Distribution of the heavy metals in the soil and water matrix, a space-time overview from a lakes protected area

The aim of this study was to evaluate the quality of environmental factors of soil and water in a protected area in Romania, namely the Preajba-Facai lake system in Dolj County. Highlighting the evolutionary aspects of the analysed quality parameters (20 physical-chemical indicators) on a spatial-temporal scale in order to establish geochemical thresholds is the final result of a larger project. The presented results were obtained through seasonal monitoring over a period of 3 years, which involves water and soil sampling and subsequent laboratory analysis. The results obtained were interpreted in relation to the legislation in force and through a more suggestive evaluation by calculating the pollution indices: the global pollution index (IPC) for water and the Nemerov synthetic soil contamination index. Following the field visits, additional information was brought, which contributed to a good knowledge of this region. The area, although protected, is influenced by the anthropogenic factors, which have a negative impact on the environment. In some cases, non-conformities were identified and validated through the analysis performed.