kinetics of facilitated transport of zn(ii) from leach liquor of spent lts catalyst across bulk liquid membrane

A kinetic study on facilitated transport of zn(ii) from leach liquor of spent low-temperature shift catalyst (lts) has been investigated. primarily, the hydrometallurgical leaching of zn and cu from the spent lts catalyst was performed. moreover, the selective transport of zn from leach liquor was facilitated by bis (2-ethylhexyl) phosphate (hdehp) across bulk liquid membrane. the aqueous phase ph plays an important role in the selective transport of zn from feed to stripping phase. it was observed that more than 90% of zn was extracted at an aqueous phase ph of 3. the kinetics of the transport was analyzed using a kinetic law of two consecutive irreversible first-order reactions. kinetic parameters such as k1, k2, rm, tm, and flux values were evaluated by fitting the experimental data. the order of the flux for the transport of zn(ii) in three diluents was observed as dichloromethane > chloroform > carbon tetrachloride.