REMOVAL OF PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTIONS USING ACTIVATED CARBON PREPARED FROM WATER HYACINTH (Eichhornia crassipes): KINETIC AND THERMODYNAMIC EQUILIBRIUM STUDIES

被引：18
|
作者：
Barbosa, Charles S. [1 ]
Abreu Santana, Sirlane Aparecida [1 ]
Brito Bezerra, Cicero Wellington [1 ]
dos Santos Silva, Hildo Antonio [1 ]
机构：
[1] Univ Fed Maranhao, Dept Quim, BR-65080805 Sao Luis, MA, Brazil
来源：
QUIMICA NOVA | 2014年 / 37卷 / 03期
关键词：
activated carbon; adsorption; phenol; ADSORPTION; WASTE; 2,4,6-TRICHLOROPHENOL; ADSORBENTS; ZEOLITES; ISOTHERM; DYE;
D O I：
10.5935/0100-4042.20140066
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Activated carbon was produced from the water hyacinth (CAA) by impregnation with ZnCl2 (1:2), followed by pyrolysis at 700 degrees C, under N-2. CAA was used for the adsorption of phenol, m-cresol and o-cresol from aqueous solutions, using batch adsorption. The effects of contact time, pH, temperature and concentration on sorption were investigated. Adsorption capacity, calculated using the Langmuir model proved to be dependent on temperature, reaching values of 163.7, 130.2 and 142.3 mg g(-1) for phenol, m-cresol and o-cresol, respectively, at 45 degrees C. Thermodynamic data at the solid-liquid interface suggests an endothermic, spontaneous and environmentally-friendly process.
引用
收藏
页码：447 / 453
页数：7
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