Extraction/transportation of Co2+ metal ions with bis(2-ethylhexyl) phosphate dissolved in kerosene using a multidropped liquid membrane technique

Abstract

The transport properties of Co 2+ ions from the aqueous donor phase to aqueous acceptor phase with the recently developed multidroplet liquid membrane (MDLM) extraction system were studied. This system serves as a continuous process for the transportation of ions and requires fewer reagents for starting and conducting the procedure. Moreover, the procedure results in fewer waste chemicals and mixtures in comparison to traditional extraction methods. During extraction, bis(2-ethylhexyl) phosphate (D2EHPA) was used as a carrier material and 5% potassium thiocyanate (KSCN) solution was used to obtain a colored complex for UV-Vis detection. By means of several experiments, the optimum D2EHPA concentration, pH range for both donor and acceptor phases, and temperature range effect on transport kinetics were investigated. In the extraction of cobalt ions with the MDLM system, the activation energy was calculated as E a = 13.80 kcal mol −1 , and it was found that the extraction was chemically controlled since it was greater than 10 kcal mol −1 .

Predictive modeling of pH on the transport of Co(II) Ions from aqueous solutions through supported ceramic polymer membrane

“…pH levels have a strong impact on ion transfer mechanisms such as diffusion, complexity and electrostatic reactions between the membrane and cobalt ions. Collect a comprehensive dataset of previous experimental measurements on the transfer of cobalt ions through ceramic-supported polymer membranes with different pH values 19 . A benefit is that ceramic materials can enhance the system's extraction efficiency and capacity.…”