期刊
DESALINATION
卷 274, 期 1-3, 页码 97-104出版社
ELSEVIER
DOI: 10.1016/j.desal.2011.01.077
关键词
Malachite green; Adsorption; Brown-rotted wood; Kinetics; Thermodynamics
资金
- President Foundation of Hefei Institutes of Physical Science, Chinese Academy of Sciences [075HX24581]
- National Basic Research Program of China [2007CB936602]
- Chinese Academy of Sciences
A novel approach to prepare adsorbent from pine tree root decayed by brown-rot fungi (BRW) has been tried for the first time to remove malachite green (MG) from aqueous solutions. The adsorption capacity of MG was increased 19.45% compared with the pine sawdust. The adsorption capacity was studied by varying the parameters such as initial dye concentration, adsorbent dose, temperature and pH value. Optimal adsorption capacity (42.63 mg/g) and rate (99.41%) was obtained at near neutral pH. Characterization of the biosorbent was performed using scanning electron microscope (SEM), energy dispersive X-ray spectroscope (EDS) and Fourier transform-infrared (FTIR) spectroscopy. The kinetic and equilibrium studies suggest that the adsorption follows Langmuir isotherm and the pseudo-second-order model. Together with the evaluation of the thermodynamic parameters such as Gibbs free energy, enthalpy and entropy, our results showed that MG adsorption onto BRW was mainly a spontaneous, endothermic and chemisorption process. (C) 2011 Elsevier B.V. All rights reserved.
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