Correlation Analysis Among Selected Parameters of N Transformation in Kovin-Dubovac
2018
Perović, Marija (Jaroslav Černi Institute for the Development of Water Resources, Belgrade (Serbia)) | Obradović, Vesna (Jaroslav Černi Institute for the Development of Water Resources, Belgrade (Serbia)) | Petković, Anđelka (Jaroslav Černi Institute for the Development of Water Resources, Belgrade (Serbia)) | Vučković, Tanja (Jaroslav Černi Institute for the Development of Water Resources, Belgrade (Serbia)) | Obrovski, Boris (Faculty of Technical Sciences, Novi Sad (Serbia)) | Dimkić, Milan (Jaroslav Černi Institute for the Development of Water Resources, Belgrade (Serbia))
Knowledge of the complex cycle of nitrogen transformation in soil and groundwater is of great importance, especially in aquifers that can potentially be used as sources of drinking water. Predicting the fate and therefore the final form of produced nitrogen compounds in specific groundwater environments provides an assessment of the impact of certain nitrogen sources on groundwater quality. The obtained results emphasize the importance of knowing concentration trends and relations of influential compounds in predicting the fate of applied fertilizers in anoxic groundwater in agricultural areas. In this paper we have identified the mutual interdependence and correlation strength between selected factors which are considered as dominant in the transformation of N compounds in anoxic groundwater. Applied Principal Component Analysis (PCA) and Cluster Analysis (CA) for 9 physico-chemical and microbiological parameters in 14 facilities (wells and connected piezometers) for anoxic alluvial groundwater from Kovin-Dubovac revealed 4 main factors, which explain 84,18% of overall variance. Statistical analysis demonstrated the existence of a strong correlation between redox potential (Eh), sulfide concentration (H 2 S) and the number of iron related bacteria (IRB); between ammonium concentration (NH4 +), sulfate reducing (SRB) and denitrificating bacteria (DN); and between ferrous iron (Fe 2+) and total organic carbon (TOC) concentration.
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