▎ 摘　　要

NOVELTY - A chitosan-coated groundwater restoration agent with soil heavy-metal adsorption function, comprises 60-80 pts. wt. high-molecular chitosan, 2-3 pts. wt. crosslinked zeolite, 1-2 pts. wt. modified nano zero-valent iron, 5-8 pts. wt. hydroxyapatite, 1-2 pts. wt. graphene oxide, 1-2 pts. wt. peach wood powder, 6-9 pts. wt. ferrosoferric oxide magnetic particles, 1-2 pts. wt. ore, 1-2 pts. wt. clay, 6-8 pts. wt. carboxylic acid, 3-4 pts. wt. NaY zeolite, and water. USE - Chitosan-coated groundwater restoration agent with soil heavy-metal adsorption function (claimed). ADVANTAGE - The chitosan-coated groundwater restoration agent exhibits excellent groundwater restoration action over a long period of time. The porous outer layer of modified nano zero-valent iron, ore, and clay enables adsorption of heavy metal ions in groundwater. The inner chitosan-coated ferrosoferric oxide magnetic particles fix the heavy metals. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of chitosan-coated groundwater restoration agent, which involves dissolving carboxylic acid in 6-8 times water, heat-stirring to obtain uniform high-temperature acid solution, slowly adding high-molecular chitosan, stir-melting, adding NaY zeolite, slowly heat-stirring to obtain a coating solution, adding 5-6 times water to hydroxyapatite, heat-stirring to obtain a uniform solution, dispersing peach wood powder and magnetic particles in the solution, stirring uniformly, heat-vacuum-concentrating to form flocculent magnetic material, adding the magnetic material to coating solution, leaving still at high temperature for 5-9 days to obtain a composite, mixing the composite with graphene oxide and crosslinked zeolite, adding 2-3 times water, heat-stirring, leaving still for 3-5 days to obtain graphene-oxide-modified composite, stirring ore, clay, modified nano zero-valent iron, and water in high-temperature nitrogen environment at 120-140 degrees C for 8-10 minutes, adding modified composite, adding 0.3-0.5 times water, stirring uniformly, and granulating into particles of diameter 0.4-0.7 cm.