蒙脱石基絮凝剂处理染料废水

Treatment of Dyeing Wastewater Using Montmorillonite-based Flocculant

采用先酸活化蒙脱石、再加碱聚合的方法制备了蒙脱石基絮凝剂(PMT),用于去除染料废水的TOC和色度。实验结果表明:PMT处理2BLN分散蓝、KNR活性艳兰、X-3B活性艳红模拟染料废水的最佳加入量分别为0.30,0.30,0.25 g/L。在此最佳条件下,2BLN分散蓝、KNR活性艳兰和X-3B活性艳红模拟染料废水的TOC去除率分别为77.0%,89.2%,39.5%,脱色率分别为41.2%,43.1%,57.4%。PMT对KNR活性艳兰和2BLN分散蓝实际染料废水的TOC去除率高于聚合氯化铝(PAC)和聚合硫酸铁(PFS),分别为91.6%和88.4%。但PMT对X-3B活性艳红实际染料废水的TOC去除率及对3种实际废水的脱色率均低于PAC和PFS。

Montmorillonite was activated by acid and then polymerized with alkali to prepare poly- montmorillonite-based flocculant （PMT）, and was used for removal of TOC and chroma in dyeing wastewater. The experimental results show that： Under the optimum conditions of PMT dosages 0.30 g/L for 2BLN, 0.30 g/L for KNR and 0.25 g/L for X-3B, the TOC removal rates of the 3 kinds of simulated dyeing wastewater are 77.0%, 89.2%, 39.5%, the chroma removal rates are 41.2%, 43.1%, 57.4%, respectively. The TOC removal rates of KNR and 2BLN actual wastewater by PMT are 91.6% and 88.4%, which are higher than those by PAC and PFS, whereas the TOC removal rate of X-3B actual wastewater and the chroma removal rates of the 3 kinds of actual dyeing wastewater by PMT are all lower than those by PAC and PFS.