活性白土的改性及其对苯酚废水的吸附研究  

Preparation of Modified Bentonite and Its Adsorption for Phenol

作　　者：王珊珊[1] 马红竹[1] 王静[1] 余婕[1] 

机构地区：[1]陕西师范大学化学化工学院,西安710119

出　　处：《硅酸盐通报》2015年第1期84-89,共6页Bulletin of the Chinese Ceramic Society

基　　金：中央高校基本科研业务费专项资金资助项目(GK201302013)

摘　　要：以氧化钙(CaO)、十六烷基三甲基溴化铵(CTAB)为改性剂,对活性白土进行改性,制得吸附剂CTAB/CaBent。利用傅里叶变换红外光谱仪(FTIR)和X射线衍射仪(XRD)对其进行结构表征。结果表明改性后d001值增大,说明改性分子进入活性白土层间。以苯酚水溶液为模拟废水,考察了改性活性白土对苯酚的吸附特性,并对其进行实验条件的优化和动力学拟合。实验结果表明:当苯酚浓度为100mg/L,吸附剂用量为30g/L,吸附温度为298K,接触时间为30min,不调节pH值时,苯酚的去除率可以达到78.13%,吸附过程符合准二级动力学。A novel adsorbent CTAB / Ca-Bent was prepared by modifying bentonite with cetyltrimethylammonium bromide and calcium oxide. The adsorbent was characterized by Fourier transform infrared（ FT-IR） and X-ray powder diffraction（ XRD）. The results showed that d001 values increased after modification,indicating CTAB intercalated into activated clay successfully. The adsorption of phenol by CTAB / Ca-Bent and the kinetics were studied. It can be found that over 78. 13% phenol removal was observed under following conditions： the initial concentration of phenol 100 mg / L,adsorbent dosage 30 g / L,temperature 298 K,contact time 30 min,and original p H（ about 7）,and pseudosecond-order kinetic model fit better to describe phenol adsorption.

关 键 词：活性白土 表征 吸附 苯酚 

分 类 号：TQ028[化学工程]