采用苯氧基-氨基配体从水溶液和污水中萃取铜（II）、锌（II）、镉（II）和铅（II）。

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

机构信息

Department of Physical Sciences, University of Embu, P.O Box 6-60100, Embu, Kenya E-mail:

School of Chemistry and Physics, University of KwaZulu-Natal, Scottsville, South Africa.

出版信息

Water Sci Technol. 2022 May;85(10):2993-3001. doi: 10.2166/wst.2022.164.

DOI:10.2166/wst.2022.164

PMID:35638801

Abstract

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.

摘要

作为模型螯合剂，研究了苯氧氨基配体 2-(((2-(二乙氨基)乙基)氨基)甲基)苯酚（L1）和 2-(((2-巯基乙基)氨基)甲基)苯酚（L2），用于从水相中用二氯甲烷-水两相体系萃取铜（II）、锌（II）、镉（II）和铅（II）阳离子。通过液液萃取，这些螯合配体对铜（II）、锌（II）、镉（II）和铅（II）的相对亲和力顺序为铜（II）>锌（II）>镉（II）>铅（II）。配体 L1 和 L2 对铜（II）的结合效率范围为 78%-97%，对锌（II）的结合效率范围为 75%-91%，对镉（II）的结合效率范围为 76%-92%，对铅（II）的结合效率范围为 59%-67%。该萃取方案成功应用于污水。