Writer： Wu Wei，Xue Yang，Xu Jia-liang，Qian Qi，Liu Min，PU Wei-guang
Publication： China Plastics Industry. 2008, 36(7): 42-45
Abstract：The thermodynamics and dynamics for the adsorption of tea polyphenols onto polyamide under static conditions were studied，and the influence of temperature on the adsorption was also inspected．The results showed the saturation adsorption of polyamide resin was reduced by temperature rising，though the initial adsorption rate was increased，and that Freundlich and Langmuir equations could describe the spontaneous adsorption，and the adsorption was an exothermal and increasing entropy process；the process of adsorption was mainly chemical adsorption；the law of dynamics for the adsorption could be described by Langegren rate equation；the controlling step of adsorption velocity was internal-pore diffusion process．
