用于去除饮用水中硝基酚的双模板磁性分子印迹聚合物的制备及性能(英文)

被引:1
作者
欧阳伊雯
梁建军
高小峰
机构
[1] KeyLaboratoryoftheThreeGorgesReservoirRegion'sEco-Environment,MinistryofEducation,CollegeofEnvironmentandEcology,ChongqingUniversity
关键词
4-硝基苯酚; 2,4-二硝基酚; 双模板; 分子印迹聚合物; 吸附性能;
D O I
暂无
中图分类号
TQ317 [高分子化合物产品]; TU991.2 [净水工程(给水处理)];
学科分类号
摘要
为高效去除4-硝基酚(4-NP)和2,4-二硝基酚(2,4-DNP),本实验采用4-NP和2,4-DNP作为模板分子,以衣通酸(IA)为功能单体,磁性纳米氧化铁(Fe3O4@SiO2)为载体,乙二醇二甲基丙烯酸酯(EGDMA)为交联剂,偶氮二异丁腈(AIBN)为引发剂,采用表面分子印迹技术制备了双模板磁性分子印迹聚合物(D-MIPs)。利用傅里叶变换红外光谱(FT-IR)和扫描电子显微镜(SEM)对D-MIPs的形貌进行表征。研究了D-MIPs的吸附性能、可再生性和适用性。结果表明,D-MIPs成功地包覆在Fe3O4@SiO2载体表面,聚合效果良好,且具有特异的识别位点和良好的印迹性能,其直径为90 nm,形状均匀。4-NP-MIPs、2,4-DNP-MIPs和D-MIPs对目标分子的理论吸附量分别为103.97,73.14和123.99 mg/g,存在许多不同吸附能的吸附位点。D-MIPs在30 min内达到最佳吸附平衡状态,其最佳拟合模型为Freundlich吸附模型和拟二阶动力学模型,表明其吸附是通过化学吸附过程进行的。实验结果表明,在不同水样中,MIPs具有高度的特异性识别和选择性吸附能力。经过8次再生循环后,D-MIPs的吸附能力仅下降7.51%,证实了MIPs具有优异的再生性能。
引用
收藏
页码:138 / 150
页数:13
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