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Zmienność zawartości pierwiastków śladowych w osadach ściekowych wybranych oczyszczalni ścieków w Polsce

Kostrz-Sikora Paulina

Przegląd Geologiczny

2024

Vol. 72, nr 7

308--324

Environmental policy places great emphasis on the implementation of a circular economy model, in which products and raw materials should remain in circulation for as long as possible and waste generation should beminimized as much as possible. The starting point for the effectiveness of these measures is the identification of opportunities for optimal use of both: raw materials and waste based on knowledge of their chemical composition. In the area of sewage sludge management, most research work to date has focused on investigating its fertilizer value (nitrogen, phosphorus), identifying the composition of organic matter and the content of heavy metals, primarily cadmium, copper, nickel, lead, zinc, mercury and chromium. The occurrence of other trace elements has been studied to a limited extent. Meanwhile, such studies could not only expand the body of information in environmental geochemistry with new data, but could also beusedin the analysis of environmental pressures associated with sewage sludge recovery and disposal processes. In the aspect of the environmental use of sewage sludge, especially in agriculture and for land reclamation, more complete data on the chemical composition of sewage sludge, and thus on the potential pollutant load contained in it, could be useful for decision-making and the implementation of solutions to maintaining the chemical balance and biodiversity of soil ecosystems. This article presents information on the occurrence of 1 7 trace elements determined in 49 sewage sludge samples from different wastewater treatment plants from Poland, both in terms of the types of wastewater treated and the technological processes used.