Abstract:Effects of oxygen plasma modification on the surface properties of bamboo-based activated carbon (BAC) were investigated. The adsorption behaviors of aniline on raw and modified BACs were also examined under various experimental conditions. It was observed that the surface textural properties of modified BACs were almost unaffected, whereas their surface chemical properties changed greatly. Batch experimental results showed that the aniline adsorption efficiency of all BACs reached their peak values at solution pH beyond 5.0, the adsorption equilibrium of aniline on all BACs could be reached within 480min. The modified BACs significantly outperformed raw BAC for the adsorption of aniline. The kinetic and equilibrium data of all BACs could be best described by the pseudo-second-order model, intra-particle diffusion model and Langmuir isothermal model. Further analysis indicated that the improvements of π-π dispersive interaction and hydrogen bond effect were the possible reasons for the better aniline adsorption performance of modified BACs.