Abstract: The adsorptive performance of commercial activated carbon fiber (ACF) for CS₂ was investigated and a comparison of the adsorptive performance of ACF with activated carbon (AC) and zeolites was made. The effects of the operating parameters such as CS₂ concentration, flux, humidity and water content in ACF on the adsorptive performance were investigated. Results indicated that the ACF had a higher adsorption capacity of 46.5% than AC and zeolites did toward CS₂. The breakthrough time decreased greatly with flow rate and CS₂ concentration. The adsorptive performance deteriorated with increasing humidity and water content in the ACF. The adsorption time was shortened by 28.6% when humidity was increased to 65%. The breakthrough time was decreased by 42.9% when water content in the ACF was increased to 45%. The adsorptive capacity was negligible when water content in the ACF was increased to over 60%.