▎ 摘　　要

NOVELTY - Surface source pollution adsorbent comprises 100 pts. wt. carbon nitride, 4-7 pts. wt. calcium salt, 3-5 pts. wt. phosphate, 15-20 pts. wt. iron salt, 5-10 pts. wt. ferrous salt and 1-5 pts. wt. graphene oxide with 25-30% oxygen content. USE - The surface source pollution adsorbent is useful in the repairing treatment of non-point source polluted soil (claimed), preferably separation of heavy metal elements. ADVANTAGE - The surface source pollution adsorbent: utilizes magnetic raw materials; can be separated thus realizes the separation of heavy metal elements from the non-point source polluted soil, and realizes the separation and recovery of heavy metal elements. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing surface source pollution adsorbent, comprising (i) mixing the carbon nitride, the calcium salt and the phosphate and subjecting to a hydrothermal reaction to obtain a hydroxyapatite-modified carbon nitride; and (ii) mixing the graphene oxide, the iron salt, the ferrous salt and the hydroxyapatite-modified nitridation and performing a hydrothermal reaction.