| abstract |
The invention discloses a core-shell structure polymer magnetic nanosphere with high Cr(VI) adsorption capacity and a preparation method and application thereof. The preparation method includes the following steps: adding Fe 3 O 4 powder into a mixed solution of water and ethanol, ultrasonically making Fe 3 O 4 evenly dispersed in the solution, and then adding resorcinol and formaldehyde to the suspension in sequence , adjust the pH, and stir the reaction to obtain Fe 3 O 4 @RF; take Fe 3 O 4 @RF and evenly disperse it in the chitosan solution, add the obtained suspension dropwise to the mixed solution of paraffin and Span, stir After a period of time, an aqueous solution of glutaraldehyde is added, and the reaction is stirred to obtain magnetic chitosan nanospheres. The magnetic chitosan nanospheres prepared by the invention can be used for adsorbing Cr(VI) in an aqueous solution. The magnetic chitosan nanospheres prepared by the invention not only have high adsorption capacity for Cr(VI), but also can realize rapid separation by applying an external magnetic field after adsorption, and have excellent cyclic adsorption performance. |