NDLI: Kinetic , Equilibrium , and Thermodynamic Studies on the Adsorption of Cadmium ( II ) Ions using “ Aloji Kaolinite ” Mineral

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Kinetic , Equilibrium , and Thermodynamic Studies on the Adsorption of Cadmium ( II ) Ions using “ Aloji Kaolinite ” Mineral

Content Provider	Semantic Scholar
Author	Dawodu, Folasegun Anthony Akpomie, Kovo Godfrey
Copyright Year	2014
Abstract	The potential of Aloji kaolinte as a low-cost adsorbent for cadmium (II) ions from aqueous solution was investigated. The effect of pH, initial metal ion concentration, contact time, sorbent dose, and temperature on the adsorption process were determined using batch adsorption technique. Optimum adsorption was obtained at pH, 6.0 and equilibrium adsorption was achieved within 50 minutes. The chemical composition of the kaolinite was determined by classical method and revealed silica and alumina as the major constituents. Equilibrium adsorption isotherms such as Langmuir, BET, and Tempkin model were applied to the experimental data. The values of the linear regression coefficient (R 2 ) showed the best fit with the Tempkins isotherm (0.975), then the Langmuir isotherm (0.939) and the least the BET isotherm (0.812). The Elovich and intraparticle diffusion models were both applicable in the description of the kinetics of sorption. Thermodynamic analysis revealed negative values of ΔG 0 at all temperatures which indicated a spontaneous process. The entropy change obtained, (274.5J/mol/K) showed that the adsorption process is a highly disordered one. The positive value of ΔH 0 , (79.675KJ/mol) also indicated an endothermic adsorption process. The results of this study showed that Aloji kaolinite can be used as a low-cost adsorbent for cadmium (II) ions removal from aqueous industrial effluents. (
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.akamaiuniversity.us/PJST15_1_268.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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