Preparation method and application of modified natural cellulose adsorbent for repairing cadmium-polluted soil

The invention discloses a preparation method and application of a modified natural cellulose adsorbent for repairing cadmium-polluted soil. The preparation method comprises the following steps: cleaning and grinding agricultural and forestry waste; removing redundant sugar in the agricultural and forestry waste by using an inorganic/organic solution in sequence; performing Soxhlet extraction on the dried forestry and agricultural waste to obtain cellulose; then putting the dried cellulose into a sodium hydroxide solution for mercerizing; then carrying out reflux reaction on the dried mercerized cellulose and succinic anhydride in an organic solution; after a reaction is completed, conducting washing until a pH value is 7, and carrying out drying and aging; and subjecting the aged cellulose to reacting with a sodium bicarbonate solution, and sequentially carrying out cleaning and drying to obtain a modified natural cellulose adsorbent. A soil activator into cadmium-polluted soil to activate heavy metal cadmium