新型双功能螯合絮凝剂的制备与性能研究  

PREPARATION AND PERFORMANCE OF NEW TYPE CHELATING FLOCCULANT

作　　者：刘建[1] 张明祖[1] 覃路燕[1] 曾普[1] 韩涛[1] 

机构地区：[1]长安大学环境科学与工程学院化学工程系,陕西西安710054

出　　处：《水处理技术》2008年第7期33-35,42,共4页Technology of Water Treatment

摘　　要：本文研究了以聚丙烯酰胺,甲醛,三乙烯四胺为原料,按照曼尼奇反应机理制备胺化接枝型双功能螯合絮凝剂及其性能研究。由于在聚丙烯酰胺的分子长链上引入了具有螯合作用的N原子,使得所得产物既具有捕捉金属离子的螯和作用又具有絮凝作用,因此处理含重金属离子的废水能力增强。以对重金属离子汞的去除率为考核指标选择最佳反应条件,考察了温度、聚合体系的pH值、反应时间、反应物料比对产物性能的影响。确定了适宜的反应条件为:反应温度35℃,聚合体系pH值为9,反应时间3.5h,物料比(摩尔比)为聚丙烯酰胺∶甲醛∶三乙烯四胺=1∶0.54∶0.34。用所得絮凝剂分别处理含重金属离子汞、铜的高岭土悬浮液模拟废水,处理后的水能够达到国家允许的排放标准。The double function chelating ligand cation PAM for treating mineral dressing wastewater was prepared from polyacrylate, formaldehyde solution and triethyleneteraamine according to Mannich-Reaction. The product has the chelate effect and flocculants effect after functional group with N was grafted to the PAM chain. Its ability of treating wastewater was improved. The percentage removal of mercury was chosen as the qualities index to ensure the fittest reaction condition. The influence of temperature, the pH of the polymer system, the contact time and the stock ration on the flocculating performance were studied. It was showed that the best reaction temperature, pH value, contact time, stock ration were 35℃, 9, 3.5 h and 1：0.54：0.34 respectively. Flocculant was used for the treatment of wastewater contained heavy metal ion, copper and mercury ,the treated water could meet the state permitted emission standards.

关 键 词：聚丙烯酰胺 絮凝剂 絮凝机理 

分 类 号：TQ314.253[化学工程—高聚物工业]