Dynamic fractionation of mercury species in soils and bottom deposits using rotating coiled columns

The possibility of using rotating coiled columns for the dynamic fractionation of mercury species in the substance analysis of soils and sediments is shown. The sequential leaching of mercury species has been carried out with the account for their specific physical and chemical properties. The comparison of the results of batch and dynamic extraction has revealed that, for the correct estimation of the concentration of the most mobile mercury species, it is preferable to use flow (dynamic) fractionation. By the example of contaminated samples of sediments and soils, the distribution of mercury between different forms has been studied. It has been demonstrated that, in the tested samples, mercury is present mainly in acid-soluble, organic, and residual (sulfide) fractions.