Synthesis of Nano-sized Boehmites for Optimum Phosphate Sorption
| Autor: | Junzo Tanaka, Keisuke Fukushi, Hirohisa Yamada, Yujiro Watanabe, Yu Komatsu, Toshiyuki Ikoma, Takeshi Kasama, Yusuke Moriyoshi |
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| Rok vydání: | 2011 |
| Předmět: |
Reaction mechanism
Boehmite Ion exchange Process Chemistry and Technology General Chemical Engineering Inorganic chemistry Filtration and Separation Sorption General Chemistry Phosphate complex mixtures chemistry.chemical_compound Crystallinity chemistry Chemical engineering Hydroxide Phosphoric acid |
| Zdroj: | Separation Science and Technology. 46:818-824 |
| ISSN: | 1520-5754 0149-6395 |
| Popis: | Nano-sized boehmites with different crystallinity were synthesized at the temperature range of 25 to 200°C in order to produce phosphate absorbents with high capacity. The physicochemical property of boehmites was depended on the synthesis temperature: the particle size was increased and the surface area showed the maximum for the boehmite at 50°C. The phosphate sorptions into boehmites were analyzed at room temperature in the phosphoric acid solutions as a model of wastewater at the concentration of 0.1 to 3.0 mmol l−1 and the pH of 3 to 7. The boehmite synthesized at 50°C exhibited the highest amount of phosphate sorption (1.73 mmol g−1 at pH 3.3) compared with Al-bearing materials. The reaction mechanism during phosphate sorption was described by the anion exchange reaction between phosphate ions in sodium phosphate solution and hydroxide ions on boehmite surfaces. Therefore, the variation in the amount of phosphate sorption on the different boehmite samples depends strongly on the surface area in the ... |
| Databáze: | OpenAIRE |
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