Solute transport analysis of bromide, uranin and LiCl using breakthrough curves from aquifer sediment

摘要: Abstract The transport behavior of lithium, uranin, bromide and chloride was studied in column experiments using sediment from an unconfined aquifer at the Krauthausen test site. Sorption isotherms were determined batch experiments. In addition, a sorption/desorption isotherm uranin determined. Inverse parameter estimation asymptotic analysis solute processes used to interpret measured BTCs. log transformed BTCs showed linear decrease tailing part with time. Depending on shape tail BTCs, CDE retardation or mobile/immobile model adjusted successfully. Measured described either hysteretic Freundlich sorption kinetic sorption. one provided evidence for presence nonlinear nonequilibrium discrimination identification different types based large extent analysis. However, few did not provide information process because concentrations fell below detection limit before convergence solutions could be observed. For none these cases, models analyzed this work able describe complete (including tail). two showing hysteresis, observed predicted data independent measurements almost without fitting. Only slight modification distribution coefficient needed case. Lithium by Field qualitatively similar as Evaluation slope log–log field suggested that may model.