Remoção de compostos fenólicos de soluções aquosas utilizando carvão ativado preparado a partir do aguapé (Eichhornia crassipes): estudo cinético e de equilíbrio termodinâmico

Química Nova

Charles S. Barbosa¹  Sirlane Aparecida Abreu Santana¹  Cícero Wellington Brito Bezerra¹  Hildo Antonio Dos Santos Silva¹ 

[1] ,Universidade Federal do Maranhão Departamento de Química São Luís MA ,Brasil

关键词: activated carbon;    adsorption;    phenol;   

DOI  :  10.5935/0100-4042.20140066

来源: SciELO

【 摘 要 】

Activated carbon was produced from the water hyacinth (CAA) by impregnation with ZnCl2 (1:2), followed by pyrolysis at 700 ºC, under N2. 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 ºC. Thermodynamic data at the solid-liquid interface suggests an endothermic, spontaneous and environmentally-friendly process.

【 授权许可】

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