▎ 摘　　要

NOVELTY - Preparation of ultra-fast metal ion universal liquid adsorbent involves preparing graphene oxide (GO) concentrate, ultrasonically dissolving water-soluble polyethylene oxide (PEO) powder in ultrapure water, obtaining PEO aqueous solution, diluting GO concentrate, ultrasonically dispersing, obtaining GO aqueous solution, adding GO aqueous solution to a single-necked flask, adding PEO aqueous solution under magnetic stirring, and stirring. USE - Preparation of liquid adsorbent used for adsorbing metal ion e.g. mercury (all claimed) in metal ion-contaminated water. ADVANTAGE - The liquid adsorbent rapidly and effectively removes mixed metal ions in metal ion-contaminated water, and improves quality of water. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) ultra-fast metal ion universal liquid adsorbent, which comprises GO and PEO in the mass ratio of 7:1-1:7; (2) application of ultra-fast metal ion universal liquid adsorbent. The adsorption of metal ion is carried out using the ultra-fast metal ion universal liquid adsorbent at 25 degrees C. The adsorption pH of mercury is 2. The adsorption pH of other metal ions is 7; and (3) metal ion adsorption apparatus.