engleski

One-dimensional Transport Model on Column Scale. Case study: Fluvisols Developed on Zagreb Quaternary Aquifer

The subject of this study is Fluvisol developed on the floodplain of Sava River. Goal of the study is one-dimensional transport model on column scale. The purpose of the study is better understanding of sorption and migration of selected trace elements through the soil column. Two undisturbed soil samples for each of two best developed horizons of Fluvisols (AC and C) at Kosnica water capture site (800 m from right bank of Sava River) were collected. Soil samples were installed in Plexiglas columns and irrigated continuously by metal (Pb, Zn, Cd) solution using peristaltic pump. Samples of the leachate are being collected continuously and analyzed using atomic absorption spectrometry (AAS) for determination of lead, zinc and cadmium concentrations once every two weeks. The experiment will end when concentrations of analysed metals in leachate become same as in the initial metal solution. At the end of the test, the column samples will be cut into 10 mm slices. Such soil samples will be treated by aqua regia solution and analyzed to reveal concentrations and vertical distributions of selected trace elements. Hydrus 1D software is used for modelling. Transport model shown in this paper is first version of model which will be modified after the completion of column test. Results of this model reveal time period for sampling solution at the end of outlet from column.

Fluvisol; Zagreb Quaternary aquifer; trace elements; column test; Hydrus 1D; transport model; sorption; dispersivity

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