改性高岭土处理含酸性媒介染料的印染废水

用十六烷基三甲基溴化铵(CTMAB)改性的高岭土处理以水溶性酸性媒介染料为主的印染废水.实验结果表明,当CTMAB-高岭土加入量为0.6 g/L、用石灰乳控制废水pH为9.5～10.0、聚丙烯酰胺的加入量为2.0 mg/L时,废水的处理效果最佳,废水色度和COD去除率分别达到98.0%和92.0%以上,出水色度和COD达到了GB4287-92<纺织染整工业水污染物排放标准>一级排放标准.

Treatment of Dyeing Wastewater Containing Acid Chrome Dye Using Modified Kaolin

The dyeing wastewater mainly containing water-soluble acid chrome dye was treated by using kaolin modified by cetyl trimethyl ammonium bromide (CTMAB). The experimental results show that when the CTMAB-kaolin dosage is 0.6 g/L, the wastewater pH is controlled at 9.5-10.0 with lime, and the PAM dosage is 2.0 mg/L, the best wastewater treatment effect is obtained. The removal rates of chroma and COD of the wastewater are 98.0% and 92.0%, respectively. The chroma and COD of the effluent can meet the first grade discharge standard of GB4287-92.