Arsenic Pollution in the Groundwater of Simav Plain, Turkey: Its Impact on Water Quality and Human Health

In this research, geological and hydrogeological studies were conducted to determine the source of high arsenic levels in the surficial aquifer of Simav Plain, Kutahya, Turkey. One of the two aquifer systems isolated in the study area was a deep confined aquifer composed of fractured metamorphic rocks that supply hot geothermal fluid. The other one was an unconfined alluvial aquifer, which developed within the graben area as a result of sediment deposition from the highlands. This aquifer serves as the primary water resource within the plain. A water quality sampling campaign conducted in 27 wells drilled in the surficial aquifer has yielded an average arsenic concentration of 99.1 µg/L with a maximum of 561.5 µg/L. Rock and sediment samples supported the fact that local metamorphic rocks contained significant amounts of sulfur minerals where arsenic-containing lenses are present inside. It was also determined that a Cu–Pb–Zn mine was operated in the past in the same formation. Arsenic-containing wastes of this mine were deposited near the Simav district center in an uncontrolled manner. This mined formation had arsenic levels reaching to levels as high as 660 mg/kg, which was found out to be the highest arsenic level in the area. Another potential arsenic source in the study area was the geothermal fluid that was used extensively in three geothermal fields with levels reaching to levels as high as 594 µg/L. Uncontrolled discharges of waste geothermal fluid and overexploitation of groundwater were also found to contribute to arsenic pollution in surface/subsurface waters of the plain. Thus, natural sources and anthropogenic influences of arsenic were found to create high concentrations in local water reserves of the area and influence human health. Consequently, death statistics from the 1995 to 2005 period collected from the area has revealed increased rates of gastrointestinal cancers above Turkish average.

[1]  G. Seyitoğlu,et al.  The Simav Graben: An example of Young E_W Trending Structures in the Late Cenozoic Extensional system of Western Turkey , 1997, Turkish Journal of Earth Sciences.

[2]  J. Guilbert,et al.  The geology of ore deposits , 1985 .

[3]  D. Chakraborti,et al.  Arsenic in ground water in six districts of West bengal, India: the biggest arsenic calamity in the world. Part 2. Arsenic concentration in drinking water, hair, nails, urine, skin-scale and liver tissue (biopsy) of the affected people. , 1995, The Analyst.

[4]  F. Ahmed,et al.  Distribution of arsenic and other trace elements in the Holocene sediments of the Meghna River Delta, Bangladesh , 2006 .

[5]  S. Flanagan,et al.  Arsenic in groundwater in eastern New England: occurrence, controls, and human health implications. , 2003, Environmental science & technology.

[6]  O. Gunduz,et al.  Mechanisms of arsenic contamination of a surficial aquifer in Turkey. , 2008 .

[7]  A. Fritzsche,et al.  Arsenic fixation on iron-hydroxide-rich and plant litter-containing sediments in natural environments , 2006 .

[8]  Sabina C. Grund,et al.  Arsenic and Arsenic Compounds , 2008 .

[9]  A. Smith,et al.  Cancer risks from arsenic in drinking water. , 1992, Environmental health perspectives.

[10]  J. Manteca,et al.  Sulphide-mining impacts in the physical environment: Sierra de Cartagena–La Unión (SE Spain) case study , 2006 .

[11]  Ü. Gemici,et al.  Hydrogeochemistry of the Simav geothermal field, western Anatolia, Turkey , 2002 .

[12]  O. Gunduz,et al.  IWQ Index: A GIS-Integrated Technique to Assess Irrigation Water Quality , 2007, Environmental monitoring and assessment.

[13]  J. W. Ball,et al.  Chemical analyses of hot springs, pools, geysers, and surface waters from Yellowstone National Park, Wyoming, and vicinity, 1974-1975 , 1998 .

[14]  M. Thirlwall,et al.  Arsenic in groundwater: Testing pollution mechanisms for sedimentary aquifers in Bangladesh , 2001 .

[15]  A. Mukherjee,et al.  Hydrogeological investigation of ground water arsenic contamination in south Calcutta. , 1999, The Science of the total environment.

[16]  A. Smith,et al.  Arsenic in drinking water and the prevalence of respiratory effects in West Bengal, India. , 2000, International journal of epidemiology.

[17]  M. Çolak,et al.  The Effects of Colemanite Deposits on the Arsenic Concentrations of Soil and Ground Water in Igdeköy-Emet, Kütahya, Turkey , 2003 .

[18]  Dennis R. Helsel,et al.  A Retrospective Analysis on the Occurrence of Arsenic in Ground-Water Resources of the United States and Limitations in Drinking-Water-Supply Characterizations , 2000 .

[19]  J. Loredo,et al.  Geochemical assessment of an arsenic mine adjacent to a water reservoir (León, Spain) , 2006 .

[20]  Kyoung-Woong Kim,et al.  Human risk assessment of As, Cd, Cu and Zn in the abandoned metal mine site , 2005, Environmental geochemistry and health.

[21]  R. Benson,et al.  Health effect levels for risk assessment of childhood exposure to arsenic. , 2004, Regulatory toxicology and pharmacology : RTP.

[22]  D. Chakraborti,et al.  ARSENIC IN GROUNDWATER IN SEVEN DISTRICTS OF WEST BENGAL, INDIA : THE BIGGEST ARSENIC CALAMITY IN THE WORLD , 1996 .

[23]  Niyazi Aksoy,et al.  Groundwater contamination mechanism in a geothermal field: a case study of Balcova, Turkey. , 2009, Journal of contaminant hydrology.

[24]  Suiling Wang,et al.  Occurrence of arsenic contamination in Canada: sources, behavior and distribution. , 2006, The Science of the total environment.

[25]  A. Şengör,et al.  Timing of tectonic events in the Menderes Massif, Western Turkey - Implications for tectonic evolution and evidence for Pan-African basement in Turkey , 1984 .

[26]  J. Hem.  Study and Interpretation of the Chemical Characteristics of Natural Water , 1989 .

[27]  A. Şengör,et al.  Strike-Slip Faulting and Related Basin Formation in Zones of Tectonic Escape: Turkey as a Case Study , 1985 .

[28]  S. A. Tarafdar,et al.  Arsenic in drinking water and in scalp hair by EDXRF: A major recent health hazard in Bangladesh , 2003 .

[29]  J. Hering,et al.  Rapid Oxidation of Geothermal Arsenic(III) in Streamwaters of the Eastern Sierra Nevada , 1998 .

[30]  C. Jang,et al.  Occurrence of arsenic in ground water in the Choushui River alluvial fan, Taiwan. , 2006, Journal of environmental quality.

[31]  D. Chakraborti,et al.  Environmental pollution and chronic arsenicosis in south Calcutta. , 1992, Bulletin of the World Health Organization.

[32]  R. Stauffer,et al.  Arsenic and antimony in geothermal waters of Yellowstone National Park, Wyoming, USA , 1984 .

[33]  Jerzy Jankowski,et al.  The source of naturally occurring arsenic in a coastal sand aquifer of eastern Australia. , 2007, The Science of the total environment.