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• W2768618775 abstract "Diffuse nitrate pollution in groundwater is currently considered one of the major causes of water quality degradation. Determining the sources of nitrate contamination is an important first step for a better management of water quality. Thus, the isotopic composition of nitrate (δ15NNO3 and δ18ONO3) and boron (δ11B) were used to evaluate nitrate contamination sources and to identify geochemical processes occurring in the shallow and deep aquifers of the Turin-Cuneo plain (NW Italy). The study area is essentially an agricultural zone, where use of synthetic nitrogenous fertilizers and organic manure is a common practice and the connection to sewer services is locally lacking. Also livestock farming are highly developed. A groundwater sampling campaign was performed on 34 wells in the shallow aquifer and 8 wells in the deep aquifers, to analyze nitrate, chloride, boron, δ15NNO3, δ18ONO3 and δ11B. Isotope data of nitrate indicate that nitrate contamination in the Turin-Cuneo plain originates from mixtures of synthetic and organic sources, slightly affected by denitrification, and manure or septic tank effluents. Moreover, boron isotopes were used to discriminate further among the main anthropogenic sources of pollution. The analyses results confirm that both animal manure and domestic sewage, especially under the city of Turin, can contribute to the nitrate contamination. The isotope analysis was also used for the evaluation of denitrification and nitrification processes: contrary to expectations, a significant denitrification phenomenon was assessed only in the shallow unconfined aquifer, especially in the Poirino Plateau, the most contaminated sector of the study area." @default.
• W2768618775 created "2017-12-04" @default.
• W2768618775 creator A5073860628 @default.
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• W2768618775 date "2017-11-24" @default.
• W2768618775 modified "2023-09-27" @default.
• W2768618775 title "Evaluation of sources and fate of nitrates in the western Po plain groundwater (Italy) using nitrogen and boron isotopes" @default.
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• W2768618775 doi "https://doi.org/10.1007/s11356-017-0792-6" @default.
• W2768618775 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29177999" @default.
• W2768618775 hasPublicationYear "2017" @default.
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