Hrvatske vode, Vol. 31 No. 126, 2023.
Original scientific paper
Seasonal variations of total organic carbon (TOC) concentrations in the surface waters of Kopački rit as part of the Naturavita project for the July 2021-June 2022 period
Hrvoje Sučić
; Nastavni zavod za javno zdravstvo Osječko-baranjske županije Drinska 8, Osijek, Hrvatska
Ivan Damjanović
; Nastavni zavod za javno zdravstvo Osječko-baranjske županije Drinska 8, Osijek, Hrvatska
Marika Kralj
; Nastavni zavod za javno zdravstvo Osječko-baranjske županije Drinska 8, Osijek, Hrvatska
Danijela Bezik
; Nastavni zavod za javno zdravstvo Osječko-baranjske županije Drinska 8, Osijek, Hrvatska
Dario Kolarić
; Nastavni zavod za javno zdravstvo Osječko-baranjske županije Drinska 8, Osijek, Hrvatska
Mirna Habuda-Stanić
; Sveučilište Josipa Jurja Strossmayera u Osijeku Prehrambeno-tehnološki fakultet Osijek Franje Kuhača 18, Osijek, Hrvatska
Nataša Turić
; Nastavni zavod za javno zdravstvo Osječko-baranjske županije Drinska 8, Osijek, Hrvatska
Snježana Benkotić
; Nastavni zavod za javno zdravstvo Osječko-baranjske županije Drinska 8, Osijek, Hrvatska
Barbara Petrovicky Šveiger
; Nastavni zavod za javno zdravstvo Osječko-baranjske županije Drinska 8, Osijek, Hrvatska
Ines Ruškan
; Nastavni zavod za javno zdravstvo Osječko-baranjske županije Drinska 8, Osijek, Hrvatska
Abstract
Total organic carbon (TOC) plays an important role in the carbon cycle and in biological, geological and physico-chemical reactions that take place in surface waters. Seasonal changes in TOC concentrations in the water column are affected by organic matter intake through soil leaching and algal blooms, hydrological transport, flow, heat exchange among water layers and biological decomposition, which is controlled by temperature, light and nutrients. The goal of the paper is to show the values through seasonal variations obtained by using the high temperature catalytic oxidation method to measure the concentrations of total organic carbon (TOC) in surface water samples of the Nature Park Kopački rit. As part of the Naturavita project, a total of 226 samples collected at 19 different locations in the period from July 2021 to June 2022 were processed. The measured TOC values ranged from 2.6 to 140 mg C/l. The 50th percentile values for the TOC indicator ranged from 3.05 to 16.5 mg C/l. Based on the obtained TOC values, the lower values were recorded mostly during winter months, while the higher ones were observed in autumn, spring and summer months due to high summer temperatures leading to an increase in the amount of carbon that can be washed away and contribute to a greater increase in TOC during summer and autumn months compared to winter and spring.
Keywords
Total organic carbon, seasonal changes, surface waters, Nature Park Kopački rit, Naturavita
Hrčak ID:
317961
URI
Publication date:
31.12.2023.
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