Multi-isotope approach for the identification and characterisation of nitrate pollution sources in the Marano lagoon (Italy) and parts of its catchment area

Saccon, P., Leis, A., Marca, A., Kaiser, J., Campisi, L., Böttcher, M. E., Savarino, J., Escher, P., Eisenhauer, Anton and Erbland, J. (2013) Multi-isotope approach for the identification and characterisation of nitrate pollution sources in the Marano lagoon (Italy) and parts of its catchment area Applied Geochemistry, 34 . pp. 75-89. DOI 10.1016/j.apgeochem.2013.02.007.

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Abstract

A multi-isotope approach has been used in the Marano lagoon (NE Italy) and parts of its catchment area to identify causes of increased NO3- pollution. The hydrogeochemical features of different water types and potential sources of NO3- were characterized using the isotopic composition of NO3- (delta N-15, delta O-18, and Delta O-17) and other source-related species such as B (delta B-11), water (delta H-2 and delta O-18) and SO42- (delta S-34 and delta O-18). Water samples from the lagoon, its tributary rivers, the groundwater up-welling line, groundwater, sewer pipes, and open sea water have been collected at quarterly intervals in the years 2009-2010. The results indicate that the NO3- load in the lagoon was not only derived from agricultural activities but also from other sources such as urban waste water, in situ nitrification and atmospheric deposition. The delta S-34 signature in the lagoon clearly denotes the largely prevailing origin of aqueous SO42- from seawater, and practically points to the absence of any appreciable redox process involving S species in the lagoon. It also supports the existence of a connection between the lagoon and the nearby Tagliamento river

Document Type: Article
Additional Information: WOS:000320769200007
Keywords: Nitrate pollution sources, Marano Lagoon, Italy
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
Refereed: Yes
DOI etc.: 10.1016/j.apgeochem.2013.02.007
ISSN: 0883-2927
Projects: Future Ocean
Date Deposited: 28 Aug 2013 08:02
Last Modified: 04 Dec 2017 13:45
URI: http://eprints.uni-kiel.de/id/eprint/21936

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