Removal of fluoride ions from aqueous solution by conducting polypyrrole

被引：108

作者：

Karthikeyan, M. ^{[1
]}

Satheeshkumar, K. K. ^{[1
]}

Elango, K. P. ^{[1
]}

机构：

[1] Gandhigram Rural Univ, Dept Chem, Gandhigram 624302, India

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 167卷 / 1-3期

关键词：

Adsorption; Defluoridation; Isotherms; Polypyrrole; ADSORPTION; WATER; EQUILIBRIUM; DEFLUORIDATION; CHITOSAN;

D O I：

10.1016/j.jhazmat.2008.12.141

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Conducting polypyrrole was found to possess potential efficiency to remove fluoride ions from aqueous solutions. The amount of fluoride ions removed per unit mass of the adsorbent, at 30 degrees C from 10 mg/L fluoride ion solution, was estimated to be 6.37 mg/g. Batch sorption studies have been carried out to determine the effect of initial concentration of the sorbate, agitation time, adsorbent dose, pH, co-ions and temperature on the removal of fluoride by polypyrrole. The sorptive removal was found to be strongly pH and temperature dependent. The experimental data fitted well to the Freundlich and Dubinin-Radushkevick (D-R) isotherms. Thermodynamic parameters such as Delta H-0, Delta S-0 and AGO were calculated indicating that the adsorption process was spontaneous and exothermic. FT-IR spectral studies suggested that the mechanism of fluoride ions removal follow chemisorption. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：300 / 305

页数：6

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