CPC协同膨润土处理模拟双酚A废水的研究

Integrative Disposal of Bisphenol A from Simulated Wastewater by Mixture of Surfactant CPC and Bentonite

为了提高双酚A废水的处理效率,采用有机膨润土的制备和模拟废水处理同时进行的方法,即将阳离子表面活性剂(氯代十六烷基吡啶-CPC)和膨润土直接混合,协同处理模拟双酚A废水。通过吸附实验研究了CPC投加量、反应时间、p H值等因素对双酚A去除率的影响;采用等温吸附和动力学方程分析协同吸附过程。实验表明:CPC的加入提高了膨润土对双酚A的吸附量,当CPC投加量为600 mg/L时,膨润土对双酚A的最大吸附量达到38.3 mg/g;协同作用使膨润土吸附双酚A的平衡时间变短,吸附速率提高,10 min基本达到平衡吸附;协同作用随p H值的升高而加强,碱性条件有利于双酚A的吸附。研究表明:CPC和膨润土的协同作用,不仅提高了双酚A的吸附量,而且避免有机膨润土制备过程,提高了废水处理的效率。

The preparation of organic bentonite and simulated wastewater treatment were carried out simuhaneously, in order to improve the removal efficiency of bisphenol A. The cationic surfactant （ chlorinated hexadecylpyridinium-CPC） and bentonite were directly mixed to make an integrative disposal of bisphenol A simulation wastewater. The effects of CPC addition dosage, reaction time, and pH value on the adsorption of bisphenol A by bentonite were investigated using adsorption experiments. The integrative adsorption process was analyzed by isotherm adsorption and kinetic equation. The experiment indicated that bisphenol A adsorption capacity of bentonite increased with the increase of CPC dosage, and the maximum adsorption capacity reached 38.3 mg/g when CPC addition dosage was 600 mg/L. In addition, the integrative effect made the equilibrium time of bisphenol A adsorption by bentonite shorten and the adsorption rate improve, and it could reach adsorption equilibrium within 10 minutes. Moreover, the integrative effect increased with the increase of pH value, and alkaline condition was advantageous to the adsorption of bisphenol A. The research indicates that adding cationic surfactant into the process of bisphenol A adsorption simultaneously, not only can improve adsorption capacity of bisphenol A by bentonite and avoid complex process of organic-bentonite synthesis, but also enhance the disposal efficiency of wastewater.