▎ 摘　　要

NOVELTY - Copper ion adsorbent is claimed. The copper ion adsorbent is phytic acid modified three-dimensional graphene powder. USE - Used as copper ion adsorbent. ADVANTAGE - The adsorbent: has improved the stability of the original two-dimensional graphene sheet, increased the specific surface area, and increased affinity for copper ions in water; provides more adsorption sites; achieves homogeneous adsorption to maximize adsorption capacity; provides a simple, fast, economical, high-efficiency and practical method for adsorbing copper ions in water; and is suitable for treatment of heavy metal ions in water. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing copper ion adsorbent comprising adding graphene oxide diluent into phytic acid solution, mixing, transferring it to a PTFE hydrothermal reactor, performing hydrothermal reaction, cooling the reactor to room temperature, separating the solid particles in the mixed solution, soaking in high-purity water, washing the solid particles with water, fully shaking in a shaker, and drying the solid particles to obtain final product; and (2) copper ion absorbing, comprising adding the copper ion adsorbent to a copper ion solution, placing in a constant temperature oscillator for reaction and filtering.