胺接枝絮凝剂的制备及螯合铁性能的研究  

Study on preparation of chelating flocculant and chelating iron

作　　者：杨诺[1] 刘建[1] 

机构地区：[1]长安大学环境科学与工程学院,陕西西安710054

出　　处：《应用化工》2010年第12期1802-1806,共5页Applied Chemical Industry

基　　金：国家自然科学基金资助项目(50679003)

摘　　要：以EDTA可以螯合铁离子为研究思路,在Mannich反应机理的基础上,以聚丙烯酰胺(PAM)、甲醛、亚氨基二乙酸(IDA)为原料,制备了部分胺化接枝型絮凝剂,并对其螯合铁性能进行了研究。通过大量实验考察了絮凝剂合成的最佳条件和螯合铁的最佳条件。在pH9～10,反应物配比PAM∶甲醛∶亚氨基二乙酸=1∶1.1∶0.7,50℃反应3 h合成的絮凝剂接枝率最高,絮凝效果可达92%;用该絮凝剂处理325 g/L的模拟含铁废水,结果表明该絮凝剂具有螯合铁的能力,为除铁研究提供了新的思路和方法。According to the idea that EDTA can chelate iron and basing on the Mannich reaction mechanism,polyacrylamide（PAM）,formaldehyde,iminodiacetic acid（IDA） were used to prepare a kind of chelating flocculant which grafted with iminodiacetic acid（IDA）.As well as,this flocculant chelating iron properties were studied.A lot of experiments indicated that the best conditions for synthesizing flocculant were：pH 9 ～ 10,ratio of reactants PAM ∶formaldehyde ∶iminodiacetic acid 1 ∶1.1 ∶0.7,temperature 50 ℃,time 3 h and the flocculant ability was up to 92%.Using this flocculant to treat wastewater with 325 g/L iron,results show that the flocculant has the ability of chelating iron,which provides new idea and method for the iron removal study.

关 键 词：絮凝剂 接枝 螯合 含铁废水 

分 类 号：TU991.2[建筑科学—市政工程]