摘要
采用无机引发剂和有机引发剂A作为复合引发剂,通过水溶液聚合法合成了高分子量阳离子聚丙烯酰胺P(AM-DAC)。优化合成条件为:无机引发剂质量分数0.15‰、有机引发剂A质量分数0.50‰、单体总质量分数30%、阳离子度40%和增溶剂B用量0.20‰。在该条件下,所得产物分子量为1.2×107,溶解时间为3h。IR分析证实了产物结构。DTA-TGA分析表明P(AM-DAC)在常温下不分解。浓缩污泥脱水实验结果表明:阳离子度为40%～80%的自制P(AM-DAC)均能取得良好的污泥脱水效果,滤液透光率大于92%,滤饼含水率低于68%。当投加量为1.47kg/tdrysludge时,分子量为1.2×107,阳离子度40%的P(AM-DAC)处理效果最好,滤液透光率达96.90%,滤饼含水率达64.50%。污泥脱水效果和处理成本优于国内污水处理厂一些常用絮凝剂。
Cationic polyacrylamide （P （AM-DAC）） is synthesized by aqueous copolymerization using composite initiator system consists of redox initiator and organic initiator A. The optimum conditions used are as follows： the mass fraction of the redox initiator is 0.15‰, the mass fraction of the organic initiator A is 0.5‰, the gross mass fraction of monomer is 30%, the cationic degree is 40%, and the amount of solubilizer B is 0.20%o. Under these conditions, the molecular weight of the product got is 1.2 X 107 , the dissolving time is 3 h. The structure is proved by IR analysis. DTA-TGA analysis shows that P（AM-DAC） can not be decomposed at room temperature. The results of concentrated sludge dewatering test show that good sludge dewatering results can be achieved using self-made P（AM-DAC） with 40%-80% cationic degree, the transmittance of filtrate is higher than 92%, and the water content ratio of filter cake is lower than 68%. The best sludge dewatering result can be achieved by using the self-made P（AM-DAC） with molecular weight 1. 2× 10^7, cationic degree 40%, the optimum dosage 1, 47 kg/t dry sludge, and the transmittance of filtrate is 96. 90%, the water ratio of filter cake is 64. 50%. The sludge dewatering performance is better than flocculants used in domestic sewage treatment works.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第7期115-122,共8页
Journal of Chongqing University
基金
国家自然科学基金资助项目(20777095)
重庆市重点科技攻关资助项目(CSTC,2006AB7055)
浙江省科技资助项目(2009C33072)
关键词
阳离子聚丙烯酰胺
污泥脱水
共聚合
絮凝剂
cationic polyacrylamide
sludge dewatering
copolymerization
flocculant
