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作 者:郑怀礼[1,2] 唐雪[1] 沈烈翔 高旭[1] 王薇[1] 尤艳飞[1]
机构地区:[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [2]浙江嘉善海峡净水灵化工有限公司,浙江嘉善314100
出 处:《重庆大学学报(自然科学版)》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)
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.
分 类 号:X703.1[环境科学与工程—环境工程] TQ314.2[化学工程—高聚物工业]
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