城市废弃物填埋场中有机膨润土的防渗研究

用十六烷基三甲基溴化铵 (HDTMA)为改性剂对膨润土进行改性。主要研究了改性剂最佳用量、pH值等因素的影响 ,以及有机膨润土作为高度反应性防渗层材料的有效性和可行性。实验结果表明 ,改性剂的最佳浓度为 5 % ;pH值和振荡时间对有机膨润土的吸附效果有重要影响 ;改性后有机膨润土平衡吸附容量约为未改性膨润土的 4倍 ;改性后有机膨润土吸附有机污染物的能力大大提高

STUDY ON THE APPLICATION OF ORGANIC BENTONITE IN LINER OF LANDFILL

HDTMA was used as surfactant to modify the bentonite.In the experiment the optimal concentration of denaturant and other influencing factors such as pH value were investigated.Furthermore,the availability and feasibility of the organic bentonite as a high reactivity liner material were researched.The results show that the optimal denaturant concentration is 5%;pH value and vibrating time have significant impact on the sorption effect of the organic bentonite; the saturated-sorption capacitance of organic bentonite is four times than that of bentonite; the organic bentonite has high sorption capability of organic pollutant than the bentonite.