A new ion exchange adsorption mechanism between carbonate groups and fluoride ions of basic aluminum carbonate nanospheres
A new ion exchange adsorption mechanism between carbonate groups and fluoride ions of basic aluminum carbonate nanospheres
复制标题
碱式碳酸铝纳米球碳酸盐基团与氟离子之间的离子交换吸附新机制
DOI：
10.1039/c4ra11018h
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发表时间：
2015-01-01
期刊：
影响因子：
3.9
通讯作者：
Song, Weiguo
中科院分区：
文献类型：
--
作者：
Wei, Fang;Cao, Changyan;Song, Weiguo
水中过量的氟化物严重影响人们的健康，通过吸附去除氟化物是非常有效和重要的。高吸附性能吸附剂的开发和吸附机理的研究是需要加强的两个方面。本文中，我们报道了具有丰富碳酸盐基团的碱式碳酸铝（记为Al(OH)CO3）纳米球在中性溶液中具有优异的除氟性能，最大吸附量为59 mg g - 1。特别是水中常见的Cl−、NO3−、PO43−、SiO32−和SO42−等阴离子对Al(OH)CO3对氟化物的吸附性能没有显著影响。基于x射线光电子能谱（XPS）和傅里叶变换红外光谱（FTIR）结果，提出了溶液中碳酸盐基团与氟离子交换的新机理。
Excessive fluoride in water has serious effect on people's health and removal of it through adsorption is very effective and important. Developing adsorbents with high adsorption capacities and elucidating the adsorption mechanisms are the two aspects needed to be enhanced. Herein, we reported that basic aluminum carbonate (denoted as Al(OH)CO3) nanospheres with an abundance of carbonate groups exhibited excellent properties for removal of fluoride with maximum adsorption capacity of 59 mg g−1 in neutral solution. In particular, other common anions in water, such as Cl−, NO3−, PO43−, SiO32− and SO42−, had no significant effects on the adsorption properties of Al(OH)CO3 for fluoride. Based on the X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) results, a new ion exchange mechanism involving carbonate groups and fluoride ions in solution was proposed.