【摘要】 采用两性表面活性剂十二烷基二甲基甜菜碱(BS-12)对高岭土进行修饰,以批处理法研究了在不同温度、p H和离子强度条件下,高岭土对BS-12的吸附特征。结果表明,高岭土对BS-12的吸附符合Henry方程。温度的升高不利于高岭土对BS-12的吸附;总体上p H对BS-12的吸附影响不大;离子强度增加,吸附量下降。通过X射线衍射(XRD)和总有机碳(TOC)分析表明,50BS、100BS、150BS高岭的XRD图谱没有明显变化,BS-12修饰高岭土的有机碳含量随修饰比例的增加而增加,BS-12的吸附率在53.5%~64.1%之间,BS-12主要以静电引力方式吸附在高岭土表面。更多还原

【Abstract】 This research modified kao linite with dodecyl dimethyl betaine(BS- 12), and then investigated the adsorption characteristics of BS- 12 on kaolinite at different conditions of ionic strength, temperature and p H by batch processing. Results showed that Henry equation was suitable to describe the adsorption of BS- 12 on kaolinite. The adsorption of BS- 12 on kaolinite was not generally sensitive to p H, and the adsorption amount decreased with the rise of ionic strength. X- ray diffraction(XRD) spectra had no significant variation in 50 BS, 100 BS and 150 BS kaolinite.Organic carbon contents in kaolinite modified with BS- 12 increased with the rise of modified proportion. The adsorption rate was in the range of 53.5% ~ 64.1%, and BS- 12 was mainly adsorbed on kaolinite surface by the way of static electricity.更多还原