摘 要: | The adsorption kinetics of Pb^2+ in rocks has been studied using ion selective electrodes and atomic absorption spectrophotometer. The results showed that the adsorption process is a fractal-like reaction. The adsorption rate was relatively high before 30 minutes, and then dropped. The saturated adsorption capacity (a) of Pb^2+ and kinetic parameters (b, a, D and k) increased with increasing initial concentrations of Pb^2+. These parameters (except a) decreased while Na^+ was present in the solution. Furthermore, the smaller the rocks were in grain size, the bigger these kinetic parameters would be, though the parameter a was almost constant.
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