期刊
COLLOIDS AND SURFACES B-BIOINTERFACES
卷 105, 期 -, 页码 199-206出版社
ELSEVIER
DOI: 10.1016/j.colsurfb.2012.12.021
关键词
Adsorption; Kinetics; Thermodynamics; Equilibrium; Composite; Reusability
资金
- Universiti Sains Malaysia under the Research University (RU) Schemes [1001/PJKIMIA/814005, 1001/PJKIMIA/8045026]
A renewable waste tea activated carbon (WTAC) was coalesced with chitosan to form composite adsorbent used for waste water treatment. Adsorptive capacities of crosslinked chitosan beads (CCB) and its composite (WTAC-CCB) for Methylene blue dye (MB) and Acid blue 29 (AB29) were evaluated through batch and fixed-bed studies. Langmuir, Freundlich and Temkin adsorption isotherms were tested for the adsorption process and the experimental data were best fitted by Langmuir model and least by Freundlich model; the suitability of fitness was adjudged by the Chi-square (chi(2)) and Marquadt's percent standard deviation error functions. judging by the values of chi(2), pseudo-second-order reaction model best described the adsorption process than pseudo-first-order kinetic model for MB/AB29 on both adsorbents. After five cycles of adsorbents desorption test, more than 50% WTAC-CCB adsorption efficiency was retained while CCB had <20% adsorption efficiency. The results of this study revealed that WTAC-CCB composite is a promising adsorbent for treatment of anionic and cationic dyes in effluent wastewaters. (C) 2012 Elsevier B.V. All rights reserved.
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