Use of bulk liquid membrane for the removal of chromium (VI) from aqueous acidic solution with tri-n-butyl phosphate as a carrier

Selection of design parameters and optimization of operating parameters of soybean oil-based bulk liquid membrane for Cu(II) removal and recovery from aqueous solutions

“…This denotes that the main effects C (stirring speed) and D (temperature) are the primary operating parameters that influence % recovery relative to the other parameters. Two of these parameters are associated to the fluidity or viscosity [20] of the soybean oil-based M phase which is generally more viscous than the classical petroleum-based M phase [21]. This implies that the viscosity of M phase is the most important factor that governs the Cu(II) transport through soybean oil-based BLM and this is consistent with the previous findings [22].…”

“…The optimum values of parameters obtained were then assessed by the composite desirability, which carries a value from 0 to 1, to determine the degree of satisfaction of the optimum values for the ultimate goal of response [19]. This implies that stirring of either the F, M, or all phases inclined to improve the transport of Cu(II) from F into M phases by minimizing the boundary layers in the aqueous and organic phases [20]. The corresponding % recovery achieved in these cases are, however, much lower, which are about 10% only or lower.…”

Extraction Behaviour of Cu2+ Ions with Used Cooking Oil-Based Organic Solvent

“…It was found that the %E did not vary much when the temperature was increased from 25 to 47 o C. Theoretically, high temperature tends to reduce the viscosity of organic phase which would increase the diffusion rate of solutes in the organic phase. This hypothesis is supported by findings from previous researchers like Mortaheb et al [12] and Muthuraman et al [13]. However, in this study, no significant effect was observed on the Cu 2+ ion extraction between room temperature and other higher temperatures.…”

Selective Transport of Silver(I) Cation Across a Bulk Liquid Membrane Containing Bis-β-enamino Ester as Ion Carrier

“…However, further increase in the stirring rate results in some decrease in the transport efficiency of the metal cation owing to the high turbulence flow caused by stirring, which possibly causes the displacement of some carrier molecules from the membrane. Similar behavior has been observed by Muthuraman et al 37 at higher stirring speed.…”