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Title: Naturally occurring arsenic in terrestrial geothermal systems of western Anatolia, Turkey: Potential role in contamination of freshwater resources
Authors: Bundschuh, Jochen
Maity, Jyoti Prakash
Nath, B.
Baba, Alper
Gündüz, Orhan
Kulp, Thomas R.
Jean, Jiin-Shuh
Kar, Sandeep
Yang, Huai-Jen
Tseng, Yujung
Bhattacharya, Prosun
Chen, Chienyen
Keywords: Arsenic
Environmental contamination
Geothermal wells
Hot springs
Issue Date: Nov-2013
Publisher: Elsevier Ltd.
Source: Bundschuh, J., Maity, J.P., Nath, B., Baba, A., Gündüz, O., Kulp, T.R., Jean, J.S., Kar, S., Yang, H.J., Tseng, Y.J., Bhattacharya, P., and Chen, C.Y. (2013). Naturally occurring arsenic in terrestrial geothermal systems of western Anatolia, Turkey: Potential role in contamination of freshwater resources. Journal of Hazardous Materials, 262, 951-959. doi:10.1016/j.jhazmat.2013.01.039
Abstract: Arsenic (As) contamination in terrestrial geothermal systems has been identified in many countries worldwide. Concentrations higher than 0.01mg/L are detrimental to human health. We examined potential consequences for As contamination of freshwater resources based on hydrogeochemical investigations of geothermal waters in deep wells and hot springs collected from western Anatolia, Turkey. We analyzed samples for major ions and trace element concentrations. Temperature of geothermal waters in deep wells showed extreme ranges (40 and 230°C), while, temperature of hot spring fluids was up to 90°C. The Piper plot illustrated two dominant water types: Na-HCO3 - type for geothermal waters in deep wells and Ca-HCO3 - type for hot spring fluids. Arsenic concentration ranged from 0.03 to 1.5mg/L. Dominance of reduced As species, i.e., As(III), was observed in our samples. The Eh value ranged between -250 and 119mV, which suggests diverse geochemical conditions. Some of the measured trace elements were found above the World Health Organization guidelines and Turkish national safe drinking water limits. The variation in pH (range: 6.4-9.3) and As in geothermal waters suggest mixing with groundwater. Mixing of geothermal waters is primarily responsible for contamination of freshwater resources and making them unsuitable for drinking or irrigation.
ISSN: 0304-3894
Appears in Collections:Civil Engineering / İnşaat Mühendisliği
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Sürdürülebilir Yeşil Kampüs Koleksiyonu / Sustainable Green Campus Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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