Competitive adsorption of Cu (II) and Zn (II) on impregnate raw Algerian bentonite and efficiency of extraction

被引：33

作者：

Bouazza, Djamila ^{[1
]}

Miloudi, Hafida ^{[1
]}

Adjdir, Mehdi ^{[2
]}

Tayeb, Abdelkader ^{[1
]}

Boos, Anne ^{[3
]}

机构：

[1] Univ Oran 1 Ahmed Ben Bella, Lab Mat Chem, Oran, Algeria

[2] KIT, Inst Funct Interfaces Sect, D-76344 Karlsruhe, Germany

[3] Univ Strasbourg, CNRS, Inst Pluridisciplinaire Hubert Curien, ECPM,UMR 7178, Strasbourg, France

来源：

APPLIED CLAY SCIENCE | 2018年 / 151卷

关键词：

Raw Algerian bentonite; Impregnated; Heavy metals; Acylpyrazolone; Separation; Regeneration; AQUEOUS-SOLUTIONS; HEAVY-METALS; MONTMORILLONITE CLAYS; ORGANIC EXTRACTANTS; DESORPTION BEHAVIOR; NA-MONTMORILLONITE; COPPER IONS; SORPTION; REMOVAL; KINETICS;

D O I：

10.1016/j.clay.2017.10.026

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Impregnated homoionic raw Algerian bentonite (HB) with high basal spacing was prepared to remove a copper (Cu2+) and zinc (Zn2+) from 0.33 M (Na+, H+)SO42- sulphate medium in aqueous solutions. The impregnated solid was characterized by X-ray diffraction (XRD), Fourier- Transform Infrared (FTIR) and Ultra-violet (UV). The effect of contact time, initial pH of a solution, heavy metal concentration and ligand concentration on the adsorption efficiency were investigated. Pseudo-first/s orders isotherms are applied to determine the efficiency of impregnate solid. The experimental data fitted well with the pseudo-second order model for Cu2+ and Zn2+ adsorption. Maximum capacities for Cu2+ and Zn2+ were 440 mmol/kg and 32 mmol/kg respectively. However, the adsorption is selective to copper in binary system. Moreover, impregnated solid was also regenerated and reused for subsequent recovery.

引用

页码：118 / 123

页数：6

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