Selective Separation of Silver(I) Ion Through a Bulk Liquid Membrane Containing 1,1'-(1,3-Phenylene)bis(3-allylthiourea) as Carrier

Azizollah Nezhadali,Alireza Banaei,Zarrin Es'Haghi,Shahriyar Bahar,Jafar Abbasi Shiran

doi:10.5935/0103-5053.20150255

Abstract

The competitive bulk liquid membrane transport of six metal cations from an aqueous source phase (SP) containing Ag+, Pb2+, Cu2+, Zn2+, Co2+ and Ni2+ through an organic membrane phase (MP) facilitated by 1,1'-(1,3-phenylene)bis(3-allylthiourea) as a carrier into an aqueous receiving phase (RP) was studied and compared. Fluxes and selectivities for competitive metal cation transport have been determined in a variety of source solution pH and membrane solvent types. The obtained results showed that the carrier is selective for Ag+ cation. The effect of different experimental conditions that affect the transport efficiency were studied and optimized. In the optimum condition, the transport of a 5 × 10-4 mol L−1 solution of Ag+ cations was observed 92.3 ± 5.3% after 4 h in the presence of equimolar concentrations of other metal cations. A possible application of this carrier system and transport process for separation and recovery of Ag+ cation from real samples has also been examined.

Highlights

Nowadays, rapid industrial development and the diversified character of the world economy led to handle with the large volumes of different types of wastewaters
We studied the competitive bulk liquid membrane transport of six metal cations involving Ag+, Pb2+, Cu2+, Zn2+, Co2+ and Ni2+ with 1,1’-(1,3-phenylene)bis(3-allylthiourea) as a carrier using chloroform (CHCl3), dichloromethane (DCM), 1,2-dichloroethane (1,2-DCE) and nitrobenzene (NB) as an membrane phase (MP)
Selective transport of metal cations by carrier-mediated liquid membrane depends on the nature of the ligand used

Summary

Introduction

Rapid industrial development and the diversified character of the world economy led to handle with the large volumes of different types of wastewaters. As a carrier in the membrane.[35,36] The investigations have established that the kind, number, distance and orientation of the donor atoms of the ligand that are structurally accessible to the complexed cation can affect the transport selectivity and efficiency.[25,26,27] In the preliminary experiment, we tested the ligand ability for the competitive transport of Ag+ cation among some other metal cation such as Pb2+, Cu2+, Zn2+, Co2+ and Ni2+ from SP into the RP through DCM organic solvent as a MP.

Results

Conclusion