期刊
CHEMOSPHERE
卷 111, 期 -, 页码 225-231出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2014.03.118
关键词
Bamboo; Methylene blue; Adsorption isotherms; Kinetics; Biosorbent
资金
- Natural Science Foundation of China [21207117, 21373275]
- New Century Excellent Talents in University [NCET-12-0668]
Chemically modified bamboo (CMB) was utilized for removing methylene blue (MB) from aqueous media in the present study. The adsorbent was characterized by Fourier transform infrared (FTIR) spectra and elemental analysis, which confirms that carboxyl groups and diethylenetriamine were successfully introduced into the surface of bamboo. The effects of initial MB concentration (100-900 mg L-1), contact time (15-315 min), the pH of the solution (3-10), temperature (298-318 K), adsorbent dosage (0.4-2.6 g L-1) and salt concentration on the adsorption efficiency of CMB towards MB were investigated. It was found that the adsorption of MB in CMB fits Langmuir mode well, and the maximum adsorption capacity of CMB achieved 606 mg g(-1) at 298 K, which is much higher than those obtained from previously investigated bioadsorbents. The adsorption kinetics can be described by pseudo-second-order kinetic model, and the adsorption of MB on CMB was an exothermic process. The results of the present study suggest that CMB is an effective biosorbent for removal of organic pollutants from aqueous solutions. (C) 2014 Elsevier Ltd. All rights reserved.
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