Although DFT is recognized for yielding more accurate interaction energies, its computational cost limits its ability to deal with diffusion processes and simulate complex SOM systems. In contrast, the coarse-grained approach employed here enables the investigation of such dynamic processes over extended time and length scales, thereby complementing previous studies and integrating into the current research framework of pollutants in soil. Moreover, the method offers broad potential applications, including studies of diverse SOM compositions, the direct incorporation of pre-parameterized molecules from the Martini 3 framework for exploring their interactions with SOM, and the examination of large-scale structural arrangements of SOM with bio-macromolecules, such as proteins, lipids, or carbohydrates.