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

Wongkaew, Krirkratthawit; Mohdee, Vanee; Pancharoen, Ura; Arpornwichanop, Amornchai; Lothongkum, Anchaleeporn W.

doi:10.1016/j.jiec.2017.06.002

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

Author(s)

Wongkaew, Krirkratthawit

Mohdee, Vanee

Pancharoen, Ura

Arpornwichanop, Amornchai

Lothongkum, Anchaleeporn W.

Date Issued

October 25, 2017

Type

Article

DOI

10.1016/j.jiec.2017.06.002

Abstract

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 328.15 K. Overall mass transfer resistance (R) was 146.612 × 10⁴ s/cm. The separation process was exothermic (ΔHex ⁰ = −975.20 kJ/mol) and spontaneous (ΔGex ⁰ = −326.447 J/mol). The Ea of 1.673 kJ/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.

Citation

Journal of Industrial and Engineering Chemistry, 54, 278-289, 2017

Subjects

HFSLM

Non-toxic diluents

Platinum(IV)

Sunflower oils

Thermodynamics