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Radioactivity levels in the marine environment along the Exclusive Economic Zone (EEZ) of Qatar
2015
Al-Qaradawi, Ilham | Abdel-Moati, Mohamed | Al-Yafei, Mohsin Al-Ansi | Al-Ansari, Ebrahim | Al-Maslamani, Ibrahim | Holm, E. (Elis) | Al-Shaikh, Ismail | Mauring, Alexander | Pinto, Primal V. | Abdulmalik, Dana | Amir, Amina | Miller, Mark | Yigiterhan, Oguz | Persson, Bertil
A study on 137Cs, 40K, 226Ra, 228Ra, and 238U was carried out along the EEZ of Qatar. Results serve as the first ever baseline data. The level of 137Cs (mean value 1.6±0.4Bqm−3) in water filters was found to be in the same order of magnitude as reported by others in worldwide marine radioactivity studies. Results are also in agreement with values reported from other Gulf regions. The computed values of sediment–water distribution coefficients Kd, are lower than the values given by IAEA. Measurements were carried out for bottom sediments, biota samples like fish, oyster, sponge, seashell, mangrove, crab, shrimp, starfish, dugong and algae. The ‘concentration factors’ reported for biota samples are below the levels published by IAEA and cause no significant impact on human health for seafood consumers in Qatar.
Показать больше [+] Меньше [-]Opening Fukushima floodgates: Modelling 137Cs impact in marine biota
2021
Periáñez, Raúl | Qiao, Fangli | Zhao, Chang | de With, Govert | Jung, Kyung-Tae | Sangmanee, Chalermrat | Wang, Guansuo | Xia, Changshui | Zhang, Min
A numerical model was applied to simulate the transport of ¹³⁷Cs released with the waters which were used to cool Fukushima reactors. These stored waters will be released to the Pacific Ocean according to Japanese government plans. The radionuclide transport model is Lagrangian and includes radionuclide interactions with sediments and an integrated dynamic foodweb model for biota uptake. Calculations made from a conservative approach indicate that expected concentrations in sediments and marine fish would be orders of magnitude below those detected after Fukushima accident and also lower than those resulting from global fallout background.
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