Nitrogen heterocyclic ring compound modified magnetic polystyrene microsphere, preparation method and application thereof

一种含氮杂环化合物改性磁性聚苯乙烯微球、制备方法及其应用

Abstract

本发明属于水处理领域,具体涉及一种含氮杂环化合物改性磁性聚苯乙烯微球、制备方法及用于吸附Cr(VI)的方法。杂化化合物包括哌啶、吡啶、咪唑、甲基咪唑、三氮唑、三唑钠或其盐类。制备方法包括:(1)利用改进悬浮聚合法制备磁性聚苯乙烯微球;(2)利用Friedel-Crafts酰基化反应在颗粒表面引入烷基氯基团;(3)通过微球在有机溶剂中与含氮杂环化合物发生取代反应得到含氮杂环化合物改性磁性聚苯乙烯微球。该微球作为吸附剂,适用于含铬废水中Cr(VI)的选择性吸附脱除,且制备过程简单,收率高,在含铬废水处理方面有比较广阔的应用前景。
The invention belongs to the field of water treatment, and in particular relates to a nitrogen heterocyclic ring compound modified magnetic polystyrene microsphere, a preparation method and a method for utilizing the microsphere to adsorb Cr(VI). The heterocyclic ring compound comprises piperidine, pyridine, imidazole, methyl imidazole, triazole, sodium triazole or a salt thereof. The preparation method comprises the following steps: (1) utilizing an improved suspension polymerization method to prepare a magnetic polystyrene microsphere; (2) utilizing a Friedel-Crafts acylation reaction to introduce an alkyl chloride group to the surface of the particle; (3) carrying out a substitution reaction between the microsphere and the nitrogen heterocyclic ring compound in an organic solvent to obtain the nitrogen heterocyclic ring compound modified magnetic polystyrene microsphere. The microsphere is used as an adsorbent to selectively adsorb and remove Cr(VI) from chromium-containing wastewater; the preparation method is simple in process and high in yield; the microsphere can be widely applied to the chromium-containing wastewater treatment.

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