Aminated chitosan silicon dioxide microspheres as well as preparation method and application thereof

The invention belongs to the technical field of environmental protection, and particularly relates to aminated chitosan silicon dioxide microspheres as well as a preparation method and application thereof. The invention provides a preparation method of aminated chitosan silicon dioxide microspheres, which comprises the following steps: 1) dissolving chitosan in an acid solution, then adding silicon dioxide microspheres, stirring, carrying out solid-liquid separation, and drying to obtain chitosan silicon dioxide microspheres; and 2) mixing the chitosan silicon dioxide microspheres, epoxy chloropropane and an organic solvent, heating and stirring, then adding diethylenetriamine, continuously stirring, carrying out solid-liquid separation, and drying to obtain the aminated chitosan silicon dioxide microspheres. According to the aminated chitosan silicon dioxide microsphere provided by the invention, the adsorption capacity of a microsphere material to Cr (VI) is greatly improved. 本发明属于环保技术领域，具体涉及一种氨基化壳聚糖二氧化硅微球及