A biocompatible and novelly-defined Al-HAP adsorption membrane for highly effective removal of fluoride from drinking water

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• 作者：Junyong He^a ; ^b ; Kai Chen^a ; ^b ; Xingguo Cai^a ; ^b ; Yulian Li^a ; ^b ; Chengming Wang^b ; Kaisheng Zhang^a ; ^b ; Zhen Jin^a ; Fanli Meng^a ; Xuguang Wang^c ; Lingtao Kong^a ; ^{ltkong@iim.ac.cn} ; Jinhuai Liu^a ; ^{jhliu@iim.ac.cn}
• 关键词：Fluoride ; Al-HAP nanowires ; Modified ; Adsorption ; Membrane
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：490
• 期：Complete
• 页码：97-107
• 全文大小：3468 K
• 卷排序：490

文摘

A biocompatible and novelly-defined adsorption membrane for rapid removal of fluoride was prepared. Both adsorption and membrane techniques were used in this research. Al(OH)3 nanoparticles modified hydroxyapatite (Al-HAP) nanowires were developed and made into Al-HAP membrane. The adsorption data of Al-HAP adsorbent could be well described by Freundlich isotherm model while the adsorption kinetic followed pseudo-second-order model. The maximum of adsorption capacity was 93.84 mg/g when the fluoride concentration was 200 mg/L. The adsorption mechanism was anion exchanges and electrostatic interactions. The contribution rates of HAP nanowires and Al(OH)3 nanoparticles in fluoride removal were 36.70% and 63.30%, respectively. The fixed-bed column test demonstrate that the Al-HAP was biocompatible and in a good stability during the process of water treatment. The fluoride removal abilities of Al-HAP membrane with 0.3 mm thickness could reach 1568 L/m2 when fluoride concentrations were 5 mg/L. This study indicated that the Al-HAP membrane could be developed into a very viable technology for highly effective removal of fluoride from drinking water.