有机膨润土对对硝基苯酚吸附性能的研究

以溴化十六烷基三甲铵(CTMAB)和溴化十六烷基吡啶(CPB)两种表面活性剂对钠基膨润土进行有机改性,研究了改性后的有机膨润土的用量、介质pH值、作用时间、溶液中对硝基苯酚的浓度等因素对膨润土去除对硝基苯酚的影响.结果表明:同一浓度条件下,CTMAB-有机膨润土对对硝基苯酚的去除率和吸附量均比CPB-有机膨润土高;当对硝基苯酚溶液pH在2-10范围内,2种有机膨润土对对硝基苯酚的吸附性能变化不大,但当pH上升到12时,2种有机膨润土对对硝基苯酚去除率分别下降20.5%和36.2%.2种有机膨润土对对硝基苯酚的吸附可用Freundlich方程加以描述.

Study on the Absorption Properties of Organobentonite to P-nitrophenol

Two organobentonites are synthesized by inserting cetyltrimethylammonium bromide(CTMAB) and cetylpyridinium bromide(CPB) into the interlayer of bentonite mineral.The absorption properties of organobentonites to p-nitrophenol are examined under different conditions,such as the amount of appended organobentonite,shaking duration,pH value,and the concentration of p-nitrophenol in water.The results show that the removal rate and absorption of cetyltrimethylammonium bromide to p-nitrophenol is stronger than that of cetylpyridinium bromide;the absorption capacities of two organobentonites to p-nitrophenol varies little when pH value of p-nitrophenol ranges from 2 to 10,but the removal rate of two organobentonites respectively decreases by 20.5% and 36.2% at pH12.The absorption of two opganobentonites to p-nitrophenol can be described by Freundich isotherms absorption model.