The invention belongs to the field of
material chemistry, and discloses a
nitrogen-doped
zinc-based adsorbent, a preparation method of the
nitrogen-doped
zinc-based adsorbent and application of the
nitrogen-doped
zinc-based adsorbent in radioactive cesium removal, and the preparation method of the nitrogen-doped zinc-based adsorbent comprises the following steps: step 1, preparing a ZIF-8 precursor with a
dodecahedron structure; step 2, preparation of HNZOR or HNZSS: dispersing the ZIF-8 precursor obtained in the step 1 in a
solvent, carrying out a low-temperature
hydrothermal reaction at 150-200 DEG C, collecting a product after the reaction is completed, washing and carrying out
vacuum drying to obtain HNZOR; the preparation method comprises the following steps: dispersing HNZOR in water, carrying out secondary low-temperature
hydrothermal reaction in an
ammonium hydroxide environment at 120-180 DEG C, collecting a product after the reaction is completed, washing and carrying out
vacuum drying to obtain HNZSS; and 3, activating the HNZOR or HNZOR obtained in the step 2 by using
potassium salt containing K < + >, and after activation is completed, washing and
drying to obtain the nitrogen-doped zinc-based adsorbent. The adsorbent disclosed by the invention can be widely applied to removal and enrichment of Cs < + > in
nuclear power plant wastewater,
accident emergency water bodies and high-salt complex waste liquid.