摘要
采用微波辐射法合成了壳聚糖-丙烯酰胺接枝共聚物。通过傅立叶变换红外光谱(FTIR)谱图对比分析表明,丙烯酰胺成功地接枝到壳聚糖上,发生了接枝共聚反应;产物的热重-差热(TG-DSC)谱图表明,壳聚糖-丙烯酰胺接枝共聚物的热稳定性比壳聚糖差。壳聚糖-丙烯酰胺接枝共聚物作为絮凝剂处理高岭土悬浊液的最佳条件为:絮凝剂加入量4.0 mg/L,沉降时间20 min,溶液pH 7。处理印染废水时,与壳聚糖相比,壳聚糖-丙烯酰胺接枝共聚物加入量较少而COD去除效果较好。在废水pH为7、絮凝剂加入量为100 mg/L、沉降时间为20 min的条件下,壳聚糖-丙烯酰胺接枝共聚物对废水COD去除率达41.55%。
The chitosan-acrylamide graft copolymer was synthesized by microwave radiation method. The FTIR analysis results show that the acrylamide molecule has been successfully grafted onto the chitosan molecule; The TG-DSC analysis curves of the products indicate that the thermal stability of the chitosan-acrylamide graft copolymer is worse than that of chitosan. The optimum conditions for treatment of kaolin suspension using the chitosan-acrylamide graft copolymer as flocculant are as follows ： flocculant dosage 4.0 mg/L, settling time 20 min, solution pH 7. In the treatment of dyeing wastewater, the chitosan-acrylamide graft copolymer has a less dosage and a better COD removal effect in comparison with chitosan. When the wastewater pH is 7, the flocculant dosage is 100 mg/L and the settling time is 20 min, the COD removal rate is 41.55%.
出处
《化工环保》
CAS
CSCD
北大核心
2010年第6期534-538,共5页
Environmental Protection of Chemical Industry
基金
江苏省"青蓝工程"资助项目(164030020)
关键词
微波辐射
壳聚糖
丙烯酰胺
接枝共聚
高岭土
印染废水
絮凝
microwave radiation
chitosan
aerylamide
graft copolymerization
kaolin
dyeing wastewater
flocculation
