Abstract: A low-carbon by-products-based binder-solidified/stabilized soil was subjected to the flexible wall permeability tests to obtain the hydrodynamic dispersion parameters by periodically measuring the concentrations of nickel and zinc of the effluent. The results demonstrate that the addition of the by-products-based binder decreases the concentrations of nickel and zinc in the effluent liquid. The concentrations of heavy metals are lower than that of the original contaminated soil, and meet the requirements of IV-Grade underground water regulated by China's standard GB/T14848—2017. The hydrodynamic dispersion coefficients of nickel and zinc in the treated soil decrease by 2 order of magnitudes as compared to those of the untreated contaminated soil.