NİLÜFER ÇAYINDAKİ POLİKLORLU BİFENİLLERİN (PCB’LERİN) YÜZEYSEL SU VE SEDİMENTTEKİ KONSANTRASYONLARI (2020-2021)

Öz

Bu araştırmada, yüzey suyu ve sediment örnekleri, PCB konsantrasyonlarının analiz edilmesi amacıyla Bursa’daki 7 farklı noktalardan bir yıl boyunca eş zamanlı olarak toplanmıştır. Yüzey suyu örnekleri amber renkli cam şişelerle, sediment örnekleri ise Ekman kepçesi kullanılarak alınmış ve örnekler koyu renkli cam şişelere aktarılmıştır. Ekim 2020 – Eylül 2021 dönemini kapsayan örnekleme çalışması aylık periyotlarla yürütülmüştür. Bu süreçte, yüzey suyunun çözünmüş ve partikül fazlarında ve ayrıca sedimentte toplam 41 PCB (∑41PCB) bileşiği tespit edilmiştir. Ölçülen ∑41PCB konsantrasyonlarının ortalama değerleri sırasıyla 53,8±54,7 ng/L, 92,8±59,3 ng/L ve 71,4±38,7 ng/g kuru madde (KM) olarak hesaplanmıştır. Partikül fazdaki en yüksek PCB seviyeleri endüstriyel/tarımsal alanlardan alınan örneklerde (168,7±21,2 ng/L) kaydedilmiştir. Çözünmüş faz ile sediment örneklerindeki en yüksek konsantrasyonlar ise kentsel/tarımsal alanlarda sırasıyla 163,8±27,0 ng/L ve 145,7±15,3 ng/g KM olarak belirlenmiştir. Sediment örneklerinde hesaplanan toplam toksisite eşdeğerlilik (TEQ) değerleri, özellikle kentsel ve tarımsal etkilerin bir arada görüldüğü bölgelerde belirgin şekilde artış göstermiş ve indikatör PCB’lerin baskın olduğunu ortaya koymuştur. Buna karşılık, sediment kalitesi kılavuz katsayısı (SKKK) değerlerinin tüm örnekleme noktalarında 1’in oldukça altında kalması, sedimentlerin genel olarak düşük ekotoksikolojik risk düzeyinde olduğunu göstermektedir. Elde edilen sonuçlar, PCB kirliliğinin Bursa’daki çevresel koşullar ve antropojenik faaliyetlerle yakından ilişkili olduğunu ve özellikle kentsel-endüstriyel bölgelerde toksikolojik açıdan izleme gerekliliğini ortaya koymaktadır.

Anahtar Kelimeler

• Bursa
• Mekânsal dağılım
• PCB
• Sediment
• Yüzeysel su

Destekleyen Kurum

Bursa Uludağ Üniversitesi

Proje Numarası

OUAP (MH)-2020/8

Etik Beyan

Etik Onaya gerek yoktur.

Teşekkür

Çalışmanın maddi desteğini sağlayan Bursa Uludağ Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon Birimi (BAP) (Proje no: OUAP (MH)-2020/8)’ne teşekkür ederiz. Ayrıca PCB verilerinin GC okumalarındaki katkısından dolayı Prof. Dr. Banu Çetin ve ekibine teşekkür ederiz.

Concentration of Polychlorinated Biphenyls (PCBs) in Surface Water and Sediment of the Nilufer Stream (2020-2021)

Öz

In this study, surface water and sediment samples were collected simultaneously from 7 different points in Bursa for one year to analyze PCB concentrations. Surface water samples were collected in amber colored bottles, while sediment samples were collected using an Ekman grab, and the samples were transferred to dark glass bottles. The sampling campaign, covering the period of October 2020 – September 2021, was carried out in monthly periods. During this period, a total of 41 PCB ∑41PCB compounds were detected in the dissolved and particulate phases of surface water, as well as in the sediment. The mean values of the measured PCB concentrations were calculated as 53.8±54.7 ng/L, 92.8±59.3 ng/L, and 71.4±38.7 ng/g dry matter (DM), respectively. The highest PCB levels in the particulate phase were recorded in samples taken from industrial/agricultural areas (168.7±21.2 ng/L). The highest concentrations in the dissolved phase and sediment samples were determined as 163.8±27.0 ng/L and 145.7±15.3 ng/g DM in urban/agricultural areas, respectively. Total toxicity equivalence (TEQ) values calculated in sediment samples increased significantly, particularly in areas where urban and agricultural impacts coexist, demonstrating the dominance of indicator PCBs. Conversely, the sediment quality guideline coefficient (SQGC) values remained well below 1 at all sampling points, indicating that the sediments generally pose a low ecotoxicological risk. The results demonstrate that PCB pollution is closely related to environmental conditions and anthropogenic activities in Bursa and that toxicological monitoring is necessary, especially in urban-industrial areas.

Anahtar Kelimeler

• Bursa
• Spatial distribution
• PCB
• Sediment
• Surface water

Destekleyen Kurum

Bursa Uludag University

Proje Numarası

OUAP (MH)-2020/8

Teşekkür

We would like to thank Bursa Uludağ University Scientific Research Projects Coordination Unit (BAP) (Project no: OUAP (MH)-2020/8) for providing financial support for this study. We also thank Prof. Dr. Banu Çetin and her team for their contribution to the GC readings of the PCB data.

Kaynakça

1. Alonso-Hernandez, C.M., Mesa-Albernas, M. ve Tolosa, I. (2014) Organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in sediments from the Gulf of Batabanó, Cuba, Chemosphere, 94, 36–41. doi.org/10.1016/j.chemosphere.2013.09.007
2. Aly Salem, D.M.S., Khaled, A. ve El Nemr, A. (2013) Assessment of pesticides and polychlorinated biphenyls (PCBs) in sediments of the Egyptian Mediterranean Coast, Egyptian Journal of Aquatic Research, 39, 141–152. doi.org/10.1016/j.ejar.2013.11.001
3. An, Q., Wu, Y., Wang, J. ve Li, Z. (2009) Heavy metals and polychlorinated biphenyls in sediments of the Yangtze river estuary, China, Environmental Earth Sciences,. 59, 363–370. https://doi.org/10.1007/s12665-009-0034-4
4. Arfaeinia, H., Asadgol, Z., Ahmadi, E., Seifi, M., Moradi, M. ve Dobaradaran, S. (2017) Characteristics, distribution and sources of polychlorinated biphenyls (PCBs) in coastal sediments from the heavily industrialized area of Asalouyeh, Iran, Water Science & Technology, 76, 3340–3350. doi.org/10.2166/wst.2017.500
5. Cetin, B., Yatkin, S., Bayram, A. ve Odabasi, M. (2007) Ambient concentrations and source apportionment of PCBs and trace elements around an industrial area in Izmir, Turkey, Chemosphere, 69, 1267–1277. doi.org/10.1016/j.chemosphere.2007.05.064
6. Devi, N. L., Yadav, I. C., Shihua, Q., Chakraborty, P. ve Dan, Y. (2014) Distribution and risk assessment of polychlorinated biphenyls (PCBs) in the remote air and soil of Manipur, India. Environmental Earth Sciences, 72(10), 3955–3967. doi.org/10.1007/s12665-014-3284-8
7. Dhananjayan, V., Ravichandran, B., Jawahar, S., Mala, A., Shridhar, K., Panjakumar, K., Gopalakrishnan, A. ve Thamaraikannan, M. (2025) Risk assessment and contaminant characterization of PCBs, PAHs, and heavy metals in Pichavaram mangrove sediments, Tamil Nadu, India, Marine Pollution Bulletin, 217. 118094. doi.org/10.1016/j.marpolbul.2025.118094
8. Dong, J., Zhao, X., Dai, R., Guo, R., Liu, C., Cui, X., Liu, Y., Wang, H. ve Zheng, B. (2024) Spatial patterns, source apportionment, and risk assessment of polychlorinated biphenyls (PCBs) in the surface sediments of eastern China lakes along a latitudinal gradient: Insights guided by full-congener analysis, Journal of Hazardous Materials, 480. 136187. doi.org/10.1016/j.jhazmat.2024.136187

9. Duan, X., Li, Y., Li, X., Zhang, D. ve Li, M. (2013) Polychlorinated biphenyls in sediments of the Yellow Sea: Distribution, source identification and flux estimation, Marine Pollution Bulletin, 76, 283–290. doi.org/10.1016/j.marpolbul.2013.08.024
10. Gedik, K., Demircioĝlu, F. ve Imamoĝlu, İ. (2010) Spatial distribution and source apportionment of PCBs in sediments around izmit industrial complexes, Turkey. Chemosphere 81, 992–999. doi.org/10.1016/j.chemosphere.2010.09.005
11. Gurkan Ayyildiz, E. ve Esen, F. (2020) Atmospheric Polycyclic Aromatic Hydrocarbons (PAHs) at Two Sites, in Bursa, Turkey: Determination of Concentrations, Gas–Particle Partitioning, Sources, and Health Risk, Archives of Environmental Contamination and Toxicology, 78, 350–366. doi.org/10.1007/s00244-019-00698-7
12. Hoang, A.Q., Takahashi, S., Da Le, N., Duong, T.T., Huong Pham, T.M., Mai Pham, T.N., Huong Nguyen, T.A., Tran, T.M., Tu, M.B. ve Quynh Le, T.P. (2021) Comprehensive determination of polychlorinated biphenyls and brominated flame retardants in surface sediment samples from Hanoi urban area, Vietnam: Contamination status, accumulation profiles, and potential ecological risks, Environmental Research, 197, 111158. doi.org/10.1016/j.envres.2021.111158
13. Huang, Y., Li, J., Xu, Y., Xu, W., Cheng, Z., Liu, J., Wang, Y., Tian, C., Luo, C. ve Zhang, G. (2014) Polychlorinated biphenyls (PCBs) and hexachlorobenzene (HCB) in the equatorial Indian Ocean: Temporal trend, continental outflow and air-water exchange, Marine Pollution Bulletin, 80(1–2), 194–199. doi.org/10.1016/j.marpolbul.2014.01.007
14. Iwegbue, C. M. A., Oshenyen, V. E., Tesi, G. O., Olisah, C., Nwajei, G. E. ve Martincigh, B. S. (2022) Occurrence and spatial characteristics of polychlorinated biphenyls (PCBs) in sediments from rivers in the western Niger delta of Nigeria impacted by urban and industrial activities. Chemosphere, 291(P3), 132671. doi.org/10.1016/j.chemosphere.2021.132671
15. Konat, J. ve Kowalewska, G. (2001) Polychlorinated biphenyls (PCBs) in sediments of the southern Baltic Sea - Trends and fate, Science of the Total Environment, 280, 1–15. doi.org/10.1016/S0048-9697(01)00785-9
16. Niu, L., Mao, S., Zhou, J., Zhao, L., Zhu, Y., Xu, C., Sun, X., Sun, J. ve Liu, W. (2022) Polychlorinated biphenyls (PCBs) in soils from typical paddy fields of China: Occurrence, influencing factors and human health risks. Environmental Pollution, 307(May): doi.org/10.1016/j.envpol.2022.119567
17. Wolska, L., Mechlińska, A., Rogowska, J. ve Namieśnik, J. (2014). Polychlorinated biphenyls (PCBs) in bottom sediments: Identification of sources, Chemosphere,111, 151-156. doi.org/0.1016/j.chemosphere.2014.03.025
18. Özyürek, N.A., Gedik, K., Şiltu, E. ve Imamoǧlu, I. (2013) Levels and sources of polychlorinated biphenyls in Ankara creek sediments, Turkey, Journal of Environmental Science and Health, Part A. Toxic/Hazardous Substances and Environmental Engineering, 48, 800–808. doi.org/10.1080/10934529.2013.744652
19. Salem, D. M. S. A., Khaled, A. ve Nemr, A. E. (2013) Assessment of pesticides and polychlorinated biphenyls (PCBs) in sediments of the Egyptian Mediterranean Coast, The Egyptian Journal of Aquatic Research, 39(3), 141–152. doi.org/10.1016/j.ejar.2013.11.001
20. San, J-Y., Khuman, S.N., Park, M-K., Lee, H-Y., Kim, C-S., Lee, I-S. ve Choi, S-D. (2024) Distributions of PCDD/Fs, PCBs, and PCNs in coastal sediments collected from major industrial bays in South Korea, Marine Pollution Bulletin, 200. 116160. doi.org/10.1016/j.marpolbul.2024.116160
21. Sari, M.F., Esen, F., Cordova Del Aguila, D.A. ve Kurt Karakus, P.B. (2020) Passive sampler derived polychlorinated biphenyls (PCBs) in indoor and outdoor air in Bursa, Turkey: Levels and an assessment of human exposure via inhalation, Atmospheric Pollution Research, 11, 71–80. doi.org/10.1016/j.apr.2020.03.001
22. Sari, M.F. ve Esen, F. (2022) Atmospheric concentration, spatial variations, and source identification of persistent organic pollutants in urban and semi-urban areas using passive air samplers in Bursa, Turkey, Environmental Science and Pollution Research, 29, 32082-32092. doi.org/10.1007/s11356-021-17987-1
23. Sari, M.F., Esen, F. ve Cetin, B. (2023) Concentration levels, spatial variations and exchanges of polychlorinated biphenyls (PCBs) in ambient air, surface water and sediment in Bursa, Türkiye, Science of the Total Environment, 81(8). 992-999. doi.org/1016/j.scitotenv.2023.163224
24. Smith, K.E.C. ve McLachlan, M.S. (2006) Concentrations and partitioning of polychlorinated bi- phenyls in th esurface waters of the southern Baltic Sea-seasonal effects, Environmental Toxicology and Chemistry, 25, 2569–2575. doi.org/10.1897/05-660R.1.
25. Sobek, A., Wiberg, K., Sundqvist, K.L., Haglund, P., Jonsson, P. ve Cornelissen, G. (2014). Coastal sediments in the Gulf of Bothnia as a source of dissolved PCDD/Fs and PCBs to water and fish, Science of the Total Environment, 487, 463-470. doi.org/10.1016/j.scitotenv.2014.04.041
26. Vane, C.H., Harrison, I. ve Kim, A.W. (2007) Polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in sediments from the Mersey Estuary, U.K., Science of the Total Environment, 374, 112–126. doi.org/10.1016/j.scitotenv.2006.12.036
27. Vecchiato, M., Zambon, S., Argiriadis, E., Barbante, C., Gambaro, A., Piazza, R. (2015) Polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in Antarctic ice-free areas: Influence of local sources on lakes and soils. Microchemical Journal, 120, 26–33. doi.org/10.1016/j.microc.2014.12.008
28. Wang, Y., Wang, P., Fu, J. ve Jiang, G. (2012) The air-water exchange of polychlorinated biphenyls and polybrominated diphenyl ethers at an urban lake, a receipt water body for the effluent from a municipal sewage treatment plant, Chemosphere, 86, 217–222. doi.org/10.1016/j.chemosphere.2011.07.065
29. Wolska, L., Mechlińska, A., Rogowska, J. ve Namieśnik, J. (2014) Polychlorinated biphenyls (PCBs) in bottom sediments: Identification of sources, Chemosphere, 111. 151-156. doi.org/10.1016/j.chemosphere.2014.03.025
30. Yang, H., Zhuo, S., Xue, B., Zhang, C. ve Liu, W. (2012) Distribution, historical trends and inventories of polychlorinated biphenyls in sediments from Yangtze River Estuary and adjacent East China Sea, Environmental Pollution, 169, 20–26. doi.org/10.1016/j.envpol.2012.05.003
31. Yang, J-M., Salmon, A.G. ve Marty, M.A. (2010) Development of TEFs for PCB congeners by using an alternative biomarker-Thyroid hormone levels, Regulatory Toxicology and Pharmacology, 56(2):225-236. doi.org/10.1016/j.yrtph.2009.12.008
32. Zhang, L., Shi, S., Dong, L., Zhang, T., Zhou, L. ve Huang, Y. (2011) Concentrations and possible sources of polychlorinated biphenyls in the surface water of the Yangtze River Delta, China, Chemosphere, 85(3), 399–405. doi.org/10.1016/j.chemosphere.2011.07.064