1. A biocompatible and novelly-defined Al-HAP adsorption membrane for highly effective removal of fluoride from drinking water.
- Author
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He J, Chen K, Cai X, Li Y, Wang C, Zhang K, Jin Z, Meng F, Wang X, Kong L, and Liu J
- Subjects
- Adsorption, Nanoparticles chemistry, Nanoparticles ultrastructure, Nanowires chemistry, Nanowires ultrastructure, Aluminum Hydroxide chemistry, Drinking Water analysis, Durapatite chemistry, Fluorides isolation & purification, Membranes, Artificial, Water Pollutants, Chemical isolation & purification, Water Purification methods
- Abstract
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 93.84mg/g when the fluoride concentration was 200mg/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 0.3mm thickness could reach 1568L/m2 when fluoride concentrations were 5mg/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., (Copyright © 2016 Elsevier Inc. All rights reserved.)- Published
- 2017
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