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Emad Mowafy

Emad Mowafy

University of Hail , Saudi Arabia

Title: Design and evaluation of new ligands with highly extractability and selectivity for palladium from secondary raw material

Biography

Biography: Emad Mowafy

Abstract

Recovery and separation of palladium from their aqueous waste solutions is one of the most important subject from economic and environment viewpoints. In fact, palladium is a very rare metal in the Earth's crust, the worldwide reserves being localized in very few countries. Therefore, the amount of palladium that can be recovered from the so-called secondary resources, that is, recycling of catalytic converters and electronic scrap, is very important. For this purpose, many ligands have been developed and used during the last decades. These ligands have many limitations (e.g. slow kinetic, poor solubility and instability in acidic medium etc. To overcome the situation, it becomes imperative to look for other classes of extractants. Within this context, the present study focusing on using N,N,N',N'-tetra-substituted dithiodiglycolamide derivatives as a novel and promising solvent extraction reagents to mainly perform the separation of Pd from other PGMs and from some commonly associated elements contained in concentrated hydrochloric acid. Liquid–liquid batch extraction studies were investigated to understand the influence of various parameters on the extraction behavior of palladium. They showed great extractability and selectivity for palladium than the other investigated metal ions, which showed negligible extraction values. On the other hand, the novel ligands could be a potential candidate for separation and recovery of palladium from spent catalyst dissolver (SSCD) solution.

Recent Publications

  1. Mowafy EA, Mohamed D(2016) Extraction and separation of gold(III) from hydrochloric acid solutions using long chain structurally tailored monoamides. Sep Puri Tech 167:146-153.
  2. Mowafy EA, Mohamed D, Alshammari A (2015) Extraction and separation of selected platinum-Group and base metalIons from nitric acid solutions using thiodiglycolamides (TDGA) as novel extractants. Sep Sci Tech 50:2352-2359.
  3. Mowafy EA, Mohamed D(2015) Extraction and separation of Nd(III), Sm(III), Dy(III), Fe(III), Ni(II), and Cs(I)from concentrated chloride solutions with N,N,N',N'-tetra(2-ethylhexyl)diglycolamide as new extractant. J Rare Earths 33:432-438.
  4. Mowafy EA, Mohamed D(2014)Extraction behavior of trivalent lanthanides from nitric acid medium by selected structurally related diglycolamides as novel extractants.Sep Puri Tech128: 18-24.
  5. Mohamed D, (2016) Evaluation of unsymmetrical dithiodiglycolamide as novel extractant for application in selective separation of palladium(II) from aqueous solutions.Russ J Appl Chem 89(8):1323-1328.
  6. Mohamed D, Alshammri A, Mowafy EA (2015) Liquid–liquid extraction of Certain trivalent lanthanides from nitrate solutions with N,N,N',N'-tetrabutylsuccinamide as new extractant.Radichem 57:602-609.
  7. Mohamed D, Mowafy EA (2016) Adsorption of selected hazardous metal ions from aqueous solutions using synthetic amorphous silico(IV)titanate as cation exchanger.Desal water treat.(acceptance for publication).