Mass transfer resistance and response surface methodology for separation of platinum (IV) across hollow fiber supported liquid membrane

Abstract

The separation of platinum (IV) from wastewater across hollow fiber supported liquid membrane was successful in reaching 96% extraction and 88% stripping using 10% (v/v) trioctylmethyl-ammonium chloride (Aliquat 336) as the extractant. The mass transfer resistances were (1/ka) 3.297 × 104 s/cm, (1/km) 0.164 × 104 s/cm, (1/ko) 3.404 × 104 s/cm and (1/K) 6.865 × 104 s/cm. The system was governed by the mass transfer resistance from the liquid-membrane. Response surface methodology was used to qualify and estimate the influence of operating conditions. Predicted model with experimental data were in good agreement at a standard deviation of 1%.