Kinetic and thermodynamic studies on adsorption of fluoride by dolomite

被引：0
|
作者：
Kardhikeyan, G [1 ]
Pius, A [1 ]
Alagumuthu, G [1 ]
机构：
[1] Deemen Univ, Dept Chem, Gandhigram Res Inst, Gandhigram 624302, India
来源：
INDIAN JOURNAL OF CHEMICAL TECHNOLOGY | 2002年 / 9卷 / 05期
关键词：
D O I：
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中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Batch adsorption studies were carried out to determine the effect of adsorbent dose, initial adsorbent concentration and temperature oil the adsorption of fluoride by naturally occurring dolomite. The adsorption of fluoride was found to depend oil temperature and concentration. The adsorption process followed first-order kinetics. The mechanism of adsorption obeyed Langmuir adsorption isotherm indicating an unimolecular layer pattern. Dolomite possesses considerable defluoridation efficiency at neutral pH and hence can be an effective defluoridating material. Thermodynamic studies revealed that the adsorption of fluoride by dolomite is an endothermic process, showing increase in sorption at higher temperature. Also, negative values of DeltaG(o) indicate the spontaneity of the sorption process.
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页码：397 / 401
页数：5
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