卢闻君,郭明,杨世昌,孙立苹

• 1:浙江农林大学理学院
• 2:浙江农林大学林业与生物技术学院

摘要(Abstract)：

在重金属复合污染治理中,为开发具备高性能的新型功能吸附剂,研究采用共沉淀法制备磁性载体粒子(MNP),硅烷化、Michael加成及酰胺化反应以"发散"形态于表面合成端氨基超支化分子(MD),交联活化改性壳聚糖(CMCS),制备出新型磁性功能吸附材料(CCMD)。利用傅立叶变换红外光谱(FT-IR)、比表面积分析仪、元素分析仪结构表征产物;X射线衍射仪(XRD)、扫描/透射电镜(SEM/TEM)分析产物晶型及表观形貌;热重分析仪(TG)测试产物的热敏感性能;振动样品磁强计(VSM)和Zeta电位分析仪测试样品光电磁性;并开展吸附性能研究。结果表明:成功制备出目标功能化合物(CCMD),CCMD粒径为13～19nm,呈顺磁性磁铁矿晶型,MNP、MD、CCMD磁化值分别为11.6,11.3和9.0 emu×g~(-1),Zeta电位测试显示MD和CCMD电位随pH升高而降低,且CCMD表面电位高于MD,以上测试结果同时也进一步证实产物的成功制备。吸附研究结果表明:当pH分别为11和5时,对重金属Cd(II)离子与F离子表现出高效吸附能力,具有pH智能响应特征,且最大吸附容量为79.12和65.05mg×g~(-1)。重复吸附-脱附实验表明CCMD对Cd(II)和F去除率均在75%以上,再生性能良好。

关键词(KeyWords)： 羧甲基壳聚糖;超支化分子;结构表征;pH智能响应;吸附性能

Abstract:

Keywords:

基金项目(Foundation): 浙江省自然科学基金(LY18B070003);; 浙江省科技计划项目(2015SY11)

作者(Author): 卢闻君,郭明,杨世昌,孙立苹

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