Abstract:Using polyvinylidene fluoride membrane (PVDF) as a supported, kerosene as a membrane solvent, 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (PC-88A) as a flowing carrier, the transportation of Pt(IV) in a dispersion supported liquid membrane (DSLM) was investigated. The effects of the volume ratio of the membrane liquid to stripping phase, the concentrations of HCl in the stripping phase, and the acid concentrations in the feed liquid on the transportation of Pt(IV) were studied. The results show that DSLM play an effective role in the transportation of Pt(IV), when the volume ratio of the membrane liquid to the stripping liquid in the dispersion liquid is 140:60, HCl is used as a stripping liquid and its concentrations is 7.0 mol/L, the concentrations of HCl in the feed phase is 0.5 mol/L. Under the optimum condition and upon Pt(IV) initial concentration with 1.0×10-5 mol/L, Pt(IV) can be completely transported within 130 min, but the transportation rate is only 83.6% through traditional SLM.