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Removal of methyl iodide (CH 3 I) from the air present within nuclear facilities is a critical issue. In case of any nuclear accident, there is a great need to mitigate the radioactive organic iodide immediately as it accumulates in human bodies, causing severe consequences. Current research focuses on removing organic iodides, for which the surface of activated carbon (AC) was modified by impregnating it with different metals individually, i.e. Ag, Ni, Zn, Cu and with the novel combination of these four metals (AZNC). After the impregnation of metals, triethylenediamine (TEDA) was coated on metal impregnated activated carbon (IAC) surface. The adsorption capacity of the combination of four metals IAC was found to be 276 mg/g as the maximum for the trapping of CH 3 I. Whereas TEDA-metal impregnation on ACs enhanced the removal efficiency of CH 3 I up to 352 mg/g. After impregnation, adsorption capacity of AZNC and AZNCT is significantly higher as compared to AC. According to the finding, t 5% of AZNCT IAC is 46 min, which is considerably higher than the t 5% of other tested adsorbents. According to isotherm fitting data, Langmuir isotherm was found superior for describing CH 3 I sorption onto AC and IACs. Kinetics study shows that pseudo second order model represented the sorption of CH 3 I more accurately than the pseudo first order. Thermodynamic studies gave negative value of ΔG which shows that the reaction is spontaneous in nature. Based on the findings, AZNCT IAC appears to have a great potential for air purification applications in order to obtain clean environment. • Metals and tertiary amine impregnated activated carbons were synthesized, for the removal of methyl iodide • AC and impregnated ACs samples characterized by XRD, SEM, EDX, BET, TGA and AAS • Enhanced efficiency of AZNCT impregnated AC for removal of CH 3 I up to 352 mg/g under severe conditions • Metal-TEDA impregnated ACs considered to be promising agent for the removal of radioactive CH 3 I in the context of nuclear power plant [ABSTRACT FROM AUTHOR]