BS-CTMAB复配修饰膨润土的稳定性

发布时间：2018-10-30 14:16

【摘要】：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.
[Abstract]:In order to study the desorption stability of amphoteric cation modified bentonite, The amphoteric surfactant dodecyl dimethyl betaine (BS-12) modified bentonite was modified by cetyltrimethylammonium bromide (CTMAB), a cationic surfactant. The stability of soil samples desorbed by Na Cl solution was studied by batch treatment, and the effects of temperature, p H and salt concentration on desorption were compared. The results showed that the stability of BS-CTMAB modified bentonite decreased with the increase of CTMAB modified ratio, and the stability of 100%BS modified bentonite was better than that of 50%BS under the same CTMAB modification ratio. The increase of pH and Na Cl solution concentration and the decrease of temperature promoted the stability of soil samples. The effects of Na Cl concentration, temperature and pH value on the stability of BS-CTMAB modified bentonite were as follows: the concentration of Na Cl solution was the largest, followed by the, p H value, and the desorption stability of 100%BS CT composite soil was the best.
【作者单位】：西北农林科技大学资源环境学院;农业部西北植物营养与农业环境重点实验室;新疆工程学院化学与环境工程系;
【基金】：国家自然科学基金(No.41271244) 陕西省重点研发计划(No.2017SF-385)~~
【分类号】：X53

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