Fatma AKSEVER, Ayşen DAVRAZ, Remzi KARAGÜZEL

Determination of stable isotope characteristics and natural radioactivity in drinking waters in Sandıklı basin (Afyonkarahisar-Turkey)

The Sandıklı basin is located in the southwestern part of Turkey. In thispaper, groundwater stable isotope analyzes were evaluated tounderstand the recharge of the aquifer system in the Sandıklı basin. Forthis, samples of groundwater were collected for two periods in 2009-2010 years and the stable isotope and natural radioactivity analyzeswere made in the basin. The δ 18 O and δ 2 H contents of groundwaters inthe region range from -8.08 to -10.77‰ and from-52.44 to -69.53‰,respectively. The stable isotope data lie generally above the GlobalMeteoric Water Line and waters are meteoric origin. The tritiumcontent of the groundwaters ranges from 0.00 to 4.20 TU in dry periodand from 0.30 to 5.40 TU in rainy period, respectively. These δ 3 H valuesof waters could be represented that this waters are deep aquifer watersand slow circulation. The determination of the natural radioactivity ingroundwater is important in terms of human health. The gross alphaand gross beta radioactivity concentrations of waters varied between29-162 mBq L −1 and 70-330 mBq L −1 , respectively. The results haveshown that gross α and ß radioactivity concentrations in drinkingwaters in the basin are relatively low and suitable the World HealthOrganization regulations for drinking water.

Sandıklı havzası (Afyonkarahisar-Türkiye) içme sularında doğal radyoaktivite ve duraylı izotop özelliklerinin belirlenmesi

Sandıklı havzası Türkiye'nin güneybatısında yeralmaktadır. Bu makalede, Sandıklı havzasındaki akifer sisteminin beslenimini anlamak için yeraltısuyu duraylı izotop analizleri değerlendirilmiştir. Bu amaçla, havzada 2009-2010 yıllarında iki dönem boyunca yeraltısuları örnekleri toplanmış ve duraylı izotop ile doğal radyoaktivite analizleri yapılmıştır. Bölgedeki yeraltısularının δ 18 O ve δ 2 H içerikleri sırasıyla ‰-8.08 ile ‰-10.77 ve ‰-52.44 ile ‰-69.53 arasındadır. Duraylı izotop verileri genellikle Küresel Meteorik Su Doğrusu üzerindedir ve sular meteorik kökenlidir. Yeraltısularının trityum içeriği kurak dönemde 0.00-4.20 TU ve yağışlı dönemde 0.30-5.40 TU arasındadır. Trityum içeriğine göre yeraltısuları derin akifer ve yavaş dolaşımı göstermektedir. Yeraltısularındaki doğal radyoaktivitenin belirlenmesi insan sağlığı açısından önemlidir. Suların toplam alfa ve beta radyoaktivite konsantrasyonları 29-162 mBq L −1 ve 70-330 mBq L −1 arasında değişmektedir. Havzadaki içme sularında toplam α ve ß radyoaktivite konsantrasyonları nispeten düşük ve Dünya Sağlık Örgütü'nün içme suyu kriterlerine uygundur.

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