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| Research Domain： |
Generalized kinetic sorption model in natural wate |
| Keyword： |
Generalized kinetic sorption model in natural wate |
| Research Production： |
Many previous kinetic sorption models for natural waters treat a sorption reaction as a first order, reversible reaction. In fact chemical reaction cannot be regarded as the sole rate-limiting step since various diffusion steps could be much slower than the former steps. We have recently proposed a “generalized kinetic sorption model”, which may describe complex sorption processes when sorption is controlled by liquid film diffusion, chemical reaction, intra-particle diffusion and shell progressive diffusion (Pan, G, 1999). None of the previous models (numerical models) with less than 4 empirical parameters can describe the ‘two phase’ kinetic sorption behavior typically found in natural waters/sediments. With the generalized kinetic sorption model (analytical equation), it is possible to describe the two-phase kinetic sorption behavior with only two parameters. The generalized model can also cover many existing equations in textbooks and literatures.
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