## 3 Results and Discussion
### Data Focus
In any case, the overall analysis of all Arsenic values reveals that the sediment content is in line with the concentrations generally found in soils, where it ranges between 1 and 70 mg/kg [57], with an average of 10 mg/kg [58]. Concerning the sediments sampled at the Camastra reservoir, except for Cobalt in samples C_S3, C_S4, C_S8, C_S9, and C_S11, no sediments samples exceeded the regulatory limits. This metal is high in iron-magnesium minerals, common in basic and ultra-basic magmatic rocks; in contrast, it is shallow in acidic magmatic rocks. In rocks of a sedimentary nature that characterize the catchment area, the Cobalt content is also related to the origin materials [58]. Generally, the values found for all samples are in the range commonly assumed for soils worldwide, between 1 and 40 mg/kg, with an average value of about 8 mg/kg, depending on the soil-originating material. The element tends to concentrate in soil horizons rich in organic substance, showing remarkable similarity with Fe and Mn oxides, to which it binds in practically insoluble forms. In addition, the presence of Cobalt in the Camastra lake environment is linked to the presence of non-ferrous metal smelters, in which coal combustion and road traffic are less critical. However, higher values have been found in soils along high-traffic roads [57]. \begin{table}
\begin{tabular}{c c c c c c c c c} \hline
**Heavy Metal** & **Al** & **As** & **Ba** & **Be** & **Cd** & **Co** & **Cr** & **Cu** & **Fe** \\ LoQ & 1000 & 1 & 5 & 0,1 & 0,1 & 1 & 5 & 5 & 2000 \\ \hline C\_B1 & 37,581.2 & 4.6 & 119.4 & 1.1 & 0.1 & 12.4 & 54.2 & 30.3 & 39,187.6 \\ C\_B2 & 40,871.0 & 4.0 & 121.8 & 1.2 & 0.1 & 14.8 & 59.4 & 29.9 & 40,780.2 \\ C\_B3 & 48,045.8 & 3.8 & 147.2 & 1.6 & 0.1 & 13.4 & 70.0 & 30.3 & 38,313.2 \\ C\_B4 & 53,527.2 & 4.9 & 158.0 & 1.7 & 0.1 & 14.4 & 79.4 & 34.1 & 44,934.7 \\ C\_S1 & 21,926.3 & 8.6 & 199.6 & 0.8 & 0.1 & 9.5 & 34.5 & 20.4 & 29,376.4 \\ C\_S2 & 38,380.4 & 5.0 & 230.3 & 1.1 & 0.2 & 13.8 & 51.5 & 29.3 & 37,226.9 \\ C\_S3 & 34,730.2 & 15.6 & 246.2 & 1.2 & 0.1 & **30.4** & 67.1 & 36.2 & 48,071.5 \\ C\_S4 & 44,641.4 & 12.3 & 190.6 & 1.6 & \textless{}0.1 & **29.4** & 58.9 & 41.0 & 59,583.3 \\ C\_S5 & 37,557.6 & 5.3 & 138.3 & 1.4 & 0.1 & 16.4 & 60.6 & 33.1 & 43,019.8 \\ C\_S6 & 34,735.1 & 5.0 & 131.4 & 1.1 & 0.1 & 14.5 & 55.4 & 29.9 & 40,824.3 \\ C\_S7 & 31,151.0 & 5.2 & 120.3 & 1.2 & 0.2 & 13.1 & 56.9 & 29.7 & 34,338.0 \\ C\_S8 & 45,757.3 & 13.8 & 130.3 & 1.6 & \textless{}0.1 & **26.0** & 60.6 & 31.6 & 63,154.5 \\ C\_S9 & 44,455.7 & 9.9 & 163.9 & 1.8 & 0.1 & **31.7** & 56.1 & 37.4 & 66,448.9 \\ C\_S10 & 37,070.1 & 8.6 & 145.5 & 1.2 & 0.1 & 19.4 & 65.4 & 26.7 & 46,740.1 \\ C\_S11 & 45,483.0 & 5.7 & 134.9 & 1.7 & 0.1 & **28.2** & 66.0 & 42.8 & 54,386.9 \\ C\_S12 & 33,674.0 & 4.6 & 120.2 & 1.1 & 0.1 & 13.2 & 49.0 & 26.7 & 35,444.9 \\ C\_S13 & 26,931.8 & 6.3 & 111.5 & 0.9 & 0.1 & 14.2 & 44.1 & 24.4 & 43,496.8 \\ Limit value & n.a. & 20 & n.a. & 2 & 2 & 20 & 150 & 120 & n.a. \\ \hline
**Heavy Metal** & **Hg** & **Mn** & **Ni** & **Pb** & **Sb** & **Se** & **Tl** & **V** & **Zn** \\ LoQ & 0.1 & 20 & 1 & 1 & 0.1 & 1 & 0.1 & 5 & 5 \\ \hline C\_B1 & \textless{}0.1 & 902.0 & 35.4 & 10.0 & 0.2 & 1.4 & 0.2 & 59.3 & 73.4 \\ C\_B2 & \textless{}0.1 & 800.6 & 40.4 & 13.6 & 0.2 & 1.6 & 0.3 & 64.7 & 81.1 \\ C\_B3 & \textless{}0.1 & 751.6 & 43.4 & 12.6 & 0.2 & 2.4 & 0.3 & 76.7 & 82.4 \\ C\_B4 & \textless{}0.1 & 930.6 & 40.7 & 12.8 & 0.2 & 1.8 & 0.3 & 86.7 & 97.1 \\ C\_S1 & \textless{}0.1 & 834.5 & 28.7 & 11.4 & 0.3 & \textless{}1 & 0.2 & 35.6 & 67.6 \\ C\_S2 & \textless{}0.1 & 1101.5 & 47.1 & 12.1 & 0.3 & 1.4 & 0.2 & 53.6 & 79.8 \\ C\_S3 & \textless{}0.1 & 1562.2 & 66.4 & 30.9 & 0.4 & 2.3 & 0.2 & 63.6 & 87.5 \\ C\_S4 & \textless{}0.1 & 1067.9 & 52.7 & 18.9 & 0.3 & 2.3 & 0.2 & 60.8 & 106.0 \\ C\_S5 & \textless{}0.1 & 864.8 & 46.7 & 14.6 & 0.3 & 2.4 & 0.2 & 65.4 & 87.1 \\ C\_S6 & \textless{}0.1 & 968.0 & 35.0 & 10.4 & 0.2 & 1.5 & 0.2 & 61.4 & 77.3 \\ \hline \end{tabular} Note: LoQ = Limit of Quantification; n.a. = not available.  
\end{table}