阳离子聚丙烯酰胺污泥脱水絮凝剂的制备.pdf

维普资讯
化工进展
564
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2008年第27卷第4期
阳离子聚丙烯酰胺污泥脱水絮凝剂的制备
郑怀礼123,李凌春3,蔚阳3,唐雪23,杨铀3,张胜涛3
(1重庆大学三峡库区生态环境教育部重点实验室,重庆4005;:2重庆大学城市建设与环境工程学院,
重庆400045;3重庆大学化学化工学院,重庆40004)
摘要:根据受尼期反应,在适宜的温度下,加入引发剂,使丙烯酰胺单体与丙烯酰氧乙基三甲基氯化铵阳离子
单体发生自由基共聚反应,获得了阳离子聚丙媂酰胺高分子絮凝剂荆;系统地研究了共聚反应过程中单体总浓度、
引发剂用量、聚合温度、pH值、增溶剂等因素对阳离子聚丙烯酰胺主要性能的影响,得出了最优反应条件:聚合
温度为35℃,单体总浓度为20%,AM与DAC的相对摩尔比为6:1,复合引发荆为0.08%,pH值为7,增落
剂为2%,通入氩气时间为15min,反应时间为5h。在上述反应条件下合成了溶解性好、综合成本低、絮凝效果
好、相对分子质量达3.00×10°的聚丙烯酰胺产物
关键词:污泥脱水絮凝剂;共聚;自由基聚合;聚丙烯酰胺
中图分类号:TQ314.2文献标识码:A文章编号:1000-6613(2008)04-0564-05
Synthesis of cationic polyacrylamide fiocculant for sludge dewatering
ZHENG Hwaili', L Lin,, YU Yang, TANG Xue, YANG You,, ZHANG Shengtao
Key Laboratory of the Three Gorges Reservoir Regions Eco-environment, Ministry of Education, Chongqing
University, Chongqing 400045, China; School of Urban Construction &Environmental Engineering
Chongqing University, Chongqing 400045, China; School of Chemistry and Chemical Engineering
Chongqing University, Chongqing 400044, China)
Abstract According to the Mannich reaction, initiators were added at appropriate temperatures to
acrylamide (AM)and dimethylamino ethyl acrylate methyl chloride (DAC)to initiate a free-radical
co-reaction between AM and DAC and then to prepare cationic polyacrylamide (CPAM
macromolecular flocculant. The influences of such factors, as total concentration of monomers, use of
initiators, copolymerization temperature, ph value and solubilizer on the main characteristics of CPAM
in the process of the co-reaction were investigated, and the optimal reaction conditions were obtained as
follow copolymerization temperature 35 total concentration of monomers 20%, relative molar ratio
6: 1, composite initiator 0.08 PH value 7, solubilizer 2 time of ventilating nitrogen 15min
and reaction time 5h. Under the conditions above, a CPAM product with good solubility and flocculation
property, low combined costs and molecular weight of 3.00x10 was synthesized
Key words: flocculant for sludge dewa erin cool mez ion; free-radical pol tion; polyacrylamide
近年来,我国城镇化快速发展,城镇污水产生量水量高而不易脱水,因此在剩余污泥处理过程中必须
与日俱增,污水处理量快速增长。在城镇污水处理过
程中,会产生大量的剩余污泥。剩余污泥中通常含有
收稿日期:2007-10-18;修改稿日期:2007-10-30。
基金项目:国家自然科学基金项目(2077095);重庆市自然科学基
大量的有毒有害物质、营养素、有机物和水分等,稳
金重点项目(CSTC,2006BA7029);三峡库区生态环境教育部重点实
定性差,容易腐化发臭,若不及时处理会造成严重环验室访问学者基金及重庆大学研究生科技创新基金
境污染。由于城镇污水处理厂剩余污泥颗粒细小,呈(20004A01031)。
第一作者简介:郑怀礼(1957~),男,教授,博士生导师,主要研
絮状及胶状结构,相对密度小,不易下沉沁、压实,含究方向为水处理剂,电话023-65120827E-mailzhenghe@cta.ca.cn