新型水滑石接枝污泥处理乳剂的合成与应用  

Preparation of hybrid cationic graft hydrotalcite and application in sludge-dewatering

作　　者：祁佩时[1] 綦峥[1] 

机构地区：[1]哈尔滨工业大学市政与环境工程学院,城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090

出　　处：《环境污染与防治》2009年第5期4-7,共4页Environmental Pollution & Control

基　　金：国家科技支撑计划项目(No.2006BAC19B04)

摘　　要：以去除碳酸根后的镁铝水滑石正电胶团簇(LDHEPCL)作骨架,合成新型水滑石接枝污泥处理乳剂。用硫酸铈作引发剂,通过程序升温,实现了油包水多面液胞(W/O PHC)中丙烯酰胺(AM)、二甲基二烯丙基氯化铵(DMDAAC)与去除碳酸根后的LDHEPCL接枝聚合,制得污泥处理乳剂——LDHEPCL-PAM-PDMDAAC共聚物乳剂。聚合升温速度为2.5℃/min,最高温度为(98±1)℃,各配料最佳摩尔比为LDHEPCL∶AM∶DMDAAC=0.15∶0.57∶0.28。与目前最好的污泥处理乳剂FLOPAMREM235及STCPA EM6040相比,LDHEPCL-PAM-PDMDAAC共聚物乳剂具有絮团致密、絮层高度低、与聚合铝(PAC)及羧甲基壳聚糖(CMC)配伍较好等优点。A novel ternary graft copolymer （LDHECL-PAM-PDMDAAC）, with decarbonated hydrotalcite （LDHEPCL） as cationic backbone, acrylamide （AM） and dimethyl-diallyl-ammonium chloride （DMDAAC） as grafting monomers, was prepared within water in oil （W/O） ＂Polyhedral Cell＂ （PHC）. The copolymerization process of LDHEPCL,PAM and PDMDAAC was presented in detail. Optimal condition of the process was heating rate= 2. 5 ℃/min, LDHEPCL ： AM ： DMDAAC： 0.15 ： 0.57 ： 0.28. The maximum temperature could reached up to （98±1） ℃. Three sludge samples were prepared for the comparisons of LDHEPCL-PAM-PDMDAAC, FLOPAM^R EM235 and STCPA EM6040, LDHEPCL-PAM-PDMDAAC presented the best performances for the ftocculation ability, small dosage and strong dehydration capability. Some flocculating and dewatering mechanisms were also discussed.

关 键 词：污泥处理乳剂 多面液胞 镁铝水滑石骨架 接枝聚合物 

分 类 号：X703.5[环境科学与工程—环境工程]