In recent years, chromium pollution has become more and more serious, and how to efficiently dispose of chromium pollution, especially Cr(Ⅵ), has become a key issue for the industry to solve. In this paper, magnetic chitosan microspheres (MCPs) were prepared by emulsification cross-linking method, and polyacryloyloxytrimethylammonium chloride-modified magnetic chitosan microspheres (PMCPs) were successfully prepared by grafting on the surface of MCPs through chemical modification. On this basis, the adsorption behavior of PMCPs to Cr(Ⅵ) was systematically investigated. It was found that PMCPs were effective in removing Cr(Ⅵ) from wastewater, exhibiting maximum adsorption capacity of 90.55 mg/g at pH=2 and initial solution concentration of 100 mg/L. It was also found that the adsorption behavior of Cr(Ⅵ) by PMCPs conformed to the quasi-primary and quasi-secondary kinetic models, and the adsorption process was chemisorption. The adsorption regeneration experiments showed that the PMCPs possessed excellent reusability, which maintained adsorption rate of 73.08 % even after five cycles. This work provided a novel strategy for efficient disposition of Cr(Ⅵ) wastewater.

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