Screening of factors influencing Cu(II) extraction by soybean oil-based organic solvents using fractional factorial design |
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Authors: | Chang Siu Hua Teng Tjoon Tow Ismail Norli |
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Affiliation: | Faculty of Chemical Engineering, Universiti Teknologi MARA Malaysia, 13500 Permatang Pauh, Penang, Malaysia. |
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Abstract: | This study aimed to identify the significant factors that give large effects on the efficiency of Cu(II) extraction from aqueous solutions by soybean oil-based organic solvents using fractional factorial design. Six factors (mixing time (t), di-2-ethylhexylphosphoric acid concentration ([D2EHPA]), organic to aqueous phase ratio (O:A), sodium sulfate concentration ([Na(2)SO(4)]), equilibrium pH (pH(eq)) and tributylphosphate concentration ([TBP])) affecting the percentage extraction (%E) of Cu(II) were investigated. A 2(6-1) fractional factorial design was applied and the results were analyzed statistically. The results show that only [D2EHPA], pH(eq) and their second-order interaction ([D2EHPA] × pH(eq)) influenced the %E significantly. Regression models for %E were developed and the adequacy of the reduced model was examined. The results of this study indicate that fractional factorial design is a useful tool for screening a large number of variables and reducing the number of experiments. |
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Keywords: | Cu(II) Soybean oil-based organic solvents Screening Fractional factorial design Percentage extraction (%E) |
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