Adsorption of cadmium (II) and zinc (II) on boron enrichment process waste in aqueous solutions: Batch and fixed-bed system studies

被引：108

作者：

Atar, Necip ^{[2
]}

Olgun, Asim ^{[2
]}

Wang, Shaobin ^{[1
]}

机构：

[1] Curtin Univ, Dept Chem Engn, Perth, WA 6845, Australia

[2] Univ Dumlupinar, Dept Chem, Fac Arts & Sci, Kutahya, Turkey

来源：

CHEMICAL ENGINEERING JOURNAL | 2012年 / 192卷

关键词：

Cadmium; Zinc; Adsorption; Waste material; Kinetic study; SUGAR-INDUSTRY WASTE; BAGASSE FLY-ASH; NATURAL ZEOLITE; HEAVY-METALS; REMOVAL; WATER; LEAD; IONS; ACID; RED;

D O I：

10.1016/j.cej.2012.03.067

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Adsorption performance of a waste material from boron enrichment process (BW) in removing zinc (II) and cadmium (II) ions from aqueous solution was studied in batch and fixed bed reactors. The optimum conditions for the treatment process were obtained by observing the influences of solution pH, contact time, initial solution concentration, and adsorbent dosage. The adsorption of the two metal ions showed rapid uptake on the waste in the initial 40 min. Kinetic and equilibrium studies indicated that adsorption of the heavy metal ions from solution follows the sequence of Cd2+ > Zn2+ and the Langmuir adsorption isotherm. The kinetic data were fitted closely to a pseudo-second-order model. Ion exchange between Ca2+ with Cd2+/Zn2+ was found to be the adsorption mechanism. Batch and column tests demonstrated that BW is a highly effective adsorbent for metal ion removal. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：1 / 7

页数：7

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