两种两性高分子絮凝剂处理印染废水的研究

摘要

采用水溶液聚合方法制备两种两性高分子絮凝剂 p ( DMDAAC-co-FA )和 p ( DMC-co-DMAEMA-co-AMPS)。对两种共聚合产物进行了傅里叶红外光谱( FT-IR)结构表征。用两种絮凝剂对印染废水进行絮凝试验的结果显示,絮凝剂p( DMDAAC-co-FA)在pH~7、投加量120 mg·L-1时,CODCr去除率79．2%,色度去除率95．0%；絮凝剂p( DMC-co-DMAEMA-co-AMPS)在pH~7、投加量140 mg·L-1时,CODCr去除率75．3%,色度去除率92．0%。通过对絮凝试验的絮体进行电镜扫描分析,采用非线性数学分形理论盒子法计算絮体形貌的空隙分维数Df ,结果表明,絮体形貌的空隙分维数理论计算值与试验结果相符。%Two novel flocculants,p( DMDAAC-co-FA) and p( DMC-co-DMAEMA-co-AMPS) were synthesized in aqueous solution. The products were characterized with FT-IR. The results of flocculation experiments showed that the removal ratio of CODcr and chroma were 79. 2%and 95. 0%at pH=7 with a dosage of 120 mg·L-1 p( DMDAAC-co-FA. In addition,the removal ratio of CODcr and chroma were 75. 3%and 92. 0%at pH=7 with a dosage of 140 mg·L-1p(DMC-co-DMAEMA-co-AMPS). The fractal dimension was computed on analyzing dyeing wastewater flocs SEM and using sand box method of Non-liner fractinal theory,and the results of flocculation showed that the experimental results were consistent with the theorical computation.