Liquid-liquid Extraction and Recovery of Pd(II) from Nitric Acid Medium Using Green Diesel as Extractant

A cost-effective method for the extraction of palladium (Pd) from HNO3 solution by green diesel as extractant in kerosene was investigated. Several parameters such as extractant, nitrate, hydrogen ion, nitric acid and metal ion concentrations, phase ratio, and thermodynamic parameters were studied....

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Bibliographic Details
Published in:Journal of physical science 2018-01, Vol.29 (2), p.25-48
Main Authors: Masry, Botros Abdelnaser, Mohammad Zeid, Mohammad, Kassem, Amany Taghian, Noweir, Hala Gamal, Ahmad Saad, Ebtissam, Messih Daoud, Jacqueline Abdel
Format: Article
Language:English
Subjects:
Benzene
Carbon tetrachloride
Chloride
Chloroform
Cyclohexane
Efficiency
Fourier transforms
Hydrocarbons
Hydrogen ions
Infrared analysis
Ions
Kerosene
Liquid-liquid extraction
Metals
Nitric acid
Palladium
Parameters
Phase ratio
Recovery
Sulfuric acid
Toluene
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Summary:A cost-effective method for the extraction of palladium (Pd) from HNO3 solution by green diesel as extractant in kerosene was investigated. Several parameters such as extractant, nitrate, hydrogen ion, nitric acid and metal ion concentrations, phase ratio, and thermodynamic parameters were studied. The extracted species were deduced using slope analysis method and infrared (IR) measurements. The results showed that the extraction efficiency of Pd(II) is 95% with 10% (v/v) diesel in kerosene, and 97% was recoveredfrom the loaded organic solution using 0.05 M thiourea or ammonium thiocyante solutions as stripping agents. The maximum loading capacity of diesel was found to be 2 x 102 moles of Pd(II) per mole extractant. The effect of diluents on the extraction of Pd(II) from nitric acid solution by green diesel indicated that, under the used experimental conditions, kerosene gave the highest extraction percent compared to cyclohexane, benzene, toluene, chloroform and carbon tetrachloride. Extraction of Pd(II) from different acidic media was also carried out and the extraction percent was found to decrease in the order: H2SO4 > HNO3 > HCl. The possibility of extraction and recovery of Pd from the sulphate leach solution of spent automotive catalyst was explored and a modified process is proposed and evaluated.
ISSN:1675-3402
2180-4230
DOI:10.21315/jps2018.29.2.3