▎ 摘　　要

NOVELTY - Preparing modified graphene oxide adsorbent comprises (1) adding graphite powder and sodium nitrate to concentrated sulfuric acid solution for reaction, and then adding a hydrogen peroxide solution to react, washing, and obtaining the graphene oxide solution to obtain the first reaction solution, (2) sequentially performing the ultrasonic treatment and heating treatment on the first reaction solution, and dropwise adding an ethylenediamine solution to the treated first reaction solution to obtain a second reaction solution; (3) allowing the second reaction solution to stand, stirring uniformly, dropwise adding ethylene diamine solution to obtain a third reaction solution; and (4) adding carbon disulfide to the third reaction solution and heating the reaction to obtain an ethylenediamine-supported carbon disulfide-modified graphene oxide adsorbent. USE - The adsorbent is useful in adsorbing heavy metal ions (claimed). ADVANTAGE - The adsorbent: can significantly improve the adsorption effect of various heavy metal ions in the desulfurization slurry, reduce the amount of adsorbent used, can efficiently recover the adsorbent for continued use, avoids the divalent mercury, and reduces secondary pollution to the environment. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for modified graphene oxide adsorbent.