Liquid-liquid extraction of copper(II), zinc(II), cadmium(II), and lead(II) from aqueous solution and sewage effluent using phenoxy-amino ligands

被引：5
|
作者：
Nyamato, George S. [1 ]
Wambugu, Kelvin [1 ]
Kiratu, John [1 ]
Ojwach, Stephen O. [2 ]
机构：
[1] Univ Embu, Dept Phys Sci, POB 6-60100, Embu, Kenya
[2] Univ KwaZulu Natal, Sch Chem & Phys, Scottsville, South Africa
来源：
WATER SCIENCE AND TECHNOLOGY | 2022年 / 85卷 / 10期
关键词：
heavy metals; liquid-liquid extraction; phenoxy-amino ligands; wastewater; HEAVY-METAL REMOVAL; BINDING-PROPERTIES; COORDINATION CHEMISTRY; DRINKING-WATER; MERCURY; COMPLEXES;
D O I：
10.2166/wst.2022.164
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The phenoxy-amino ligands 2-(((2-(diethylamino)ethyl)amino)methyl)phenol (L1) and 2-(((2-mercaptoethyl)amino)methyl)-phenol (L2) were studied as model chelating agents for liquid-liquid extraction of copper(II), zinc(II), cadmium(II) and lead(II) cations from water using dichloromethane-water biphasic system. The relative affinities of these chelating ligands for copper(II), zinc(II), cadmium(II) and lead(II) by liquid-liquid extraction were found to be in the order copper(II)> zinc(II)> cadmium(II)> lead(II). The ligands L1 and L2 showed binding efficiencies ranging from 78%-97% for copper(II), 75%-91% for zinc(II), 76%-92% for cadmium(II) and 59%-67% for lead(II). The extraction protocol was successfully applied to sewage effluent.
引用
收藏
页码：2993 / 3001
页数：9
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