ADSORPTION OF Cr(VI) ONTO CROSSLINKED CHITOSAN MICROBEADS - NEW KINETIC AND THERMODYNAMIC CORRELATIONS USING CONTINUOUS ISOTHERMAL MICROCALORIMETRY.

被引：4
作者：
Silva, Rivaldo Cardoso [1 ]
Andrade, Marcos Antonio S., Jr. [1 ]
Cestari, Antonio Reinaldo [1 ]
机构：
[1] Univ Fed Sergipe, Dept Quim, Ctr Ciencias & Estudos Tecnol, BR-49100000 Sao Cristovao, SE, Brazil
来源：
QUIMICA NOVA | 2010年 / 33卷 / 04期
关键词：
chitosan; Cr(VI) adsorption; microcalorimetry; FULL FACTORIAL DESIGN; AQUEOUS-SOLUTIONS; METAL-IONS; REMOVAL; CALORIMETRY; BEHAVIOR; DYE; RED;
D O I：
10.1590/S0100-40422010000400022
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
ADSORPTION OF Cr(VI) ONTO CROSSLINKED CHITOSAN MICROBEADS NEW KINETIC AND THERMODYNAMIC CORRELATIONS USING CONTINUOUS ISOTHERMAL MICROCALORIMETRY. 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.
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收藏
页码：880 / 884
页数：5
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