Publication Details

Reference Category Journals
DOI / URL link
Title (Primary) Anomalous fluoride concentration in groundwater - is it natural or pollution? A stable isotope approach
Author Marimon, M.P.C.; Knöller, K.; Roisenberg, A.;
Journal Isotopes in Environmental and Health Studies
Year 2007
Department ISOHYD;
Volume 43
Issue 2
Language englisch;
Keywords Fertiliser contamination; Fluoride; Groundwater; Hydrogen-2; Nitrogen-15; Oxygen-18; Sulphur-34
Abstract Fluoride anomalies (up to 11 mg/l) have been detected in groundwater of the central region of Rio Grande do Sul State, Southern Brazil, in an area where fluorosis is endemic. Two hypotheses are investigated concerning the fluoride origin: lithochemical affiliation from regional rock or contamination by fertilisers application. These hypotheses are discussed based on the stable isotope data of water, nitrate, and sulphate, which indicates that the local precipitation is the main groundwater recharge source. The isotopic composition of groundwater sulphate is similar to that of fertiliser sulphate. However, a conclusive assignment of groundwater sulphate to fertiliser origin is not indicated because further possible sulphate sources fall into the same isotopic range. In contrast, the isotopic composition of dissolved nitrate suggests that there is no direct relationship to the use of NPK fertilisers. Hence, an origin of the high fluoride content in groundwater related to long-term rock-water interactions seems likely.
ID 2043
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=2043
Marimon, M.P.C., Knöller, K., Roisenberg, A. (2007):
Anomalous fluoride concentration in groundwater - is it natural or pollution? A stable isotope approach
Isot. Environ. Health Stud. 43 (2), 165 - 175