Removal of acid blue 9, food yellow 3 and FD&C yellow nº 5 dyes from aqueous solutions using activated carbon, activated earth, diatomaceous earth, chitin and chitosan: equilibrium studies and thermodynamic

Química Nova

Universidade Federal do Rio Grande, Rio Grande, Brasil¹  Dotto, Guilherme Luiz¹  Vieira, Mery Luiza Garcia¹  Gonçalves, Janaína Oliveira¹  Pinto, Luiz Antônio de Almeida¹ 

关键词: activated carbon;    chitosan;    enthalpy.;   

DOI  :  10.1590/S0100-40422011000700017

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This work compared activated carbon, activated earth, diatomaceous earth, chitin and chitosan to removal acid blue 9, food yellow 3 and FD&C yellow nº 5 dyes from aqueous solutions with different pH values (2-10). In the best process condition for each dye, equilibrium studies were carried out at different temperatures (from 298 to 328 K) and Langmuir, Freundlich, Redlich-Peterson, Temkin and Dubinin-Radushkevich models were fitted with experimental data. In addition, entropy change, Gibbs free energy change and enthalpy change were obtained in order to verify the thermodynamic adsorption behavior.

【 授权许可】

Unknown