Geochemistry and sources of fluoride and nitrate contamination of groundwater in Lar area, south Iran

Environmental Science and Pollution Research International
Mohsen RezaeiAta Shakeri

Abstract

Groundwater quality in bone-dry and semiarid areas of Iran is decreasing because of contaminants from natural origins and anthropogenic sources. Among many harmful contaminants, nitrate and fluoride ions are more common. This study was carried out with the aim of determining geochemical processes controlling chemistry of groundwater with special reference to nitrate and fluoride enrichment in groundwater in Lar plain aquifer, south of Iran. Groundwater samples were collected from 17 sites and analyzed for main constituents (Na, K, Ca, Mg, Cl, SO42-, HCO3-, F-, and NO3-). Composite diagram, saturation indices calculation, and multivariate analysis techniques including cluster and factor analyses were employed in evaluating groundwater quality. The EC ranges from 8793.87 to 13,345.00 μS/cm in wet season and from 9621.59 to 12,640.00 μS/cm in dry season. Fluoride amounts range between 0.59 and 3.92 mg/L. Nitrate concentrations range between 1.47 and 70.66 mg/L. Results indicate that dissolution-precipitation of carbonate and evaporate minerals, evaporation (in terms of agricultural water return), and opposite ion interchange are the main processes that determine groundwater chemistry. It seems that fluoride has a natural origin an...Continue Reading

References

Jun 25, 2002·Ambio·Amir H Wolfe, Jonathan A Patz
May 18, 2004·The Science of the Total Environment·José H GarcíaSondra Sage
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Citations

Jul 9, 2020·Environmental Science and Pollution Research International·Fan FengYonghai Jiang
May 17, 2019·International Journal of Environmental Research and Public Health·Hui JiaWenhao Ren
Jan 21, 2021·Ecotoxicology and Environmental Safety·Oluwafemi Adewole AdeyeyeXiujuan Liang
Jun 23, 2018·The Science of the Total Environment·Mélida GutiérrezBertha A Rivas-Lucero
Dec 14, 2021·The Science of the Total Environment·E AbascalA Ortiz

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