N-羧乙基壳聚糖对重金属汞离子絮凝效果的研究

摘要

N-羧乙基壳聚糖(NCECS)分子结构中既有氨基又有羧基,是一种两性的壳聚糖衍生物,具有生物相容性、生物降解性、无毒性等特点.合成了一种部分取代的NCECS,用傅里叶红外光谱(FTIR)、元素分析仪对其结构及取代度进行了表征,重点研究了NCECS浓度、絮凝时间、pH等因素对重金属Hg2+的去除率的影响,并探讨了NCECS对重金属的吸附机理,指出NCECS是一种生物相容的废水处理剂.%N-carboxyethylchitosan (NCECS) is a kind of amphiphilic chitosan derivative having both amino and carboxyl groups. It is biocompatible, biodegradable, and nontoxic. NCECS which is partly substituted has been prepared. Its structure and substitute value are characterized by FTIR and element analyzer. The effects of the influencing factors, such as NCECS concentration, flocculation time, pH, etc. On the removal rate of mercury ions are investigated. The adsorption mechanism of NCECS on heavy metals is investigated. NCECS is a kind of biocompatible wastewater treatment agent.