期刊
JOURNAL OF ENVIRONMENTAL MANAGEMENT
卷 155, 期 -, 页码 67-76出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2015.03.007
关键词
Acrocomia aculeata; Activated carbon; Adsorption; Copernicia prunifera; Pinus pinea; Rhodamine B
资金
- Junta de Castilla y Leon [VA036A12-2]
- Universidad de Valladolid (Programa de Formacion del Personal Investigador PhD scholarship)
By-products from the wax production process from carnauba palm (leaves), from the extraction of oil from macauba seeds (endocarp) and from pine nut production (shell) have been assessed for activated carbon production, using H3PO4 or CaCl2 for their chemical activation. The resulting activated charcoals have been thoroughly characterized by elemental and thermal analysis, X-ray diffraction, infrared spectroscopy, electron scanning microscopy and N-2 adsorption behavior. Subsequently, their adsorption capacity for the removal of rhodamine B (RhB) from aqueous solutions has been evaluated by studying different parameters: contact time, pH, adsorbent dose, initial dye concentration and solution temperature. The adsorption of RhB followed Freundlich's model in all cases. Kinetic studies indicate that the pseudo-second order model can be used for describing the dynamics of the adsorption process. Thermodynamic parameters have also been evaluated, indicating its endothermic and spontaneous nature. Finally, a preliminary analysis of the impact of cellulose content in the carbon precursor materials has been conducted, by using a mixture of native cellulose with one of the lignocellulosic materials. (C) 2015 Elsevier Ltd. All rights reserved.
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