Adsorção de Cr(VI) em esferas reticuladas de quitosana: novas correlações cinéticas e termodinâmicas utilizando microcalorimetria isotérmica contínua

Química Nova

Rivaldo Cardoso Silva¹  Marcos Antonio S. Andrade Jr¹  Antonio Reinaldo Cestari¹ 

[1] ,Universidade Federal de Sergipe Centro de Ciências e Estudos de Tecnologia Departamento de QuímicaSão Cristóvão SE ,Brasil

关键词: chitosan;    Cr(VI) adsorption;    microcalorimetry;   

DOI  :  10.1590/S0100-40422010000400022

来源: SciELO

【 摘 要 】

The synthesis and characterization of crosslinked chitosan microbeads and their application in the removal of Cr(VI) are described. New kinetic and thermodynamic parameters of Cr(VI) adsorptions processes were found using continuous isothermal calorimetry. All adsorption processes are exothermic in nature. However, a multivariate statistical analysis have pointed out that adsorption enthalpies were affected by important binary interactions of the initial Cr(VI) in solution and temperature. The adsorption energetic data were well fitted to a kinetic exponential model, which have indicated fractionary adsorption kinetic orders.

【 授权许可】

CC BY-NC   
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