Removal of insoluble heavy metal sulfides from water

被引：36

作者：

Banfalvi, Gaspar ^{[1
]}

机构：

[1] Univ Debrecen, Dept Anim Anat & Physiol, H-4010 Debrecen, Hungary

来源：

CHEMOSPHERE | 2006年 / 63卷 / 07期

基金：

匈牙利科学研究基金会;

关键词：

heavy metal spill; solubility product; bentonite; carbogen gas; sulfide oxidation;

D O I：

10.1016/j.chemosphere.2005.08.066

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The necessity of heavy metal removal from wastewater has led to increasing interest in absorbents. We have developed a new approach to obtain high metal adsorption capacity by precipitating metal sulfides with sodium sulfide on the surface of bentonite and adhere them to the absorbent. This method allowed to remove approximately 90% of cadmiurn as US from 10(-4)-10(-6) M CdCl2 solutions. Additional reactions are related to the removal of excess sodium sulfide by the release of hydrogen sulfide and oxidation to sulfur using carbogen gas (5% CO2, 95% O-2) followed by aeration. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：1231 / 1234

页数：4

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