Abstract:

Bamboo carbons were prepared by bamboo butt，bamboo burl and bamboo branch，then the bamboo activated carbons were prepared by bamboo carbons at 700 ℃ under different concentration of KOH solution by using KOH as activator，the adsorption of bamboo activated carbon with best adsorption capability to phenol was measured at different time and solution concentration，and the structure of different carbon was also characterized. The results show that the bamboo activated carbon has best adsorption capability to phenol when the concentration of KOH solution is 16.0 g·L^-1，and the bamboo butt activated carbon has best adsorption capability to phenol among the bamboo activated carbons prepared by butt，burl and branch respectively. The adsorption of bamboo butt activated carbon to phenol can reach to equilibrium when the adsorption time is within 40 min，and the adsorption capacity of bamboo butt activated carbon to phenol reaches to 83.4 mg·g^-1 which tend to saturation at 30 ℃. The porosity rate of bamboo butt carbon，bamboo burl carbon and bamboo branch carbon is 0.656，0.698 and 0.740 respectively，and the porosity rate of bamboo butt activated carbon，bamboo burl activated carbon and bamboo branch activated carbon is 0.688，0.748 and 0.790 respectively. The specific surface area of bamboo butt carbon and bamboo butt activated carbon is 110.4 and 475.7 m²·g^-1 respectively，and the pore volume is 0.09 and 0.26 mL·g^-1 respectively，the average pore size is 3.16 and 2.19 nm respectively.

Key words: bamboo carbon, bamboo activated carbon, phenol, adsorption, KOH, structure characterization