Role of metal ion incorporation in ion exchange resin on the selectivity of fluoride

被引:98
作者
Viswanathan, Natrayasamy [1 ]
Meenakshi, S. [1 ]
机构
[1] Gandhigram Rural Univ, Dept Chem, Gandhigram 624302, Tamil Nadu, India
关键词
Indion FR 10; Modification; Defluoridation; Adsorption; Complexation; AQUEOUS-SOLUTION; PHOSPHATE IONS; REMOVAL; SORPTION; ADSORPTION; WATER; DEFLUORIDATION; EQUILIBRIUM; DIALYSIS; BIOMASS;
D O I
10.1016/j.jhazmat.2008.05.118
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Indion FR 10 resin has sulphonic acid functional group (H+ form) possesses appreciable defluoridation capacity (DC) and its DC has been enhanced by chemical modification into Na+ and Al3+ forms by loading respective metal ions in H+ form of resin. The DCs of Na+ and Al3(+) forms were found to be 445 and 478 mg F-/kg, respectively, whereas the DC of H+ form is 265 mg F-/kg at 10 mg/L initial fluoride concentration. The nature and morphology of sorbents are characterized using FTIR and SEM analysis. The fluoride sorption was explained using the Freundlich, Langmuir and Redlich-Peterson isotherms and kinetic models. The calculated thermodynamic parameters such as Delta G degrees, Delta H degrees, Delta S degrees, and sticking probability (S-center dot) explains the nature of sorption. Comparison was also made by the elution capacity of these resins in order to select a cost effective material. A field trial was carried out to test the suitability of the resins with fluoride water collected from a nearby fluoride-endemic area. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:920 / 930
页数:11
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