摘要
以酸化改性膨润土为载体,采用浸泡法制备了稀土La掺杂的La/酸化膨润土吸附剂。通过XRD和F T IR对其结构进行了表征,探讨了膨润土的改性机理,研究了该吸附剂对废水的除磷性能。结果表明:酸化过程洗掉了膨润土中的杂质和氧化铝,稀土镧的掺杂在膨润土层间及表面引入了一定数量的羟基化合物,改善了膨润土的层间结构并生成了新的La—O—Si键,实现了La与膨润土的复合,提高了膨润土的吸附性能。
La doping bentonite sorbent was prepared by immersion method, with acidation bentonite as the carrier. Through the XRD and FTIR,the structure and the mechanism of property modification were discussed,and also the adsorptive capability of the sorbent in removing phosphorus was investigated. The results show that the acidification process make the impurities and aluminum oxide in bentonite washed away, and La doping can lead the introduction of the surface hydroxyl groups into the interlayer or surface of bentonite. Then the composition of La with bentonite is realized and the interlayer structure of bentonite is improved because of the new formed La--O--Si bond. And then,the adsorption performance of the sorbent is increased.
出处
《光谱实验室》
CAS
2013年第5期2521-2524,共4页
Chinese Journal of Spectroscopy Laboratory
基金
西南石油大学第一届实验室中青年骨干人员培养计划
西南石油大学课外开放实验重点项目(KSZ1252)
关键词
膨润土
酸化
LA掺杂
表征
除磷
Bentonite
Acidize
La Doping
Characterization
Phosphorus Removal
