▎ 摘　　要

NOVELTY - Harmful gas adsorbent composition comprises transition metal ions that are ionically bonded to the surface of oxidized particles. USE - Used as harmful gas adsorbent composition. ADVANTAGE - The composition has excellent deodorization performance by controlling the particle size of the adsorbent particles and oxygen content in a certain range, is simple in manufacturing, economical and enhances productivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for manufacturing harmful gas adsorption particles, comprising oxidizing the surface of the adsorbent through cold plasma treatment, and binding metal ions to hydroxy groups on the acidified surface by treatment with an aqueous solution of metal ions.