Fatma Çevik

An assessment of metal pollution in surface sediments of Seyhan dam by using enrichment factor, geoaccumulation index and statistical analyses

The aim of this study was to determine if high concentrations of any heavy metals exist in the sediment of Seyhan Dam reservoir to be considered toxic to the aquatic environment. Surface sediment samples from five stations in the Seyhan dam were collected quarterly from 2004 to 2005 and examined for metal content (Cr, Zn Cu, Mn, Cd, Fe, Ca, K, and Na), organic matter, and grain size. Correlation analyses showed that metal content of Seyhan dam sediment was affected by organic matter and grain size. The results have been compared with values given in the literature. The evaluation of the metal pollution status of the dam was carried out by using the enrichment factor and the geoaccumulation index. A comparison with sediment quality guideline values has also been made. Based on the enrichment factor, dam sediments were treated as a moderately severe enrichment with Cd and minor enrichment with Cr and Mn. The results of geoaccumulation index reveal that sediments of Seyhan Dam were strongly polluted in stations 1, 2, 4, and 5, and were moderately polluted in station 3 with Cd. Moreover, Cd and Cr concentrations in the sediments were above TECs except ERL for Cd.

Macrobenthic assemblages of newly introduced Caulerpa taxifolia from the Eastern Mediterranean coast of Turkey.

Caulerpa taxifolia is one of the most important and best-studied alien species in the Mediterranean Sea. The present study reveals the macrobenthic assemblages associated with C. taxifolia from the region. We found 26 species from Polychaeta, 31 species from Crustacea, 22 species from Mollusca and 5 species from Echinodermata. In conclusion, C. taxifolia in İskenderun Bay can be considered an ecosystem engineer that modifies local habitats and also enhances biodiversity.

Determination of pharmaceutical active compounds in Ceyhan River, Turkey: Seasonal, spatial variations and environmental risk assessment

ABSTRACT Pharmaceutical pollution has gained attention with the development of analytical technology. The occurrence of 91 pharmaceutically active compounds from variety of drug groups including pain killers, antimicrobials, cardiovascular drugs, hypolipidemic drugs, central nervous system drugs, and stimulants was investigated in Ceyhan River, Turkey. Pharmaceutically active compounds were examined at 9 stations, seasonally during the periods of September 2013–August 2014. For the pharmaceutically active compound analysis, solid phase extraction (SPE) method was used and measured by using liquid chromatography tandem mass spectrometry (LC-MS/MS). Highest measured pharmaceutically active compound concentration was caffeine (4880.00 ng/L). Other high concentrated pharmaceuticals were diazepam (374.00 ng/L), gabapentin (355.00 ng/L), lidocaine (48.70 ng/L), etodolac (47.35 ng/L), metoprolol (43.60 ng/L), carbamazepine (24.25 ng/L), diclofenac (17.60 ng/L), and fluconazole (15.95 ng/L). Carbamazepine and lidocaine were the most frequently detected pharmaceutics in the river water. The results of risk assessment shows that risk quotient values (RQs) is lower than 0.01, except sertraline, which means that most of the detected pharmaceutically active compounds pose no environmental risk to aquatic environment in Ceyhan River. However, it is not possible to give precise information about the effects of all detected pharmaceutically active compounds when they behave together in the aquatic environment.

Ceyhan Nehri (Adana-Türkiye)'nin farklı bölgelerinden yakalanan Afrika kedi balığı (Clarias gariepinus Burchell, 1822)’nda su kalitesinin bazı hematolojik parametreler üzerine etkisi

Bu calisma, Ceyhan Nehri’nin evsel, mezbaha ve endustriyel atiklarinin desarj kaynaklarinin yakininda bulunan bolge ile ayni nehir uzerindeki Aslantas Baraji’nin kret alti bolgesinde gerceklestirilmistir. Calismada, su kalitesinin durumu ve bu durumun Afrika kedibaligi ( Clarias gariepinus Burchell, 1822)’ndaki bazi hematolojik parametreler uzerindeki etkileri belirlenmistir. Arastirma, Ceyhan Nehri uzerindeki Aslantas baraji’nin kret alti bolgesi (istasyon I) ile ayni Nehrin evsel, tarimsal ve endustriyel atiklarin mevcut oldugu (istasyon II) bolgesinde yapilmistir. Bu iki istasyonda, su sicakligi, kimyasal oksijen ihtiyaci (KOI), pH, nitrat (NO 3 -N), nitrit (NO 2 -N), amonyak (NH 3 -N) ve cozunmus reaktif fosfor (CRF) degerleri tayin edilmistir. Arastirma, yaz mevsiminde (Haziran, Temmuz, Agustos) ve her bir istasyondan 45 adet balik orneklenerek gerceklestirilmistir. Ayrica hematolojik parametrelerden eritrosit (RBC) ve RBC indeksleri (MCV: Ortalama Eritrosit Buyuklugu, MCH: Ortalama Eritrosit Hemoglobini, MCHC: Ortalama Eritrosit Hemoglobin Konsantrasyonu), lokosit (WBC), hemoglobin (Hb), hematokrit (Hct) degerleri ve lokosit hucre formulleri (lenfosit, monosit, notrofil, eozinofil) ile serum glikoz ve protein seviyeleri gozlenmistir. Istasyon II’deki fiziko-kimyasal parametre KOI, NH 3 -N, NO 2 -N, pH ve CRF seviyeleri, istasyon I’den daha yuksek bulunmustur. Calismada, Ceyhan Nehri’nin desarj bolgesinden yakalanan C.gariepinus ’ta WBC degerleri ve lokosit hucre formullerinde cevresel stresorlerden dolayi artislar, RBC, RBC indeksleri, Hb ve Hct degerlerinde ise azalma tespit edilmistir ( p <0,05). Diger yandan ayni bolgedeki serum glikoz seviyeleri yukselmis, protein degerleri ise dusmustur. Calisma, sucul ekosistemlerin kirliliklerinin biyolojik takiplerinde, hematolojik parametrelerin rasyonel kullanimlari acisindan onem arz etmektedir.