ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Highly selective transport of Ag⁺ from a mixture of some bivalent cations using polymer inclusion membrane by 2,2′-dithio-bis-benzothiazole as a carrier

Masoumeh Darbanian and Azizollah Nezhadali

Department of Chemistry, Payame Noor University, Tehran, Iran

E-mail: aziz_nezhadali@pnu.ac.ir

Received: 30 September 2023  Accepted: 29 December 2023

Abstract:

In this research, polymer inclusion membranes (PIMs) were performed in a series of competitive and selective metal-ion transport experiments. The source phase was contained equimolar concentration of Mn⁺², Co⁺², Ni⁺², Cu⁺², Zn⁺², Cd⁺², Ag⁺, and Pb⁺², all as their nitrate salts. The transport experiments of metal cations were carried out by 2,2′-dithio-bis-benzothiazole in PIM for the first time. The nine essential factors, including cation concentration, donor phase pH, acceptor pH, reagent (Na₂S₂O₃), ligand concentration, run time, the effect of Fe₂O₃NPs, plasticizer type, and stirring rate, were optimized using Plackett–Burman design, and central composite design, methods. PB screening showed that the pH of the acceptor phase, ligand concentration, and running time was more affected than other studied parameters at optimal conditions. The values of acceptor phase pH, ligand concentration, and running time were obtained as 1.32, 0.012 (mg L⁻¹), and 35 (h), respectively. Under optimal conditions, cellulose-triacetate-based PIMs were successfully used for selective transport and determination of Ag+ concentration in some real and simulated samples using an atomic absorption spectrometer. This new and selective method was used for transport of Ag+ ions from vegetable and fruit samples, successfully. This method showed that the values of flux rate (J) are found to be from (6.6 to 8.37) × 10^–6 mol h⁻¹, and the silver rejection (R_s %) ranged from 93.68 to 94.97%.

Graphical abstract

Keywords: Polymer inclusion membranes; 2,2′-Dithio-bis-benzothiazole (DTB); Silver ions; Selective transport; Atomic absorption spectrometer

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-023-03299-w

Chemical Papers 78 (5) 3125–3136 (2024)