The invention relates to a preparation method of
biomass Fe-based
porous carbon composite adsorption material. Palm fibers are used as raw materials, and the method comprises the following steps: 1, palm fibers are washed, and dried at 50-80 DEG C and
cut up; 2. palm fibers are placed in a
sodium hydroxide solution, stirring and filtering are carried out, washing is carried out till pH value is neutral, and then
drying is carried out; 3. preoxidation treatment of the palm fibers are carried out 200-400 DEG C under
air atmosphere for 1-5 hours, cooling is carried out till the temperature is ata
room temperature, heating rate is 1-5 DEG C / min, heating is carried out till the temperature is at 600-1200 DEG C, constant
temperature treatment is carried out at 60-240 minutes, finally
cooling rate is controlled at 2-10 DEG C / min and the materials are cooled to a
room temperature and taken out, and the materials are immersed in a solution of
ferric salt; after the immersion ends, filtering iscarried out, and then under protection of
nitrogen, heating rate is 1-5 DEG C / min, heating is carried out till the temperature is at 500-800 DEG C, constant
temperature treatment is carried out at 30-240 minutes, and finally the
cooling rate is controlled at 2-10 DEG C / min, cooling is carried out till the temperature is at
room temperature, and the composite adsorption material is obtained. The removal rate of adsorption materials for
molybdate ions reaches 95% or above in a wider pH value range.