Phosphorus removal from wastewater by ionic exchange using a surface-modified Al alloy filter

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• 作者：Young Ik Seo^a ; Ki Ho Hong^b ; Se Hoon Kim^c ; Duk Chang^d ; Kyu Hwan Lee^e ; Young Do Kim^c ; ^{ydkim1@hanyang.ac.kr}
• 关键词：Mesoporous film ; Aluminum hydroxide ; Alkali surface modification ; Phosphorus removal ; Ionic exchange
• 刊名：Journal of Industrial and Engineering Chemistry
• 出版年：2013
• 出版时间：25 May, 2013
• 年：2013
• 卷：19
• 期：3
• 页码：744-747
• 全文大小：693 K

文摘

In this study, a cost-effective and eco-friendly route for removal of phosphate in wastewater was demonstrated using an Al alloy foam filter with a mesoporous aluminum hydroxide (Al(OH₃) film. The mesoporous Al(OH)₃ film on which the ion exchange and adsorption of phosphate occur was generated using a simple alkali surface modification process. For higher phosphate removal by the surface-modified Al alloy foam filter, the number of filters was increased up to 20, which achieved 90 % phosphate removal within a very short contact time. As a recycling process, a second alkali surface modification was applied to the used filter after phosphate adsorption. It clearly indicated that the used filter can be recycled via a second alkali surface modification due to the ion exchange mechanism. It was shown that an alkali surface-modified Al alloy foam filter is a powerful candidate for phosphate removal in water treatment facilities.