Abstract:Activated carbon(AC) modified with different transition metal was studied for carbon disulfide(CS2) removal efficiency at ambient temperature. The effects of impregnants, adsorption temperature and regeneration performance were investigated. The adsorbents were characterized by employing N2-physical adsorption, FE-SEM and XRD. The results showed that The number of microporous of AC treated by K2CO3 significantly increased. The active sites were existed in the form of Cu2O after modified with Cu(NO3)2, and the soft acid of AC were improved, which promoted the complexation with CS2. However, silver ions were reduced to Ag0 in the surface of AC, and the complexation were lower. Activated carbon modified with K2CO3-Cu(NO3)2 (denoted as CuKAC) was found to have markedly enhanced adsorption capacity, and the adsorption capacity reached 77.32mg/g. The adsorption capacity showed high dependent on adsorption temperature. The best adsorption temperature was 20℃. CuKAC can be fully regenerated using hot nitrogen at 200℃, and the adsorption capacity remained stable even after ten cycles of regeneration.