CTAB-膨润土的制备、表征及对橙黄II的吸附研究  

PREPARATION, CHARACTERIZATION AND ADSORBABILITY FOR ORANGE II OF CTAB MODIFIED BENTONITE

作　　者：李海健[1] 李文兵[1] 万栋[1] 王光华[1] 陈坤[1] 胡琴[1] 

机构地区：[1]武汉科技大学化学工程与技术学院,湖北武汉430081

出　　处：《水处理技术》2014年第9期74-77,共4页Technology of Water Treatment

基　　金：国家级大学生创新创业训练计划项目(201210488004);湖北省教育厅科学技术研究计划重点项目(D20131107);高等学校博士学科点专项科研基金联合资助项目(20114219110002)

摘　　要：为了提高膨润土的对橙黄II的吸附性能,使用十六烷基三甲基溴化铵(CTAB)为改性剂,通过简单的离子交换方法制备出了不同CTAB含量的改性膨润土。采用傅里叶变换红外光谱、X射线衍射、扫描电子显微镜和比表面孔隙分析对样品进行表征,研究了CTAB改性膨润土对橙黄II的吸附性能。结果表明,经过CTAB改性后,膨润土对橙黄II的吸附容量明显增大,当CTAB的质量分数为30%时吸附容量达到最大,其对橙黄II的吸附遵循拟2级反应动力学及Langmuir吸附模型,最大吸附容量为150.5 mg/g左右。Surfactant modified bentonite with different amount of cetyltrimethylammonium bromide （CTAB） was prepared by a simple ion exchange method, and the organification of bentonite was proved by Fourier transform infrared （FTIR） spectroscopy, X-ray diffraction （XRD）, scanning electron microscope （SEM）. The adsorption of Orange Ⅱ（OⅡ） dye onto CTAB modified bentonite was carried out. Compared with natural bentonite, the adsorption capacity of CTAB-Bent for OII was greatly enhanced, and 30% CTAB-Bent possesses the highest adsorption capacity. The adsorption kinetic of OⅡ on CTAB-Bent could be best described by the pseudo-second-order model and the adsorption isotherm of OII was in good agreement with the Langmuir equation. The maximum adsorption capacity （qm） for the adsorption of OII by 30% CTAB-Bent was 150.5 mg/g.

关 键 词：嘭润土 CTAB 橙黄Ⅱ 吸附 

分 类 号：X703.1[环境科学与工程—环境工程]