Kızılırmak Nehri’nden Alınan Su ve Sediment Örneklerinde Kalıcı Organik Kirleticilerin Tespiti

Öz

Yasaklanmalarının üzerinden onlarca yıl geçmesine rağmen kalıcılıkları nedeniyle hala doğada bulunabilen Kalıcı organik kirleticiler (KOK)’den organik klorlu pestisit (OCP), polibromlu difenileter (PBDE) ve poliklorlu bifenil (PCB)’ler sedimentte birikerek çevre ve iklim koşullarına bağlı olarak suya geri salınmaktadırlar. Kızılırmak Nehri ise İç Anadolu Bölgesi’nden doğarak Karadeniz’e dökülen on ilin sınırları içinden geçen Türkiye’nin en uzun nehridir. Kızılırmak Nehri’nin Kırıkkale sınırları içindeki bölümü üzerinde organize sanayi bölgesi, petrokimya ve silah tesisleri bulunmakta, şehrin kanalizasyon deşarjı da nehre yapılmaktadır. Bu nedenle suda bulunan ve sedimentte birikmiş olan KOK’ların miktarı nehrin suyunun kullanıldığı bölgeler için önem taşımaktadır. Bu çalışmada Haziran 2018 ile Mayıs 2019 tarihleri arasındaki 1 yıl boyunca toplanan 60 sediment ve 60 su örneğinde 9 OCP (α, β, γ-hekzaklorosiklohekzan, hekzaklorobenzen, heptaklor, 4,4’-diklorodifenil dikloroetan- 4,4’-DDE, 4,4’-diklorodifenil dikloroetilen- 4,4’-DDD, 2,4’-diklorodifenil trikloroetan- 2,4’-DDT, 4,4’-diklorodifenil trikloroetan- 4,4’-DDT), 7 PCB (28, 52, 101, 118, 138, 153, 180) ve 6 PBDE (17, 47, 66, 100, 153, 183) olmak üzere toplam 22 KOK’un miktarına bakılarak varsa mevsimsel değişikliklerin ortaya konulması amaçlanmıştır. Yapılan analizler sonucunda en sık tespit edilen KOK’un 4,4’-DDE, kalıntı konsantrasyonunun en yüksek olduğu ayın ise Ağustos olduğu belirlenmiştir.

Anahtar Kelimeler

• Kalıcı organik kirletici,PBDE,PCB,Organik klorlu pestisitler,Kızılırmak Nehri

Determination of Persistent Organic Pollutants in Water and Sediment Samples from Kızılırmak River

Öz

The organic chlorinated pesticide (OCP), polybrominated diphenylether (PBDE) and polychlorinated biphenyls (PCBs), which can be found in nature due to their persistence even decades after their prohibition, are deposited in sediment and released back to water depending on environmental and climatic conditions. Kızılırmak, the longest river of Turkey, passes through ten provinces and flows from the Central Anatolia to the Black Sea. There is an organized industrial zone, petrochemical and weapon facilities on  Kızılırmak River within Kırıkkale border and the city’s sewage is discharged into the river. Therefore, the amount of persistent organic pollutants (POPs) present in water and deposited in sediment is important for the areas where river water is used. In this study, it was aimed to determine the seasonal changes, if any, by evaluating the total amount of 22 POPs; 9 OCPs (α, β, γ-hexachlorocyclohexane, hexachlorobenzene, heptachlor, 4,4'-dichlorodiphenyldichloroethane-4,4'-DDE, 4,4'-dichlorodiphenyldichloroethylene-4,4'-DDD, 2,4'- dichlorodiphenyl trichloroethane-2,4'-DDT, 4,4'-dichlorodiphenyl trichloroethane-4,4'-DDT), 7 PCBs (28, 52, 101, 118, 138, 153, 180) and 6 PBDEs (17, 47, 66, 100, 153, 183) in 60 sediment and 60 water samples collected for 1 year between June 2018 and May 2019. The most frequently detected POP was 4,4'-DDE and the highest residue concentration was in August.

Anahtar Kelimeler

• Persistent organic pollutants,PBDE,PCB,Organochlorine pesticides,Kizilirmak River

Kaynakça

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