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为了探究两性阳离子复配修饰膨润土的解吸稳定性,采用阳离子型表面活性剂十六烷基三甲基溴化铵(CTMAB)对两性表面活性剂十二烷基二甲基甜菜碱(BS-12)修饰后的膨润土进行复配修饰,批处理法研究Na Cl溶液解吸下的土样稳定性,并对比温度、p H和盐溶液浓度对解吸的影响.结果表明:在相同BS-12修饰比例下,BS-CTMAB复配修饰膨润土的稳定性随CTMAB复配修饰比例的增加而减小;在相同CTMAB的修饰比例下,100%BS复配的土样相比50%BS稳定性更佳.解吸液p H和Na Cl溶液浓度的升高、温度的降低均促进土样稳定性增强;Na Cl溶液浓度、温度和p H值对BS-CTMAB复配修饰膨润土稳定性影响呈现为Na Cl溶液浓度最大,温度次之,p H值最小;100%BS+CT复配土样的解吸稳定性最好.
In order to explore the desorption stability of amphoteric cationic complex modified bentonite, cationic surfactant cetyltrimethylammonium bromide (CTMAB) was used to modify amphoteric surfactant dodecyl dimethyl betaine (BS-12 ) Modified bentonite was modified by batch method, and the stability of soil sample under desorption of NaCl solution was studied by batch method.The influence of temperature, p H and salt solution concentration on desorption was also studied.The results showed that under the same BS-12 modification ratio , The stability of BS-CTMAB composite modified bentonite decreased with the increase of the proportion of CTMAB complex modification. The stability of BS-CTMAB composite modified bentonite was better than that of 50% BS with the same CTMAB modification ratio. The concentrations of p H and Na Cl desorbed solution and the decrease of temperature all promoted the stability of soil samples. The effects of Na Cl concentration, temperature and p H value on the stability of BS-CTMAB modified bentonite were Na Cl solution The highest concentration, followed by the temperature, p H value of the smallest; 100% BS + CT complex soil sample desorption stability of the best.