Hrvatske vode, Vol. 33 No. 131, 2025.
Original scientific paper
Determining total nitrogen in surface waters
Anita Ptiček Siročić
orcid.org/0000-0001-6243-4638
; Sveučilište u Zagrebu, Geotehnički fakultet, Varaždin, Hrvatska
*
Nina Martinez
; Sveučilište u Zagrebu, Geotehnički fakultet, Varaždin, Hrvatska
Dijana Begić Šinjori
; Zavod za javno zdravstvo, Varaždin, Hrvatska
* Corresponding author.
Abstract
Nitrogen (N₂) is a key nutrient for ecosystem functioning and one of the main limiting factors for its productivity. However, its excessive input, particularly due to anthropogenic activities, can cause adverse consequences, such as soil acidification, eutrophication and reduced biodiversity. High nitrogen concentrations in surface waters are often associated with agricultural and urban sources of pollution. In this study, surface water samples from the Varaždin and Krapina-Zagorje Counties in the period from November 2022 to April 2023 were analysed. The results showed that total nitrogen values were in accordance with regulations at 14 locations, with concentrations in excess of 2.40 mg/L N at the remaining locations, which indicates a possible anthropogenic impact.
Keywords
Surface waters, nitrogen, total nitrogen, water quality
Hrčak ID:
339879
URI
Publication date:
2.4.2025.
Visits: 0 *