid blue 9 on aluminium silicate-coated fuller's earth - equilibrium and kinetics studies. Surfaces and Interfaces. ISSN 2468-0230 (In Press)

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Abstract

Fuller's Earth (FE) and Aluminum Silicate Coated Fuller's Earth (ASFE) are used to removing Acid Blue 9 (AB9) dye from aqueous solutions as adsorbents. The adsorption capacities of FE and ASFE are ∼36.70 mg/g and ∼174.22 mg/g, respectively. The adsorbent dose requested for the maximum removal of AB9 dye is 1.0 g in the case of FE, whereas it is only 0.15 g in the case of ASFE. The contact time to establish equilibrium found to be 120 min in both the dye removal. Langmuir, Freundlich and Dubinin - Radushkevich adsorption isotherms are being used to explore the adsorption mechanism. Langmuir adsorption isotherm best explained the uptake of AB9 dye by FE and ASFE, respectively. The kinetics of these adsorption processes are of pseudo-second order reactions.

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