Akademik Veri Yönetim Sistemi
4th International Congress on Arsenic in the Environment - Understanding the Geological and Medical Interface (As), Cairns, Avustralya, 22 - 27 Temmuz 2012, ss.486-488, (Tam Metin Bildiri)
The naturally occurring aqueous Arsenic (As) and other toxic elements are found around the world. The present study concentrates on arsenic concentrations, speciation and related microbial diversity in a hydrothermal system in Western Turkey. The surface temperatures of hot springs reach up to 90 degrees C and deep well (reservoir) temperatures vary in the range of 40 to 230 degrees C. The elements such as As, B, Br, Ba, Cr, Fe, Mn, V and Zn are found in high concentration in hydrothermal waters. Hydrogeochemically, Seferihisar hot spring exhibited a Na-Cl water type. On the other hand, Karahayit, Pamukkale, Emirfaki, Alasehir and Sart exhibit a Ca-HCO3 water type and Citgol exhibited a Na-HCO3-SO4 water type. The arsenic (As) concentrations in geothermal waters of Western Anatolia have been detected to range from 0.03 mg/L to 1.5 mg/L, including Buharkent (Inalti) (1.50 +/- 0.005 mg/L), Kizildere (1.13 +/- 0.005 mg/L), Eynal (0.71 +/- 0.005 mg/L) and Saraykoy (0.06 +/- 0.004 mg/L). Arsenic (III) is the dominant species in geothermal water of Western Anatolia. The 16S rRNA gene sequences of bacterial diversity show that the thermophilic, sulfur/thiosulfate-oxidizing bacterium (Thiobacter subterraneus) is present in Kula geothermal water and mesophilic sulfur-and thiosulfate-oxidizing Sulfurovum lithotrophicum bacterium occurs in Saraykoy geothermal spring. Also, Bacillus fumarioli, (a thermophilic, aerobic endospore forming bacterium growing on (NH4)(2) SO4, MgSO4 and MnSO4 at 50-55 degrees C), Schlegelella thermodepolymerans and Methylocaldum szegediense are rich in geothermal water.