Extraction and Characterization of γ-Alumina from Waste Aluminium Dross
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- 作者：Lai Fok How ; Aminul Islam ; Mohd Saleh Jaafar…
- 关键词：Aluminium dross ; γ ; Al2O3 ; Precipitation ; Leaching
- 刊名：Waste and Biomass Valorization
- 出版年：2017
- 出版时间：March 2017
- 年：2017
- 卷：8
- 期：2
- 页码：321-327
- 全文大小：
- 刊物类别：Engineering
- 刊物主题：Engineering, general; Environment, general; Renewable and Green Energy; Industrial Pollution Prevention; Waste Management/Waste Technology; Environmental Engineering/Biotechnology;
- 出版者：Springer Netherlands
- ISSN：1877-265X
- 卷排序：8
文摘
Aluminium (Al) dross, a chemical waste from an aluminium production factory in Malaysia, was used in this study for the recovery of aluminium in the form of γ-Al2O3. The different methods, such as acid leaching, alkaline precipitation at different pH and calcination steps were successfully applied to extract the γ-Al2O3 from Al dross. The products were characterized by X-ray diffraction, atomic absorption spectroscopy, X-ray fluorescence, thermogravimetric analysis, Brunauer–Emmett–Teller surface area analysis, particle size distribution and field emission scanning electron microscope. The results revealed that the γ-Al2O3 powders recovered from the Al dross has crystallite size around 5 nm, specific surface area between 111 and 128 m2/gwith different pore sizes. Thus, the present study illustrates an adequate utilization of the Al dross, which is, to date, neither adequately utilized nor properly dispensed in most of the developing countries.