Adsorption of Cr(VI) onto crosslinked chitosan microbeads: new kinetic and thermodynamic correlations using continuous isothermal microcalorimetry

Química Nova

Silva, Rivaldo Cardoso¹  Universidade Federal de Sergipe, São Cristóvão, Brasil¹  Cestari, Antonio Reinaldo¹  Andrade Jr, Marcos Antonio S.¹ 

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

DOI  :  10.1590/S0100-40422010000400022

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown