摘要
通过在原料中引入尿素,合成出了改性双氰胺-甲醛絮凝脱色剂,并应用到印染废水处理中。采用正交实验方法确定了最佳合成条件,实验结果表明,在反应温度65℃、反应时间3h、反应物配比n(双氰胺)∶n(尿素)∶n(氯化铵)∶n(甲醛)为0.714∶0.286∶0.9∶1.4的最佳条件下,改性双氰胺-甲醛絮凝脱色剂具有优异的絮凝脱色性能,对实际印染废水的脱色率和COD去除率可分别达到99%和93.4%。
Modified dicyanodiamide-formaldehyde, a flocculating-decolorizing agent, was synthesized with adding urea into raw material and used in dyeing wastewater treatment. The optimum conditions were determined via orthogonal tests reaction temperature 65℃, reaction time 3 h, n （dicyanodiamide） ： n（urea） ： n（ammonium chloride） ： n（formaldehyde）0.714 ： 0. 286 ： 0.9 ： 1.4. The product has a good flocculating-decolorizing capability and was used in practical dyeing wastewater treatment with 99% of decolorization efficiency and 93.4% of COD removal efficiency.
出处
《化工环保》
CAS
CSCD
北大核心
2006年第3期250-254,共5页
Environmental Protection of Chemical Industry
关键词
双氰胺
甲醛
絮凝脱色剂
印染
脱色
废水处理
dicyandiamide
formaldehyde
flocculafing-decolorizing agent
printing and dyeing
decol- orizafion
wastewater treatment
