# Metal Mobility in Afforested Sites of an Abandoned Zn-Pb Ore Mining Area
## 3 Results
### Soil Characteristics
#### 3.1.2 Profiles from the Heap at Paryz  
Profile I at Paryz is 2.82 m deep. The 4 cm dark organic surface stratum has a very low density (0.55 g:cm\({}^{-3}\)). It is characterised by a pH\({}_{\text{KCI}}\) = 6.8. The organic matter (43.3%) and water (53%) content is higher, whereas the concentration of carbonates is lower (38.6%) in comparison with the rest of the profile. The lower levels of the profile, from 0.04 to 1.72 m, contain yellow silty sands with carbonate content which increases with depth from 73% to 97%. The soil pH values exhibit an analogous regularity, rising from 6.6 to 8.7. The bulk density of this strata is around 1 g:cm\({}^{-3}\) whereas LOI is equal to 3%. The highest carbonate content and pH values are at the depth from 0.74 to 1.72 m where fragments of dolomites were found. The deeper part of the profile (from 1.72 to 2.26 m) contains brown sands with the low content of carbonates (<1%) and organic matter (<0.25%). These strata have a relatively high density (1.1-1.3 g-cm\({}^{-3}\)), pH\({}_{\text{KCI}}\) from about 6.5 to 6.8 and the low content of water (about 5%). Under these layers, at the depth of 2.26 m, a sandy stratum about 0.3 m thick with a higher concentration of organic matter and pH\({}_{\text{KCI}}\) about 6.3 occurs (Table 2). In the deepest part of the profile (below 2.65 m), both organic matter and carbonates disappear. The Paryz II profile was sampled to the depth of 0.96 m below the heap surface (Figure 1). The dark humus top stratum is 6 cm thick. It is characterised by the LOI value of 58%, the water content of 56%, very low bulk density (0.52 g:cm\({}^{-3}\)), a pH value of 5.0 and carbonate content equal to 47.4%. Immediately below the organic layer, at depths from 0.06 to 0.34 m, there is a yellowish layer with visible crumbs of weathered dolomites in which the CaCO\({}_{3}\) concentration ranges from 86 to 88% and \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Characteristic** & **Unit** & \begin{tabular}{c} **Lgota I** \\ **(n = 16)** \\ \end{tabular} & \
\begin{tabular}{c} **Lgota II** \\ **(n = 9)** \\ \end{tabular} &
\begin{tabular}{c} **Lgota III** \\ **(n = 7)** \\ \end{tabular} \\ \hline \multicolumn{4}{c}{**bulk density**} \\ min-max & \multirow{2}{*}{[g:cm\({}^{-3}\)]} & 0.37–1.21 & 0.46–1.74 & 0.66–1.86 \\ _median_ & & 0.97 & 1.23 & 1.15 \\ (25 th; 75 th percentile) & & (0.89; 1.09) & (1.04; 1.48) & (0.89; 1.55) \\ \hline \multicolumn{4}{c}{**water content**} \\ min-max & \multirow{2}{*}{[\%]} & 6.0–54.2 & 12.4–55.1 & 13.7–62.1 \\ _median_ & & 20.1 & 23.6 & 16.6 \\ (25 th; 75 th percentile) & & (15.7; 21.6) & (16.3; 25.1) & (14.8; 53.2) \\ \hline \multicolumn{4}{c}{**LOI**} \\ min-max & \multirow{2}{*}{[\%]} & 1.19–53.40 & 0.20–57.70 & 2.02–75.30 \\ _median_ & & 2.24 & 3.50 & 2.73 \\ (25 th; 75 th percentile) & & (1.81; 3.50) & (2.47; 3.72) & (2.13; 41.90) \\ \hline \multicolumn{4}{c}{**carbonates**} \\ min-max & \multirow{2}{*}{[\%]} & 2.34–93.30 & 3.21–82.00 & 1.57–70.30 \\ _median_ & & 75.30 & 32.90 & 5.46 \\ (25 th; 75 th percentile) & & (43.85; 82.83) & (5.72; 72.10) & (3.90; 25.74) \\ \hline \multicolumn{4}{c}{**pH\({}_{\text{H2O}}\)**} \\ min-max & \multirow{2}{*}{[-]} & 6.55–9.20 & 6.68–8.29 & 6.15–8.04 \\ _median_ & & 8.87 & 7.94 & 7.52 \\ (25 th; 75 th percentile) & & (8.44; 9.02) & (7.62; 8.04) & (6.45; 7.84) \\ \hline \multicolumn{4}{c}{**pH\({}_{\text{KCI}}\)**} \\ min-max & \multirow{2}{*}{[-]} & 5.54–8.60 & 5.08–6.67 & 4.57–6.68 \\ _median_ & & 7.65 & 6.57 & 6.12 \\ (25 th; 75 th percentile) & & (7.23; 7.85) & (6.51; 6.60) & (5.36; 6.33) \\ \hline \hline \end{tabular}
\end{table} 
Table 1: The soil characteristics in the profiles from the Lgota location. pH\({}_{\rm KCl}\) from 6.7 to 7.0. Below, at a depth of 0.34 m, there are 0.3-m-thick sandy deposits in which contents of organic matter (2.0-0.3%), carbonates (58.9-0.62%) and water (18.2-0.4%) is lower while the pH is 7.0. Silty-clay deposits with a variable proportion of sand fraction compose the bottom part of the profile (0.64-0.96 m).