Remoção dos corantes azul brilhante, amarelo crepúsculo e amarelo tartrazina de soluções aquosas utilizando carvão ativado, terra ativada, terra diatomácea, quitina e quitosana: estudos de equilíbrio e termodinâmica

Química Nova

Guilherme Luiz Dotto¹  Mery Luiza Garcia Vieira¹  Janaína Oliveira Gonçalves¹  Luiz Antônio De Almeida Pinto¹ 

[1] ,Universidade Federal do Rio Grande Escola de Química e Alimentos Rio Grande RS ,Brasil

关键词: activated carbon;    chitosan;    enthalpy;   

DOI  :  10.1590/S0100-40422011000700017

来源: SciELO

【 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】

CC BY-NC   
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