Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 161, Issue 2-3, Pages 753-759Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2008.04.019
Keywords
Spent tea leaves; Adsorption; Isotherm; Methylene blue; Kinetics
Categories
Funding
- Universiti Sains Malaysia under the Research University (RU) Scheme [1001/PJKIMIA/814005]
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In the present study, spent tea leaves (STL) were used as a new non-conventional and low-cost adsorbent for the cationic dye (methylene blue) adsorption in a batch process at 30 degrees C. Equilibrium sorption isotherms and kinetics were investigated. The experimental data were analyzed by the Langmuir, Freundlich and Temkin models of adsorption. The adsorption isotherm data were fitted well to the Langmuir isotherm and the monolayer adsorption capacity was found to be 300.052 mg/g at 30 degrees C. The kinetic data obtained at different initial concentrations were analyzed using pseud-first-order, pseudo-second-order and intraparticle diffusion equations. The results revealed that the spent tea leaves, being waste, have the potential to be used as a low-cost adsorbent for the removal of methylene blue from aqueous Solutions. (C) 2008 Elsevier B.V. All rights reserved.
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