To investigate the kinetic data of batch adsorption of dye-component from its aqueous solution by powdered active carbon, an adsorption isotherm equation of Freundlich was determined at 24 ℃, for the range of concentration between 3×10^-4 and 3×10^-1 grams of Fuchsine per liter of solution. Applying the homogeneous diffusion model and the pore diffusion model, adsorption equilibrium and adsorption rate constant are discussed. For the powdered active carbon, the pore diffusion model might be better adapted than the other to the extent of fractional approach of equilibrium E=0.8. The pore diffusivity determined by the model agrees well with the value calculated by Wheeler's method^7）. By experimental runs at 24 ℃, 34 ℃, and 50 ℃, respectively, the activation energy of adsorption of Magenta or Fuchsine by active carbon was determined and suggested as E_A=8.61 Kcal. per gram mole of dye.