Use of anion clay hydrotalcite to remove coloured organics from aqueous solutions

被引：161

作者：

Orthman, J

Zhu, HY ^{[1
]}

Lu, GQ

机构：

[1] Univ Sydney, Electron Microscop Unit, Sydney, NSW 2006, Australia

[2] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia

[3] Univ Queensland, Sch Engn, Nanomat Ctr, Brisbane, Qld 4072, Australia

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2003年 / 31卷 / 01期

基金：

澳大利亚研究理事会;

关键词：

anion clay; hydrotalcite; ion exchange; coloured organics; environmental purification; regeneration;

D O I：

10.1016/S1383-5866(02)00158-2

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Anion clay hydrotalcite sorbents were prepared to investigate their adsorption capabilities in the removal of coloured organic substances from various aqueous systems. Anion clay hydrotalcite was found to be particularly effective at removing negatively charged species. Its excellent uptake levels of anionic species can be accounted for by its high surface area and anion exchange ability. That is, coloured substances can be adsorbed on the surface or enter the interlayer region of the clay by anion exchange. In the adsorption of Acid Blue 29 on the anion clay hydrotalcite, an equilibrium time of 1 h with dye removal exceeding 99% was obtained. The hydrotalcite was found to have an adsorption capacity marginally below that of commercial activated carbon. It should be noted that the spent sorbents can be regenerated easily by heating at 723 K to remove all adsorbed organics. The reused sorbents displayed greater adsorption capabilities than the newly prepared hydrotalcite. Hence, the anion clay hydrotalcite is easily recoverable and reusable such that it is a promising sorbent for environmental and purification purposes. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：53 / 59

页数：7

共 17 条

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