Phosphorus Sorption Kinetics in Reclaimed Lignite Mine Soils under Different Age Stands of Robinia pseudoacacia L. in Northeast Germany

Table 2

Tested kinetics equations for measured P (de)sorption kinetics.

Model	Equation	Parameters
Elovich		α—initial P (de)sorption constant [mg P kg^−1 min^−1]; β—P (de)sorption rate constant [mg P kg^−1]
Parabolic		—diffusion rate constant
Exponential		—P (de)sorption magnitude constant [mg P kg^−1 min^−1]; —(de)sorption rate constant

and are the amount of P (de)sorption (mg P kg⁻¹) at initial time and at time , respectively.