Kumar, Vinay and Kumar, Manoj and Jha, Manis K and Jeong, Jinki and Lee, Jae-chun (2009) Solvent extraction of cadmium from sulfate solution with di-(2-ethylhexyl) phosphoric acid diluted in kerosene. Hydrometallurgy, 96 (3). pp. 230-234.
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In the present paper, solvent extraction process has been used for extraction of cadmium from sulfate solution using di-(2-ethylhexyl) phosphoric acid (D2EHPA) with 1% isodecanol in kerosene diluent expected from industrial effluents or leaching of ores/secondary materials. Different process parameters such as pH, contact time, extractant concentration, O/A ratio etc. were investigated. Results demonstrated that quantitative extraction of cadmium was feasible from 4.45 mM cadmium feed solution in single stage at equilibrium pH 4.5, time 2 min and O/A ratio 1:1 with 0.15 mM D2EHPA. The extraction mechanism of cadmium from sulfate solution by D2EHPA in kerosene could be represented at equilibrium by Cd2+ + 3/2 (H2A2)org CdA2(HA)org + 2H+. The loading capacity of 0.15 mM D2EHPA in sulfate solution was determined to be 8.9 mM cadmium. The loaded cadmium was effectively stripped using 180 g/L sulfuric acid. The metal or salt could be produced by electrolysis or crystallization from the stripped solution.
|Uncontrolled Keywords:||Solvent extraction; Cadmium; D2EHPA; Sulfate solution|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||INVALID USER|
|Deposited On:||15 Oct 2009 12:16|
|Last Modified:||03 Jan 2012 12:50|
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