Mercury Removal from Aqueous Solution Using Coke-Derived Sulfur-Impregnated Activated Carbons

被引：41

作者：

Cai, Jenny H. ^{[1
]}

Jia, Charles Q. ^{[1
]}

机构：

[1] Univ Toronto, Dept Chem Engn & Appl Chem, Toronto, ON M5S 3E5, Canada

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2010年 / 49卷 / 06期

关键词：

ADSORPTION; WATER; CADMIUM; SURFACE; WASTE; IONS;

D O I：

10.1021/ie901194r

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Sulfur-impregnated activated carbons (SIACs) produced from oil-sands fluid coke by KOH-SO2 activation were applied to remove mercury ions from aqueous solutions. A pseudo-first-order rate expression can describe the Hg2+ adsorption behavior of SIACs produced in this study. The rate constants were found to be 0.01-0.102 min(-1). The Hg2+ adsorption capacities of the examined SIACs ranged from 43 to 72 mg/g, which were comparable to those reported in the literature (35-100 mg/g) and that of a commercial SIAC (41 mg/g). The adsorption capacity increased with increasing Specific Surface area (S-BET) of the SIACs, and a positive correlation was found between the S-BET-normalized adsorption capacity and the total sulfur content of the SIACs. Elemental sulfur, disulfide, and thiophene seemed particularly effective in Hg2+ adsorption, as SIACs with these sulfur compounds showed higher adsorption capacities in general.

引用

页码：2716 / 2721

页数：6

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