Mohamad Jamil Arif, Mansor and Yeoh, Yuan Xin and Siti Nor Amira, Rosli and Noor Intan Shafinas, Muhammad and Kittappa, Shanmuga and Sumaiya, Zainal Abidin (2024) Process optimization of alumina extraction from aluminium dross via response surface methodology. Malaysian Journal of Chemistry, 26 (6). pp. 121-135. ISSN 1511-2292. (Published)
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Abstract
Despite its toxic nature, aluminium dross (AD), which is composed primarily of aluminium oxide, alloying elements, and salts such as sodium chloride (NaCl) or potassium chloride (KCl), may be repurposed into valuable applications. Various techniques including precipitation, leaching, sol-gel, and hydrothermal methods have been explored for alumina (Al2O3) extraction. However, there have been no specific studies reported on process optimization to date. Acid-leaching precipitation, a hydrometallurgical approach, was applied to treat and recover alumina from AD samples in the present study. Response surface methodology (RSM) with Design Expert® (DE) software was employed to optimize alumina production by investigating the interactions of parameters and varying the experimental conditions: temperature, acid concentration, and pH precipitation. X-ray fluorescence (XRF) analysis was used to determine the percentage of alumina recovery from the AD sample. RSM revealed that the acid concentration had a strong effect on alumina yield, while pH significantly influenced its purity. The optimal parameters for alumina extraction were 2.2 M acid concentration, leaching at 71.5 °C, and precipitation at pH 6.5, which gave a maximum yield of 42.17 % and a purity of 91.90 %.
| Item Type: | Article |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Alumina; aluminium dross; optimization; response surface methodology; waste valorization |
| Subjects: | T Technology > TP Chemical technology |
| Faculty/Division: | Institute of Postgraduate Studies Faculty of Chemical and Process Engineering Technology Centre for Research in Advanced Fluid & Processes (Fluid Centre) |
| Depositing User: | Miss Amelia Binti Hasan |
| Date Deposited: | 18 Feb 2025 08:05 |
| Last Modified: | 18 Feb 2025 08:05 |
| URI: | http://umpir.ump.edu.my/id/eprint/43851 |
| Download Statistic: | View Download Statistics |
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