Arsenic removal from aqueous solutions by adsorption on red mud

被引：21

作者：

Altundogan, HS ^{[1
]}

Altundogan, S ^{[1
]}

Tümen, F ^{[1
]}

Bildik, M ^{[1
]}

机构：

[1] Firat Univ, Dept Chem Engn, TR-23279 Elazig, Turkey

来源：

WASTE MANAGEMENT | 2000年 / 20卷 / 08期

关键词：

arsenic adsorption; red mud; langmuir isotherm;

D O I：

暂无

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Use of red mud, which is a waste product from bauxite processing, has been explored as an alternate adsorbent for arsenic in this study. The tests showed that the alkaline aqueous medium (pH 9.5) favored the removal of As(III), whereas the pH range from 1.1 to 3.2 was effective for As(V) removal. The process of arsenic adsorption follows a first-order rate expression and obeys the Langmuir's model. It was found that the adsorption of As(III) was exothermic, whereas As(V) adsorption was endothermic. It would be advantageous to use this residue as an adsorbent replacing polyvalent metal salts. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：761 / 767

页数：7

共 25 条

[1] STUDIES OF DISSOCIATION OF OXIDE SURFACES AT LIQUID-SOLID INTERFACE [J].