ADSORPTION OF HEXAVALENT CHROMIUM IN THE CHEMICALLY MODIFIED RICE HUSK

被引：0
|
作者：
Eggs, Nancy [1 ]
Salvarezza, Susana [1 ]
Azario, Ricardo [1 ]
Fernandez, Nicolas [1 ]
Garcia, Maria del C. [1 ]
机构：
[1] Univ Tecnol Nacl, Fac Reg Concepc Uruguay, Dept Mat Basicas, Ingeniero Pereira 676, RA-3260 Concepcion Del Uruguay, Entre Rios, Argentina
来源：
AVANCES EN CIENCIAS E INGENIERIA | 2012年 / 3卷 / 03期
关键词：
hexavalent chromium; rice husk; bioadsorbent; adsorption;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The aim of this study was to evaluate kinetic factors that affect the adsorption of chromium (VI) in solution using as bioadsorbent the chemically modified rice husk with either potassium hydroxide 1% m/m or 1M phosphoric acid. It was studied the adsorption of chromium (VI) by considering the following parameters pH, incubation time, bioadsorbent mass and poison initial concentration. The determination of hexavalent and total chromium was performed by the method of diphenylcarbazide and atomic absorption spectrophotometry, respectively. Chemical treatment with potassium hydroxide or phosphoric acid rice husk showed an increase in the adsorption of the poison. Kinetic analysis of the adsorption of chromium (VI) suggests that the process is favorable when working at acidic pH (less than 2), increases with the mass of bioadsorbent and contact time.
引用
收藏
页码：141 / 151
页数：11
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