Single‐Rate Dual‐Domain Mass Transfer Model: Elucidating Temperature Effects

Abstract In this study, the influence of varying temperatures on transport behavior conservative solutes in heterogeneous porous media has been investigated. Column flow experiments employing potassium bromide as tracer were conducted at four temperature levels (3°C, 10°C, 20°C, and 30°C) measured electrical conductivity (EC) signal was interpreted through inverse modeling. Additional performed with deuterium‐enriched water 10°C 30°C. For those experiments, deuterium isotope ratios analyzed alongside anion cation concentrations. Obtained EC‐based breakthrough curves showed measurable differences both observed peak values tailing intensities that could be clearly attributed to variations experimental temperatures. The results further corroborated by corresponding anion/cation concentrations, although less pronounced. model‐based interpretation employed standard advection‐dispersion equation well three alternative variants all based single‐rate dual‐domain mass transfer (DDMT) approach, but embracing coupling between experiments. parameters determined for EC, bromide, deuterium, respectively. estimated ranges point toward a direct correlation effective DDMT rates temperature. directly follows Arrhenius relationship, is weaker than one describing dependence molecular diffusion coefficients, therefore pointing contribution non‐diffusive components.