羟基磷灰石改性及其吸附重金属离子研究进展

Research progress in hydroxyapatite modification and adsorption to heavy metal ions

羟基磷灰石(HA)作为一种具有良好重金属离子吸附和交换性的材料,在环境领域有着广泛的应用。但未经处理的HA存在吸附容量较小、吸附速率较慢等缺点,严重制约其应用。采用掺杂、表面改性、扩孔等方法对其表面进行处理,改变HA表面结构可以提高其对重金属离子的吸附性能。综述HA在重金属废水处理领域的研究进展,重点论述HA的制备方法、HA的改性技术及吸附机理,并对其在此领域未来的研究方向进行展望。

Hydroxyapatite(HA)is a material with excellent adsorption and exchange properties to heavy metal ions,which is widely used in environmental field. However,the disadvantages of low adsorption capacity and low adsorption rate for the untreated HA restrict its application. Doping,surface modification or broaching can change the surface structure of HA and improve the adsorption capacity to heavy metal ions. The research progress of hydroxyapatite in the treatment of the heavy metal waste water is reviewed. Preparation methods are discussed and several modification technologies and adsorption mechanism are introduced. In the end,the future research directions of HA in the removal of heavy metal ions is suggested.