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Synergistic Extraction of Gold by Di-(2-ethylhexyl)phosphoric Acid - Isodecanol

[ Vol. 12 , Issue. 1 ]

Author(s):

Mohd Jumain Jalil*, Nurul Afwanisa, Intan Suhada and Noor Hidayu Abdul Rani   Pages 54 - 60 ( 7 )

Abstract:


Objective and Background: Synergistic extraction was introduced to replace single extraction due to enhanced extraction efficiency of heavy metal.

Methodology: In order to improve extraction efficiency, di-(2-ethylhexyl) phosphoric acid (D2EHPA) was mixed with isodecanol to provide a synergistic effect together with leaching solution which is thiourea. From the single extraction system, the optimum temperature is found at 30°C producing the highest yield of %E of 91.30%. The single extraction also happened better with the presence of Fe(III) solution and thiourea as the %E is at 91.23%.

Results and Conclusion: It was found that the synergistic D2EHPA-isodecanol extraction is successful as it yields higher %E than the single D2EHPA extraction.

Keywords:

Synergistic extraction, D2EHPA, isodecanol, Au(III), temperature, phosphoric acid.

Affiliation:

Faculty of Chemical Engineering, Universiti Teknologi MARA Cawangan Pulau Pinang, 13500 Permatang Pauh, Pulau Pinang, Faculty of Chemical Engineering, Universiti Teknologi MARA Cawangan Pulau Pinang, 13500 Permatang Pauh, Pulau Pinang, Faculty of Chemical Engineering, Universiti Teknologi MARA Cawangan Pulau Pinang, 13500 Permatang Pauh, Pulau Pinang, Faculty of Chemical Engineering, Universiti Teknologi MARA Cawangan Pulau Pinang, 13500 Permatang Pauh, Pulau Pinang

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