期刊
ADSORPTION SCIENCE & TECHNOLOGY
卷 21, 期 6, 页码 597-606出版社
SAGE PUBLICATIONS INC
DOI: 10.1260/026361703771953613
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The effect of chemical activation on the adsorption capacity of raw date pits towards the basic dye Methylene Blue (MB) was investigated. The raw material was impregnated with 30 wt% KOH solution followed by carbonization at 600degreesC for 2 h and activation with CO2 at 800degreesC for 1 h. The adsorption capacity increased from 80.3 mg/g to 123.1 mg/g upon chemical activation. Three simplified models including the pseudo-first-order, pseudo-second-order and intraparticle diffusion models were used to test the adsorption kinetics. The rates of adsorption were found to conform to pseudo-second-order kinetics with high correlation. The equilibrium results for MB adsorption on the activated carbon obtained from date pits were well fitted by the Langmuir isotherm equation.
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