A adsorption-desorption model considering the attenuation of adsorption capacity during non-equilibrium flow in porous media was established based on the nonlinear non-equilibrium model.Firstly,the effects of attenuation pa-rameters for initial adsorption and desorption processes,as well as the desorption ratio were analyzed.Secondly,the numerical calculations of the adsorption history model,nonlinear non-equilibrium model,and linear non-equilibrium model were compared and analyzed.The results show that the peak concentration of the adsorption history model is the highest at each position,followed by the nonlinear non-equilibrium model,and the peak concentration of the linear non-equilibrium model is the lowest.The adsorption capacity of the adsorption history model is the weakest,followed by the nonlinear non-equilibrium model,and the adsorption capacity of the linear non-equilibrium model is the stron-gest.With the increase of distance and time,the concentration difference among the three models will become larger.The peak concentration of the adsorption history model appears earliest,followed by the nonlinear non-equilibrium model,and the peak concentration of the linear non-equilibrium model appears latest.Finally,the comparison and a-nalysis of suspended particle breakthrough experiments and numerical simulation results are carried out,and the results are in good agreement,indicating that the proposed model can better reflect the migration of actual pollutants.
维普
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