Since kinetic results demonstrates that the adsorption behavior of DY-161 taken up by the bamboo active carbons followed multiple kinetic orders well, the Weber-Morris intra-particle diffusion model thereby was employed to verify the influence of mass transfer resistance on the binding of DY-161 to four adsorbents. The intra-particle diffusion plot for the sorption of DY-161 dye was shown in Fig. 7.