摘要
采用离子印迹技术,以Pb2+作为模板离子,制备新型Pb2+印迹凹土/壳聚糖有机-无机杂化材料,利用平衡吸附法研究了印迹材料的制备工艺和选择识别能力,并运用多种技术手段进行了表征。结果表明,最佳制备工艺为:反应温度55℃,反应时间3.0 h,体系pH值5.0,Pb2+模板-CA与交联剂质量比1∶5。印迹材料对Pb2+最大吸附量为45.78 mg/g,相对Ca2+选择性系数为96.08,其对Pb2+具有较强的选择性识别能力,重复使用性能稳定。
A Pb2＋-imprinted chitosan/attapulgite composite materials sorbent was prepared by surface imprinted method. The adsorption preparation technology and selective recognition ability of the imprinted sorbent were studied by equilibrium-adsorption method, and have been characterized by a variety of technical means. The results showed that the optimum technology of preparation of the composite sorption materials had been explored： the reaction temperature, reaction time, reaction system pH value and templates-CA and crosslinker ratio were 55℃, 3.0 h, 5.0 and 1 ： 5, respectively, and the maximum static adsorption capacity of the imprinted sorbent to Pb2＋ was 45.78 mg/g, relative selectivity coefficient is 96.08, and the imprinted sorbent could be used repeatedly and indicated high selectivity for Pb2＋.
出处
《非金属矿》
CAS
CSCD
北大核心
2013年第6期77-80,共4页
Non-Metallic Mines
基金
国家自然科学基金(51174096)
淮安市工业支撑项目(HAG2010011)
关键词
凹土
壳聚糖
离子印迹
铅离子
选择性
attapulgite chitosan ions-imprinted Pb2＋ selectivity
