Green Synthesis of Iron Nano-Impregnated Adsorbent for Fast Removal of Fluoride from Water

被引：180

作者：

Ali, Imran ^{[1
]}

Alothman, Zeid A. ^{[2
]}

Sanagi, Mohd Marsin ^{[3
,4
]}

机构：

[1] Jamia Millia Islamia, Dept Chem, New Delhi 110025, India

[2] King Saud Univ, Dept Chem, Coll Sci, Riyadh 11451, Saudi Arabia

[3] Univ Teknol Malaysia, Dept Chem, Separat Sci & Technol Grp SepSTec, Fac Sci, Utm Johor Bahru 81310, Johor, Malaysia

[4] Univ Teknol Malaysia, Ibnu Sina Inst Fundamental Sci Studies, Nanotechnol Res Alliance, Utm Johor Bahru 81310, Johor, Malaysia

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2015年 / 211卷

关键词：

Removal of fluoride; Adsorption models; Water treatment; Iron nano-impregnated adsorbent; Mechanism of adsorption; ACTIVATED ALUMINA; WASTE; ADSORPTION; KINETICS; SORPTION; DEGRADATION; COMPOSITE; CATALYST; IONS;

D O I：

10.1016/j.molliq.2015.07.034

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Iron nano-impregnated adsorbent was synthesized, characterized and applied for fluoride subtraction from the water. Maximum fluoride removal (90%) was at 4.0 mg/L concentration, 25.0 min. contact time, 7.0 pH, 2.5 g/L dose and 293 K temperature. Iron nanocomposite adsorbent was selective for fluoride removal. The experimental data obeyed Langmuir, Freundlich and Temldn models. The values Delta G degrees were -1.89, -0.86 and -0.74 kJ/mol at 293, 298 and 303 K temperatures. Delta H degrees value was -7.61 kJ/mol; indicating exothermic adsorption. Delta S degrees value was -2.30 x 10(-2) kJ/mol K; a signal of entropy decrease during adsorption. The adsorption process was in the order of 293 > 298 > 303 K. Kinetic modeling confirmed pseudo-first-order and liquid film diffusion mechanisms. The mechanism of adsorption is also determined. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：457 / 465

页数：9

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