全文下载：2013050474
刘娟a， 武玉民b*
(青岛科技大学 a.环境与安全工程学院;b.化工学院，山东 青岛 266042)
摘要：采用分散聚合法合成壳聚糖-聚丙烯酰胺P(CMTC-AM-DMC)絮凝剂，研究了该絮凝剂投加量、pH、搅拌强度和时间等因素对Cu2+的絮凝捕集性能，并与聚合氯化铝(PAC)以及实验自制的羧甲基硫脲基壳聚糖(CMTC)进行比较。结果表明：当Cu2+质量浓度为20 mg·L-1，pH=6~8，搅拌强度为150 r·min-1时，投加20~40 mg·L-1的P(CMTC-AM-DMC)絮凝剂对Cu2+的捕集率即可达到90%，PAC的用量为240 mg·L-1，pH为6时，对Cu2+的捕集率为90%。CMTC的用量为1~2 mg·L-1，pH为6时，对Cu2+的捕集率为80%~90%。
关键词：聚丙烯酰胺； 重金属； 絮凝； 壳聚糖
中图分类号： TQ 937+.2； TU 528.042文献标志码： A
Flocculation Capability of P(CMTC-AM-DMC) for Copper Ions
LIU Juana， WU Yu-minb
（a.College of Environment and Safety Engineering；
b.College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China）
Abstract:The compound flocculant of chitosan and polyacrylamide P(CMTC-AM- DMC) was prepared by dispersion polymerization. The flocculation and trapping capability of P(CMTC-AM-DMC) for Cu2+ was investigated. The factors were discussed such as dosage, pH, stirring speed and time, etc. The results showed that, the rate of Cu2+ removal could be up to 90% with 20 mg·L-1 of Cu2+ concentration, 6—8 of pH, 20—40 mg·L-1 of P(CMTC-AM-DMC) under 150 r·min-1 of shear force, when the trapping capability could be 90% and the dosage of PAC reach at 240 mg·L-1 with 6 of pH. When the dosage of CMTC was 1—2 mg·L-1, pH was 6, its trapping rate for Cu2+ could reach 80%—90%.
Key words:polyacrylamide； heavy metal； flocculation； chitosan
收稿日期：2012-10-10
作者简介： 刘娟（1979—），女，博士，讲师.*通信联系人.
