高岭土对BS-12的吸附特征及影响因素的研究  

Studies on Adsorption Characteristics of BS-12 on Kaolinite and Its Affecting Factors

作　　者：赵盼盼[1] 孟昭福[1,2] 杨亚提[3] 杨淑英[3] 任爽[1] 吴琼[1] 李彬[3] 王建涛[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100 [2]农业部西北植物营养与农业环境重点实验室,陕西杨凌712100 [3]西北农林科技大学理学院,陕西杨凌712100

出　　处：《土壤通报》2015年第5期1226-1231,共6页Chinese Journal of Soil Science

基　　金：国家自然科学基金(No 41271244);陕西省社会发展攻关项目(No 2013K13-01-05);陕西省农业科技攻关项目(No 2012K02-15)资助

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。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.

关 键 词：十二烷基二甲基甜菜碱 高岭土 修饰 影响因素 

分 类 号：X53[环境科学与工程—环境工程]