Removal of fluoride from drinking water by natural stilbite zeolite modified with Fe(III)

被引：161

作者：

Sun, Youbao ^{[1
,2
]}

Fang, Qinghua ^{[1
]}

Dong, Junping ^{[1
]}

Cheng, Xiaowei ^{[3
]}

Xu, Jiaqiang ^{[1
]}

机构：

[1] Shanghai Univ, Dept Chem, Shanghai 200444, Peoples R China

[2] Shimadzu Int Trading Shanghai Co Ltd, Shanghai 200052, Peoples R China

[3] Fudan Univ, Dept Chem, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China

来源：

DESALINATION | 2011年 / 277卷 / 1-3期

关键词：

Removal; Fluoride; Modified; Ferric; STI zeolite; SELECTIVE CATALYTIC-REDUCTION; AQUEOUS-SOLUTION; BRACKISH-WATER; ADSORPTION; DEFLUORIDATION; SURFACE; ION;

D O I：

10.1016/j.desal.2011.04.013

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Stilbite zeolite (STI), a natural zeolite with high crystallinity and an open pore system, was modified with FeCl3 solution for the removal of fluoride from drinking water. The parent STI and modified STI (Fe(III)-STI) were characterized by FTIR, scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Adsorption of fluoride on modified STI (Fe(III)-STI) was studied as a function of contact time, adsorbent dose, initial concentration, pH and coexisting ions. Fluoride concentration can be reduced down to the lower level of 1 mg L-1 the optimum condition (with solid/solution ratio of 1:100 and the contact time of 2 h and pH 6.94) when initial fluoride concentration of 10 mg L-1 is employed. The fluoride adsorption on Fe(III)-STI zeolite is well described by the Langmuir adsorption model, and the maximum fluoride adsorption capacity is 2.31 mg g(-1). The kinetic result indicates that the adsorption of fluoride on the modified natural zeolite follows pseudo-first-order model. The possible mechanism on fluoride adsorption on Fe(III)-STI zeolite is also discussed. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：121 / 127

页数：7