阳离子絮凝剂P(AM-DMC)的合成及其对活性染料废水的絮凝脱色  

Synthesis of Cationic Flocculant P(AM-DMC)and Its Decolorizing Property on Reactive Dye Wastewater

作　　者：沈俊菊[1] 庄源益[1] 张稚妍[1] 

机构地区：[1]南开大学环境科学与工程学院

出　　处：《化工环保》2005年第6期480-484,共5页Environmental Protection of Chemical Industry

摘　　要：以K2S2O8-脲为引发剂,通过自由基聚合法合成了丙烯酰胺-2-甲基丙烯酰氧乙基三甲基氯化铵P(AM-DMC)絮凝剂,并研究了其对4种活性染料模拟废水的脱色效果,考察了P(AM-DMC)加入量、阳离子度、特性粘数、染料溶液pH等因素对脱色效果的影响。实验结果表明:最佳P(AM-DMC)加入量随染料分子中磺酸基数目的增加而增加,随絮凝剂阳离子度的增大而减少;阳离子度大于52%时,最高脱色率基本相同;特性粘数对脱色效果影响很小;在染料溶液为弱酸性及中性条件下,P(AM-DMC)的脱色效果较好。P(AM-DMC)对活性染料废水的脱色机理是,P(AM-DMC)中的—N+(CH3)3与染料分子中的—SO3-结合,生成—N+(CH3)3SO3-—,同时也形成了分子间氢键,通过键合作用使染料分子聚集沉降。Poly { acrylamide - co - [ 2 - （ methacryloxyethyl ） trimethylammonium chloride ] } , which is called flocculant P（AM- DMC）, was synthesized by radical copolymerization using K2S2O8 -urea as initiator. Its decolorization efficiencies on 4 kinds of simulated reactive dye wastewaters were tested. The effects of its dosage, cationic degree, intrinsic viscosity and dye solution pH on decolorization were studied. The results show that： The optimum dosage of P（ AM -DMC）increases with the increase of the sulfonic group numbers in dye molecule, but decreases with the increase of the cationic degree in flocculant; When the cationic degree is more than 52%, the best decolorization efficiencies on the 4 kinds of simulated reactive dye wastewaters are similar; The effect of intrinsic viscosity on decolorization is very little; The decolorizing property of P （ AM - DMC） is better in faintly acid and neutral conditions of dye solution. The decolorization mechanism of reactive dye wastewater by P（AM- DMC）is： -N^＋ （CH3）3 in P（AM-DMC） links with -SO3^- in dye molecule to create -N^＋ （CH3）3SO3^--, at the same time, intermolecular hydrogen bonding is formed and this makes dye molecules aggregating and settling by bonding action.

关 键 词：丙烯酰胺-2-甲基丙烯酰氧乙基三甲基氯化铵 阳离子絮凝剂 活性染料 絮凝 脱色 废水处理 

分 类 号：X703.5[环境科学与工程—环境工程]