Transport and Separation of the Silver Ion with n-decanol Liquid Membranes Based on 10-undecylenic Acid, 10-undecen-1-ol and Magnetic Nanoparticles

Gheorghe Nechifor; Florentina Mihaela Păncescu; Paul Constantin Albu; Alexandra Raluca Grosu; Ovidiu Oprea; Szidonia-Katalin Tanczos; Constantin Bungău; Vlad-Alexandru Grosu; Mihail-Răzvan Ioan; Aurelia Cristina Nechifor

doi:10.3390/membranes11120936

Transport and Separation of the Silver Ion with n-decanol Liquid Membranes Based on 10-undecylenic Acid, 10-undecen-1-ol and Magnetic Nanoparticles

Membranes (Basel). 2021 Nov 27;11(12):936. doi: 10.3390/membranes11120936.

Affiliations

¹ Analytical Chemistry and Environmental Engineering Department, University Politehnica of Bucharest, 1-7 Polizu St., 011061 Bucharest, Romania.
² Radioisotopes and Radiation Metrology Department (DRMR), "Horia Hulubei" National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH), 30 Reactorului St., 023465 Măgurele, Romania.
³ Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, University Politehnica of Bucharest, 1-7 Polizu St., 011061 Bucharest, Romania.
⁴ Department of Bioengineering, University Sapientia of Miercurea-Ciuc, Libertatii St., 500104 Miercurea-Ciuc, Romania.
⁵ Department of Engineering and Management, Faculty of Management and Technological Engineering, University of Oradea, 410087 Oradea, Romania.
⁶ Department of Electronic Technology and Reliability, Faculty of Electronics, Telecommunications and Information Technology, University Politehnica of Bucharest, Iuliu Maniu Blvd., nr. 1-3, 061071 Bucharest, Romania.

Abstract

This paper presents a transport and recovery of silver ions through bulk liquid membranes based on n-decanol using as carriers 10-undecylenic acid and 10-undecylenyl alcohol. The transport of silver ions across membranes has been studied in the presence of two types of magnetic oxide nanoparticles obtained by the electrochemical method with iron electrodes in the electrolyte with and without silver ions, which act as promoters of turbulence in the membrane. Separation of silver ions by bulk liquid membranes using 10-undecylenic acid and 10-undecylenyl alcohol as carriers were performed by comparison with lead ions. The configuration of the separation module has been specially designed for the chosen separation process. Convective-generating magnetic nanoparticles were characterized in terms of the morphological and structural points of view: scanning electron microscopy (SEM), high-resolution SEM (HR-SEM), energy dispersive spectroscopy analysis (EDAX), Fourier Transform InfraRed (FTIR) spectroscopy, thermal gravimetric analysis (TGA), differential scanning calorimetry and magnetization. The process performance (flux and selectivity) was tested were tested for silver ion transport and separation through n-decanol liquid membranes with selected carriers. Under the conditions of the optimized experimental results (pH = 7 of the source phase, pH = 1 of the receiving phase, flow rate of 30 mL/min for the source phase and 9 mL/min for the receiving phase, 150 rot/min agitation of magnetic nanoparticles) separation efficiencies of silver ions of over 90% were obtained for the transport of undecenoic acid and about 80% for undecylenyl alcohol.

Keywords: 10-undecenol carrier; 10-undecilenic acid carrier; bulk liquid membranes; magnetic nanoparticles; oxide nanoparticles; silver separation; silver transport; turbulence promotors.