Separation of platinum(IV) across hollow fiber supported liquid membrane using non-toxic diluents: Mass transfer and thermodynamics

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) 2017, 54(0), , pp.278-289
• Main Authors: Wongkaew, Krirkratthawit, Mohdee, Vanee, Pancharoen, Ura, Arpornwichanop, Amornchai, Lothongkum, Anchaleeporn W.
• Format: Article
• Language: English
• Subjects: HFSLM; Non-toxic diluents; Platinum(IV); Sunflower oils; Thermodynamics; 화학공학
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2017.06.002

[Display omitted] •Non-toxic diluents were applied to separate platinum(IV) across HFSLM.•91.41% extraction and 81% stripping were obtained by sunflower oil at 328.15K.•Overall mass transfer resistance (1/K) of 146.612×104s/cm was obtained.•The separation process is exothermic (ΔHex0=−975.20kJ/mol).•A modified Apelblat model gave an excellent match for predicting the extraction of platinum(IV). Non-toxic diluents were studied and compared with toxic diluents for separation of platinum(IV) across hollow fiber supported liquid membrane. 91.41% extraction and 81% stripping of platinum(IV) was observed for sunflower oils at 328.15K. Overall mass transfer resistance (R) was 146.612×104s/cm. The separation process was exothermic (ΔHex0=−975.20kJ/mol) and spontaneous (ΔGex0=−326.447J/mol). The Ea of 1.673kJ/mol indicated that the diffusion of complex species across the liquid membrane controlled the mass transfer step. Moreover, a modified Apelblat model gave an excellent match for predicting the extraction behavior of platinum(IV) at 1.2818% RMSD.