壳聚糖的絮凝性能及其在废水脱色处理中的应用  

Flocculation performance of chitosan and its application in decolorization of wastewater

作　　者：谢婷玉[1] 荆肇乾[1] 王郑[1] 徐佳莹[1] 

机构地区：[1]南京林业大学土木工程学院,江苏南京210037

出　　处：《化工环保》2016年第4期381-385,共5页Environmental Protection of Chemical Industry

基　　金：国家科技支撑计划项目(2015BAL02B04);住房和城乡建设部科学技术项目(2015-K7-012)

摘　　要：介绍了壳聚糖的理化性质及其作为絮凝剂的优点,探讨了壳聚糖的絮凝机理,分析了壳聚糖絮凝效果的影响因素(包括废水p H、絮凝温度、搅拌转速及时间、壳聚糖投加量、壳聚糖脱乙酰度及相对分子质量、废水浊度),总结了壳聚糖改性和复合后在废水脱色处理中的应用。指出:未来还需更深入地研究絮凝机理,同时也需进一步研究影响絮凝效果的因素;新型壳聚糖絮凝剂将向更高效、成本更低且环境友好的方向发展。The physicochemical properties of chitosan and its advantages used as a flocculant are introduced, and the flocculation mechanism of chitosan is discussed. The factors affecting flocculation are analyzed, such as： wastewater pH, flocculation temperature, stirring speed and time, chitosan dosage, deacetylation degree and relative molecular mass of chitosan and wastewater turbidity, and so on. The applications of modified and composite chitosan in decolorization treatment of wastewater are summarized. It is pointed out that The flocculation mechanism and the affecting factors should be further studied in the future, and novel chitosan flocculant with higher efficiency, lower cost and more environmental friendliness will be developed.

关 键 词：壳聚糖 絮凝 机理 脱色 

分 类 号：X791[环境科学与工程—环境工程]