改性壳聚糖复合凹凸棒土絮凝油漆废水

• 作 者: 周健 董锐 董悦 付澎
• 机 构: 南京工业大学理学院,盐城工学院化学与生物工程学院,南京理工大学环境与生物工程学院,
• 出 处: 环境工程学报
• 发表日期: 2014年11期
• 关键词: 壳聚糖 改性壳聚糖 凹凸棒土 絮凝 复合絮凝剂 DMDAAC 油漆废水 接枝共聚物 絮凝剂 絮凝效果

将壳聚糖、阳离子淀粉和二甲基二烯丙基氯化铵(DMDAAC)进行三元接枝共聚,制备了三元接枝改性壳聚糖(CTS-DMDAAC-CS),通过红外光谱和扫描电镜对其结构进行了表征。并且将三元接枝改性壳聚糖与凹凸棒土进行优化复配,对油漆废水进行了絮凝实验,得出了当pH=12,沉降时间为20 min,复合絮凝剂投加量为0.2 g,三元接枝共聚物∶凹凸棒土=1∶10时,该复合絮凝剂对油漆去除率最佳能够达到89.3%,并且絮凝效果好,是一种新型绿色环保的有机-无机复合絮凝剂。

Ternary graft modified chitosan (CTS-DMDAAC-CS) was prepared by ternary graft copolymerization of chitosan, cationic starch and DMDAAC. Its structure was characterized by scanning electron microscopy. The ternary graft modified chitosan and attapulgite were optimally compounded. The flocculation experiment was carried out on the paint wastewater. The results showed that when the pH value was 12, the settling time was 20 min, the dosage of the composite flocculant was 0.2 g, ternary graft copolymer: attapulgite = 1:10, the composite flocculant can achieve 89.3% of the best paint removal rate and good flocculation effect, is a new type of green-friendly organic-inorganic composite flocculation Agent.