Hydrous ferric oxide as an adsorbent in water treatment - Part 2. Adsorption studies

被引：56

作者：

Streat, M. ^{[1
]}

Hellgardt, K. ^{[1
]}

Newton, N. L. R. ^{[1
]}

机构：

[1] Univ Loughborough, Dept Chem Engn, Loughborough LE11 3TU, Leics, England

来源：

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION | 2008年 / 86卷 / B1期

关键词：

arsenic; granular ferric hydroxide; adsorption isotherms; adsorption mechanisms; column studies; elution; regeneration;

D O I：

10.1016/j.psep.2007.10.008

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The mechanism of arsenic adsorption onto hydrous granular ferric oxide is discussed in detail. The effect of arsenic speciation and complexation. with the granular ferric hydroxide surface is discussed in relation to batch equilibration studies. Despite the complex nature of the binding mechanism, a Langmuir model provided a satisfactory fit of the data. Mini-column experiments have shown the effective sorption of arsenic from water in the pH range 7-8 and confirmed efficient elution using dilute mineral acid. Granular ferric hydroxide can be used for the removal of trace As(V) from water, eluted and recycled and moreover, the release of iron from the adsorbent was found to be negligible under appropriate operating conditions. (C) 2007 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

引用

页码：11 / 20

页数：10

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