Adsorption is one of the widely applied techniques for removal of hazards from aqueous solution. Its mechanism studies are of great significance to evaluate the adsorption performance and reveal the underlying mechanisms. There are several mathematic models to describe the adsorption process and diffusion mode. In recently years, more and more adsorption models with more informational parameters are investigated, which could give guidance for industrial conversion through supplying paramount importance parameters. This book is of certain significance and improvement of applied adsorption mechanism and modeling.