Cationic polymer flocculant was synthesized using epichlorohydrin, diethanolamine and cross⁃linking agent hexamethylendiamine as materials. The effects of molar ratio, reaction time and temperature on decolorization rate of acid black dye were discussed. Meanwhile, the structure of polymer flocculant was char⁃acterized by FT- IR, and the flocculant was used for treatment of acid black dye flocculation. Under 100 mg/L of dye mass concentration, the effect of flocculant dosing amount, pH of dyeing wastewater and standing time on decoloration of dye were studied. The optimal decoloration process was determined: the dosage of flocculant was 350 mg/L, pH was control ed at 6~7, and maintaining the standing time for 25 min. The rate of decoloration could reach 95.1%. Compared with polyacrylamide and poly aluminium chloride flocculant on the market, under the same conditions, the decolorization rate and COD removal efficiency of cationic polymer floc⁃culant increased notably.%以环氧氯丙烷、二乙醇胺、己二胺(作为交联剂)为原料,制备高分子阳离子絮凝剂.研究了原料物质的量比、反应时间和反应温度对酸性黑染料脱色率的影响.利用红外光谱对絮凝剂聚合物的结构进行了表征分析,并将其应用于酸性黑染料絮凝处理.在染料质量浓度100 mg/L下,考察絮凝剂投加量、染液pH和静置时间对脱色效果的影响,确定了最佳脱色工艺：絮凝剂投加量为350 mg/L,染液废水pH为6~7,静置时间为25 min.在此条件下,脱色率达到95.1%.与市场上的聚丙烯酰胺和聚合氯化铝絮凝剂进行比较,在相同条件下,高分子阳离子絮凝剂的脱色率和COD去除率有显著的提高.
展开▼
