Chemical adsorbents for removing or deactivating any one or more of impurities, pollutants, biological agents and toxic chemicals from air or other gases; chemical adsorbents to be applied to substrates for removing or deactivating any one or more of impurities, pollutants, biological agents and toxic chemicals from air or other gases; chemical adsorbents to be applied to substrates to be used as filters for removing or deactivating any one or more of impurities, pollutants, biological agents...