Murdoch Applied Nanotechnology Research Group, School of Engineering and Energy, Murdoch University, South Street Perth Western Australia, WA 6150, Australia.
J Hazard Mater. 2011 Jan 15;185(1):29-37. doi: 10.1016/j.jhazmat.2010.08.087. Epub 2010 Oct 7.
The absorption performance of a nano-structured hydroxyapatite produced from a combined ultrasonic and microwave technique was examined for the removal of fluoride from contaminated water. The effect of physical and chemical parameters such as initial pH, contact time, initial fluoride concentration and temperature were investigated. The results indicated that the equilibrium adsorption data followed both the Langmuir and Freundlich isotherms, with a maximum monolayer adsorption capacity of 5.5mg/g at 298K. In addition, the kinetic studies have shown that the fluoride adsorption data followed a pseudo-second order model and that the intra-particle diffusion process played a significant role in determining the rate. The thermodynamic analysis also established that the adsorption process was endothermic and spontaneous. The initial and final fluoride loaded nano-hydroxyapatite samples were characterized using FESEM, TEM, XRD, FTIR and XPS methods. The analysis revealed that structural changes to the adsorbent had taken place.
采用联合超声和微波技术制备的纳米结构羟基磷灰石对受污染水中的氟化物去除进行了吸附性能研究。考察了物理化学参数如初始 pH 值、接触时间、初始氟浓度和温度的影响。结果表明，平衡吸附数据同时遵循 Langmuir 和 Freundlich 等温线，在 298K 时最大单层吸附容量为 5.5mg/g。此外，动力学研究表明，氟化物吸附数据遵循拟二级动力学模型，内扩散过程在确定速率方面起着重要作用。热力学分析也表明，吸附过程是吸热和自发的。采用 FESEM、TEM、XRD、FTIR 和 XPS 方法对初始和最终负载氟的纳米羟基磷灰石样品进行了表征。分析表明，吸附剂发生了结构变化。
