废水中阴离子表面活性剂的最优化处理工艺

Studies on the Treatment of Wastewater Containing Anion Surfactants with OFR Technique

应用氧化絮凝复合床降解废水中的阴离子表面活性剂 ,系统地研究了各种主要的物理化学因素 ;催化剂种类、填料颗粒粒度、槽电压、电极间距离、压缩空气流量、试样的浓度、酸度、电导率和处理时间等对阴离子表面活性剂去除效果的影响 ,找到了相关的影响规律 ,确定了最佳的物理化学条件。实验结果表明 ,阴离子表面活性剂的去除率在 95 %以上 。

In this paper,a new method for the treatment of wastewater containing anion surfactants by electrogenerated hydroxyl radical(·OH)in the OFR has been established.Anion surfactants for dodecylbenzene sulphonic acid sodium(DBS) and dodecyl sulphonic acid sodium(DDS) are selected as model pollutants to study their removal rate and the degradation mechanism in the OFR.The main physico chemical factors affecting the removal rate were investigated,such as type of catalyst,filler size,cell voltage,interelectrode distance,air flow,treating time,the concentration,pH and conductivity of testing solution etc.The optimal conditions have been found out with the removal rate of DBS and DDS above 95%.Residual concentrations of the effluent correspond to GB8978-1996 for national new standard.