Magnetic zeolites: a new adsorbent for removal of metallic contaminants from water

被引：306

作者：

Oliveira, LCA ^{[1
]}

Petkowicz, DI ^{[1
]}

Smaniotto, A ^{[1
]}

Pergher, SBC ^{[1
]}

机构：

[1] Univ Fed Lavras, Dept Quim, BR-37200000 Lavras, MG, Brazil

来源：

WATER RESEARCH | 2004年 / 38卷 / 17期

关键词：

zeolite; magnetic adsorbents; metallic contaminants; magnetic zeolites;

D O I：

10.1016/j.watres.2004.06.008

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this work the adsorption features of NaY zeolite with the magnetic properties of iron oxides have been combined in a composite to produce a magnetic adsorbent. These magnetic composites can be used as an adsorbent for metallic contaminants in water and subsequently removed from the medium by a simple magnetic process. The zeolites:iron oxide magnetic composites, were prepared by using NaY with weight ratio of 3:1 and were characterized by powder X-ray diffraction (XRD), magnetization measurements, chemical analyses, N-2 adsorption isotherms and Mossbauer spectroscopy. Nitrogen adsorption isotherms showed that the surface area decreased from 505 m(2)g(-1) for the pure NaY to 353 m(2)g(-1) for the NaY:Fe oxide 3:1 composite. The adsorption isotherms of metal ions Cr3+, Cu2+ and Zn2+ from aqueous solution onto the composites also showed that the presence of iron oxide does not affect the adsorption capacity. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：3699 / 3704

页数：6

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