Preparation and characterization of hydroxyapatite from Achatina achatina snail shells: effect of carbonate substitution and trace elements on defluoridation of water
Preparation and characterization of hydroxyapatite from Achatina achatina snail shells: effect of carbonate substitution and trace elements on defluoridation of water
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DOI：
10.1080/21870764.2018.1488570
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发表时间：
2018-01-01
影响因子：
2.3
通讯作者：
Dzikunu, Obed Korshie
中科院分区：
文献类型：
--
作者：
Asimeng, Bernard Owusu;Fianko, Joseph Richmond;Dzikunu, Obed Korshie
采用改进的化学沉淀法制备了一种新型的羟基磷灰石降氟材料[HAP：CA-10(PO4)(6)(OH)(2)]。X-射线衍射仪和原子吸收光谱分析表明，碳酸盐取代是搅拌条件的函数。通过改变搅拌时间来控制微晶尺寸和微量元素浓度。此外，红外光谱、循环伏安和离子交换谱分别证实了催化剂的官能团、表面质量浓度和除氟效率。观察到，最佳搅拌1小时后制备的样品在不影响水的总体pH条件的情况下降低了氟离子浓度，而在此时间段之后，随着pH条件的增加，氟离子的吸收率较低。还观察到微晶尺寸不影响样品的去除能力。结果表明，使用当地制备的AA贝壳进行水净化和其他环境修复应用是可行的。
A novel hydroxyapatite [HAp: Ca-10 (PO4)(6)(OH)(2)] material for defluoridation was prepared from Achatina achatina (AA) snail shells using a modified chemical precipitation method. X-ray diffractometry and atomic absorption spectrometry revealed carbonate substitution as a function of stirring conditions. Stirring time was varied to control crystallite size and trace element concentrations. In addition, Infrared spectra, cyclic voltammograms, and ion exchange profiles confirmed the functional groups, the surface mass concentration and the fluoride removal efficiency, respectively. It was observed that the samples prepared after 1hr optimal stirring times reduced fluoride concentration from without affecting the overall pH conditions of the water, whereas beyond this time frame, low uptake of the fluoride ions was obtained with increasing pH conditions. It was also observed that crystallite size did not affect the removal capacity of the samples. The results demonstrated herein the possibility of using locally prepared AA shells for water purification and other environmental remediation applications.