Adequacy of transport parameters obtained in soil column experiments for selected chemicals

摘要: The transport parameters were determined for the 18O isotope (in form of H218O), Br− ion, and atrazine in intact columns allophanic Andosol (Mexico State, Mexico). A one-dimensional model convective-dispersive chemicals with account decomposition equilibrium adsorption (HYDRUS-1D), which is widely applied assessing risk chemical bacterial contamination natural waters, was used. obtained by solving inverse problem on basis laboratory experiments isotope, soil at a fixed filtration velocity. hydrodynamic dispersion ions one column same order magnitude, those higher 3–4 times. used to calculate these substances another different values water content process adequately described only isotope. In case significantly underestimated velocity; atrazine, its peak concentration overestimated. study three compounds showed that could not be reliably predicted from results single experiment, even when several this experiment.