Preparation method of rice husk carbon-based pollutant removal material

The invention relates to a preparation method of a rice husk carbon-based pollutant removal material, which comprises the following steps: S1, calcining rice husks to obtain rice husk carbon; s2, adding rice husk charcoal and FeCl3 into the beaker; s3, adding water into a beaker to perform equivalent-volume impregnation on the rice husk charcoal and the FeCl3, and stirring a mixture of the water, the rice husk charcoal and the FeCl3 in the beaker; s4, alternately carrying out suction filtration and cleaning on the mixture until the conductivity of filtrate obtained by suction filtration is lower than 20 [mu] S/cm, so as to obtain modified rice husk charcoal; and S5, drying the modified rice husk charcoal by adopting a drying oven to obtain the rice husk charcoal-based pollutant removal material. Due to the adoption of the technical scheme, the rice husk carbon-based pollutant removal material prepared by the preparation method disclosed by the invention can be used for improving the removal effect on selenium