Comparison of the effects of anionic and cationic surfactant concentration on mean drop size in a mixer-settler extractor

► In this study, the effect of Aniline and SDS surfactant on mean drop size was investigated in a mixer-settler. ► For this purpose, the effects of impeller speed and hold-up on the mean drop size were examined with and without surfactant. ► The results revealed that D32, in Aniline system is larger than D32 in SDS system. ► The system with Aniline surfactant has a better agreement with Hinze-Kolmogorov's theory.