一锅法制备三嗪基多孔聚合物及对Pb~(2+)的吸附研究
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摘要
以三聚氰胺和对苯二甲酸,间苯二甲酸,邻苯二甲酸为合成单体,采用一锅缩聚法制备了一系列三嗪基多孔有机物聚合物(NPM,NMM,NOM)。探究了该聚合物对重金属Pb~(2+)在不同条件下的吸附性能,吸附过程相比Freundlich模型更加符合Langmuir模型。动力学研究表明此类聚合物对Pb~(2+)的吸附符合拟二级动力学。在实验中,吸附剂NPM、NMM和NOM对Pb~(2+)最大吸附容量分别为159.4、141.6、147.1 mg/g。聚合物具有优异的重复使用性能,在重复吸附测试五次的情况下,吸附量依然能达到最初的79.21%。
A series of triazine-based porous organic polymers(NPM, NMM, NOM) were prepared by one-pot polycondensation method using melamine and terephthalic acid, isophthalic acid, phthalic acid as synthetic monomers. The adsorption properties of the polymer for Pb~(2+) under different conditions were investigated. The adsorption process is more consistent with the Langmuir model than the Freundlich model. Kinetic studies indicate that the adsorption of Pb~(2+) is consistent with psedo-second-order. The maximum adsorption capacities of the adsorbents NPM, NMM and NOM for Pb~(2+) were 159.4, 141.6 and 147.1 mg/g,respectively. The polymer has excellent reusability, and the adsorption amout can still reach the initial 79.21% in the case of repeated adsorption tests 5 times.
A series of triazine-based porous organic polymers(NPM, NMM, NOM) were prepared by one-pot polycondensation method using melamine and terephthalic acid, isophthalic acid, phthalic acid as synthetic monomers. The adsorption properties of the polymer for Pb~(2+) under different conditions were investigated. The adsorption process is more consistent with the Langmuir model than the Freundlich model. Kinetic studies indicate that the adsorption of Pb~(2+) is consistent with psedo-second-order. The maximum adsorption capacities of the adsorbents NPM, NMM and NOM for Pb~(2+) were 159.4, 141.6 and 147.1 mg/g,respectively. The polymer has excellent reusability, and the adsorption amout can still reach the initial 79.21% in the case of repeated adsorption tests 5 times.
引文
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[3]刘立华,吴俊,李鑫,等.重金属螯合絮凝剂对废水中铅、镉的去除性能[J].环境工程学报,2011,5(5):1029-1034.
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[5]高余良,朱光明,马拖拖.Fe3O4磁性纳米粒子及其生物医学应用研究进展[J].化工进展,2017,36(3):973-980.
[6]陈东洋,刘程,王锦艳,等.纳米多孔有机聚合物电化学应用研究[J].高分子学报,2018,5:559-570.
[7]Zhao G,Huang X,Tang Z,Huang Q,et al.Polymer-based nanocomposites for heavy metal ions removal from aqueous solution:a review[J].Polymer Chemical,2018,9:3562-3582.
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[9]He Y,Liu Q Q,Hu J,et al.Efficient removal of Pb(II)by amine functionalized porous organic polymer through post-synthetic modification[J].Separation Purification Technology,2017,180:142-148.