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



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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