表面活性剂协同膨润土处理染料废水的研究

Integrative Disposal of Dye from Wastewater by Mixture of Surfactant and Bentonite

文章用两种阳离子表面活性剂溴化十六烷基三甲铵(CTMAB)、氯化十六烷基吡啶(CPC)与膨润土直接混合,协同处理模拟印染废水。研究了不同配比的CTMAB、CPC和膨润土混合物对靛红染料废水脱色的适宜条件,并与经过这两种表面活性剂改性的有机膨润土脱色效果作对比,初步分析了其作用机理。结果表明:表面活性剂(CTMAB和CPC)用量对脱色效果影响最大;表面活性剂协同膨润土体系的脱色效果明显优于其改性有机土,其中CTMAB混合膨润土体系效果最好,脱色率达99%以上;且表面活性剂混合膨润土体系的脱色效果受pH值和处理时间变化的影响较小,沉降速度快,表现出良好的吸附、脱色、絮凝沉降的协同效应。

Two kinds of surfactants, cetyltrimethyl ammonium bromide （CTMAB） and cetylpyridinium chloride （CPC） were mixed directly with bentonite to treat dye wastewater. The optimal conditions for proper proportions of CPC-bentonite and CTMAB-bentonite to treat isatin from wastewater were investigated contrastingly, and decolorization rates were compared with bentonite modified by these two cationic surfactants. Results indicated that the treatment of isatin by these two methods was greatly increased compared with traditional sorption method of organobentonite, and CTMAB-bentonite had the highest removal efficiency which could reach up to 99% for 100mg/L isatin. The process was less affected by the change of pH and contact time, and characterized by distinct synergistic effect of adsorption, flocculation and decolorization.