Preparation method of bio-adsorbent with using camellia oleifera shell

The invention relates to a preparation method of a water treatment agent, in particular to a preparation method of a bio-adsorbent with using camellia oleifera shells. The preparation method comprises the following steps: mixing the camellia oleifera shells with the particle size of 500-600 mu m with a modifier according to the mass-to-volume ratio of 1 to 0.5-15, putting the mixture in a flask with three mouths, adding a catalyst with stirring, stirring for a modification reaction at the temperature of 30-100 DEG C, filtering and then washing the filter residue with distilled water until the filtrate is neutral, drying the filter residue at the temperature of 40-60 DEG C to constant weight to obtain the bio-adsorbent. The bio-adsorbent is applied for treating heavy metal waste water and dye waste water as the water treatment agent. Compared with the prior art, waste is utilized as raw material, so that the advantages of extensive sources, low cost, benefit for comprehensive utilization, and reduction of waste emissions are achieved; the preparation method has the advantages of simple technology, low cost, large adsorption capacity, and can be widely used for treating pollutant effluents with good water treatment results; and the reaction conditions are mild and easy to control, the steps of modification reaction are simple, and the equipment of the technology is few.