Activity concentrations of 226Ra, 232Th, 137Cs and 40K in Cystoseira barbata samples harvested from the Eastern Black Sea coast of Türkiye

Yıl 2024, Cilt: 14 Sayı: 4, 1049 - 1057, 15.12.2024

Nilay Akçay

https://doi.org/10.17714/gumusfenbil.1471768

Öz

Macroalgae are important bioorganisms used in fish feed and food industry. In addition, macroalgae are used in studies to determine radioactive pollution levels in the seas. In this study, it was aimed to determine the activity concentrations of 226Ra, 232Th, 137Cs and 40K in Cystoseira barbata which is a brown macroalgae samples obtained from the Eastern Black Sea coast of Turkey. Gamma spectrometry analyzes of the samples were carried out with high purity germanium (HPGe) detector system in the Nuclear Physics laboratory of Recep Tayyip Erdoğan University. The average 226Ra, 232Th, 137Cs and 40K activity concentrations in the samples were found to be 11.2, 7.61, 2.74 and 690.7 Bq.kg-1, respectively. The average annual effective dose values resulting from these radionuclides were obtained as 3.14, 1.75, 0.04 and 4.28 µSv.y-1, respectively. Total annual effective dose values calculated with the contribution of all radionuclides were found to be in the range of 1.37-18.83 µSv.y-1. The calculated annual effective dose values are lower than 0.29 mSv.y-1, which is stated by UNSCEAR as the average annual effective dose received through ingestion of natural radionuclides, and the samples examined do not pose any radiological risk.

Anahtar Kelimeler

Bioindicator, Black sea, Cystoseira barbata, Macroalg, Radioactivity

Etik Beyan

The authors of this article declare that the materials and methods used in this study do not require ethical committee approval and/or legal-specific permission.

Destekleyen Kurum

In this study, the data obtained from the Doctorate Thesis of first author titled “Determination of radioactivity levels for sea water, sediment and some macroalgae in Black Sea coast” accepted by Karadeniz Technical University, the Graduate School of Natural and Applied Sciences, in 2013 were used. Additionaly, a part of this study was supported by the RTEU Scientific Research Projects Coordination Unit within the scope of project number 2011.102.01.1.

Teşekkür

We would like to thank the editor and referees for their contributions to the review and evaluation phase of the article.

Türkiye’nin Doğu Karadeniz kıyılarından toplanan Cystoseira barbata numunelerindeki 226Ra, 232Th, 137Cs ve 40K aktivite konsantrasyonları

Öz

Makroalgler, balık yemi ve gıda sanayinde kullanılan önemli biyoorganizmalardır. Ayrıca makroalglerden denizlerdeki radyoaktif kirlilik düzeylerinin belirlenmesi çalışmalarında yararlanılır. Bu çalışmada Türkiye’nin Doğu Karadeniz kıyılarından toplanan kahverengi bir macroalg olan Cystoseira barbata numunelerinde 226Ra, 232Th, 137Cs ve 40K aktivite konsantrasyonlarının belirlenmesi amaçlandı. Örneklerin gama spektrometre analizleri Recep Tayyip Erdoğan Üniversitesi Nükleer Fizik laboratuvarında bulunan yüksek saflıktaki germanyum (HPGe) dedektör sistemiyle gerçekleştirildi. Numunelerdeki ortalama 226Ra, 232Th, 137Cs ve 40K aktivite konsantrasyonları sırasıyla 11.2, 7.61, 2.74 ve 690.7 Bq.kg-1 olarak bulundu. Bu radyonüklitlerden kaynaklanan ortalama yıllık etkin doz değerleri sırasıyla 3.14, 1.75, 0.04 ve 4.28 µSv.y-1 olarak elde edildi. Tüm radyonüklitlerin katkısı ile hesaplanan toplam yıllık etkin doz değerleri 1.37-18.8 µSv.y-1 aralığında bulundu. Hesaplanan yıllık etkin doz değerleri UNSCEAR tarafından doğal radyonüklitlerin sindirimi yoluyla alınan ortalama yıllık etkin doz değeri olarak belirtilen 0.29 mSv.y-1’den düşüktür ve incelenen numuneler radyolojik açıdan herhangi bir risk teşkil etmemektedir.

Anahtar Kelimeler

Biyoindikatör, Karadeniz, Cystoseira barbata, Makroalg, Radyoaktivite

Destekleyen Kurum

In this study, the data obtained from the Doctorate Thesis of first author titled “Determination of radioactivity levels for sea water, sediment and some macroalgae in Black Sea coast” accepted by Karadeniz Technical University, the Graduate School of Natural and Applied Sciences, in 2013 were used. Additionaly, a part of this study was supported by the RTEU Scientific Research Projects Coordination Unit within the scope of project number 2011.102.01.1.

Teşekkür

We would like to thank the editor and referees for their contributions to the review and evaluation phase of the article.

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