Author/Authors :
Othman, Norasikin Universiti Teknologi Malaysia - Faculty of Chemical Engineering, Centre of Lipid Engineering and Applied Research (CLEAR) - Department of Chemical Engineering, Malaysia , Noah, Norul Fatiha Mohamed Universiti Teknologi Malaysia - Faculty of Chemical Engineering, Centre of Lipid Engineering and Applied Research (CLEAR) - Department of Chemical Engineering, Malaysia , Raja Sulaiman, Raja Norimie Universiti Teknologi Malaysia - Faculty of Chemical Engineering, Centre of Lipids Engineering and Applied Research (CLEAR) - Department of Chemical Engineering, Malaysia , Abdullah, Nurul Ashida Universiti Teknologi Malaysia - Centre of Lipid Engineering and Applied Research (CLEAR), Faculty of Chemical Engineering - Department of Chemical Engineering, Malaysia , Bachok, Siti Khadijah Universiti Teknologi Malaysia - Centre of Lipid Engineering and Applied Research (CLEAR), Faculty of Chemical Engineering - Department of Chemical Engineering, Malaysia
Abstract :
Nowadays, extraction and recovery of metals from industrial wastewater has become a major concern owing to the toxicity of heavy metals and economic value of precious metals such as gold, palladium and silver. In this research, the extraction of palladium from simulated aqueous solution using liquid-liquid extraction was studied. The organic phase containing bis(2,4,4-trimethylpentyl) monothiophosphinic acid (Cyanex 302) as a carrier was used. Several parameters such as concentration of carrier, type of diluents and stripping agent type and its concentration were investigated. The results showed that at the favourable condition of 0.1 mM Cyanex 302 in kerosene as a diluent, and 2.0 M of thiourea in 1.0 M sulphuric acid as a stripping agent, almost 100% of palladium was extracted from the liquid waste solution and 90% was recovered in the receiving phase.
Keywords :
Solvent extraction , phosphinic acid , palladium , extraction , wastewater
