TY - JOUR ID - 453 TI - An applied comparison between conventional pre-dispersed solvent extraction (PDSE) contactors and new dissolved nitrogen PDSE (DNPDSE) ones JO - Journal of Mining and Environment JA - JME LA - en SN - 2251-8592 AU - Tavakoli Mohammadi, M. R. AU - Koleini, Seyed M. J. AU - Abdollahy, M. AD - Mining Engineering Department, Tarbiat Modares University, Tehran, Iran Y1 - 2015 PY - 2015 VL - 6 IS - 2 SP - 159 EP - 168 KW - Dissolved Nitrogen Pre-Dispersed Solvent Extraction (DNPDSE) Contractor KW - Pre-Dispersed Solvent Extraction (PDSE) Contractor KW - Colloidal Aphrons (CAs) KW - Metal Extraction KW - Performance Study DO - 10.22044/jme.2015.453 N2 - Efforts to increase the mass transfer coefficient, enhance the contact area, and decrease the power input of contractors have given risen to the development of the pre-dispersed solvent extraction (PDSE) contactor and the devise of the new dissolved nitrogen PDSE (DNPDSE) contactors. The studies conducted after the design of the new contactor to determine the working conditions for its suitable performance (2.5-3.5 bar pressure, 0.1 L/min sparger flow rate, and 1.5 L of the aqueous phase) showed that for all the evaluated conditions (i.e. the pressure, polyaphron type, and dilution percentage), the recovery in the DNPDSE contactor was higher than that in the PDSE one. In addition, pictures of the performance modes of the two contactor indicated the presence of the organic phase in the form of colloidal gas aphrons (CGAs) in the DNPDSE contactor and of polyaphron aggregations in the PDSE one. This is a good reason for the increased copper recovery in the DNPDSE contactor. The best recovery for the extraction process in the DNPDSE contactor was achieved using the anionic polyaphron of sodium dodecylbenzene sulphonate (NaDBS) with five-fold dilution at 3.5 bar. UR - https://jme.shahroodut.ac.ir/article_453.html L1 - https://jme.shahroodut.ac.ir/article_453_c9f587b6306e7d2bd80e46f0cd5f5ada.pdf ER -