3.4.1. Capacity and Kinetics of resupply
The solid–liquid distribution coefficient (Kd) is an operationally
defined parameter (Degryse et al., 2009), frequently used for estimating
both ‘‘capacity’’ and ‘‘intensity’’ factors to predict the soil
metal availability. Kd is defined as the concentration in soil solid
phase (Cs) to that in the soil solution (CEDTA in this work). In the
context of this work, the solid–liquid partitioning coefficient is calculated
as follows: