Abstract:

A flocculant,called dithiocarboxyl amino-methylated polyacrylamide(DTAPAM),has been synthesized from amino-methylated polyacrylamide(APAM),carbon disulfide(CS₂) and sodium hydroxide(NaOH). The preparation conditions of DTAPAM are investigated. The results show that when the concentration of APAM is 3.0%,molar ratio for APAM,CS₂ and NaOH is 1:2:2,pre-reaction time is 30 min,pre-reaction temperature is 25℃,main-reaction time is 90 min and main-reaction temperature is 40℃,the removing capacity of DTAPAM is the best. The optimal dosage increases with the increase of Cd(Ⅱ)initial concentration.

Key words: macromolecule flocculant, chelation precipitation, wastewater containing cadmium

摘要：

以胺甲基化聚丙烯酰胺（APAM）、二硫化碳、氢氧化钠为原料合成了二硫代羧基化胺甲基聚丙烯酰胺（DTAPAM）。考察了DTAPAM的制备条件。结果表明，在APAM质量分数3.0%，APAM、CS₂、NaOH物质量比1：2：2，预反应时间30 min，预反应温度25℃，主反应时间90 min，主反应温度40℃时，DTAPAM除镉性能最好，其最佳投药量随着Cd（Ⅱ）初始浓度的增加而增加。

关键词: 高分子絮凝剂, 螯合沉淀, 含镉废水

CLC Number: 

• TQ314.253