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کد مقاله : JEST-2209-5743 (R1) بازدید : 93 صفحه: 71 - 81

10.30495/jest.2023.69296.5743

نوع مقاله: پژوهشی

نقشه پراکنش عناصر پرتوزا و ارزیابی دز جذبی و آلودگی هسته ای در شبه جزیره میانکاله، شمال ایران

محورهای موضوعی : مواد هسته ای و رادیو اکتیو

رضا پورایمانی 1 (دانشیار فیزیک هسته‌ای دانشگاه اراک، دانشکده علوم پایه، گروه فیزیک، اراک، ایران. *( مسوول مکاتبات))
سید محسن مرتضوی شاهرودی 2 (دکتری فیزیک هسته‌ای دانشگاه اراک، دانشکده علوم پایه، گروه فیزیک، اراک، ایران)
روشنک قربانی 3 (کارشناس ارشد فیزیک هسته‌ای دانشگاه اراک، دانشکده علوم پایه، گروه فیزیک، اراک، ایران)

تاریخ دریافت : 1401/06/21 تاریخ پذیرش : 1401/09/02 تاریخ انتشار : 1401/11/01

کلید واژه: آشکارساز HPGe, فعالیت ویژه, صنعت پتروشیمی, شبه‌جزیره میانکاله, تابش محیطی,

چکیده مقاله :

زمینه و هدف: در این پژوهش به منظور ارزیابی میزان تابش محیطی و به دست آوردن میزان تاثیرات گسترش صنایع از جمله پتروشیمی بر ایجاد آلودگی هسته ای، فعالیت ویژه عناصر پرتوزا و میزان دز جذبی در شبه جزیره میانکاله در شمال ایران در جنوب شرقی دریای خزر اندازه گیری شد. روش بررسی: 43 نمونه شامل 13 نمونه آب و 30 نمونه رسوب از سواحل شمالی و جنوبی شبه جزیره میانکاله جمع آوری و فعالیت ویژه عناصر پرتوزا در نمونه ها با استفاده از آشکارساز فوق خالص ژرمانیومی اندازه گیری شد. نقشه توزیع فعالیت عناصر پرتوزا با استفاده از نرم افزار GIS ترسیم شد. نمونه برداری در تابستان 1400 انجام شد. یافته ها: میانگین فعالیت ویژه Ra226، Th232، K40 و Cs137 در نمونه های رسوبی به ترتیب 62/1±17/18، 36/1±21/16، 45/9±28/266 و 27/0±61/2 و میانگین فعالیت ویژه Ra226، Th232 و K40 در نمونه های آبی به ترتیب 12/0±78/0، 75/0±39/5 و 79/1±89/17 بکرل بر کیلوگرم به دست آمد. میانگین دز جذبی نیز 91/1±73/28 نانوگری برساعت محاسبه شد. بحث و نتیجه گیری: فعالیت هسته های پرتوزای طبیعی کمتر از مقدار میانگین جهانی بود. مقدار دز جذبی در این منطقه در حد مجاز است. میانگین غلظت عناصر پرتوزا در نمونه های آب ساحل جنوبی شبه جزیره میانکاله بیشتر از ساحل شمالی آن که در مجاورت دریای خزر است می باشد. اما غلظت Ra226، Th232 و K40 در رسوبات ساحل شمالی بیشتر از ساحل جنوبی است. غلظت Cs137 در ساحل جنوبی شبه جزیره میانکاله که در ناحیه خشک قرار دارد به علت نبود جریان آب از بقیه نقاط بیشتر است.

چکیده انگلیسی:

Background and objective: The study, to assess the level of environmental radiation and to obtain the impact of the development of industry, including petrochemicals, on the formation of nuclear pollution, the specific activity of radionuclides, and the amount of absorbed dose were measured in the Miankaleh peninsula in the north of Iran, south-east of the Caspian Sea. Material and Methodology: 43 samples were collected from the north and south coasts of the Miankala peninsula, including 13 bottles of water and 30 bags of sediments, and the specific activities of radionuclides in the samples were determined using a high-purity germanium detector. The distribution map of radioactive elements was made using GIS software. Findings: The average specific activity of 226Ra, 232Th, 40K and 137Cs in sediment samples were 18.17±1.62, 16.21±1.36, 266.28±9.45, and 2.61±0.27 Bqkg-1, respectively, and the average specific activity of 226Ra, 232Th and 40K in water samples was 0.78±0.12, 5.39±0.75 and 17.89±1.79 Bqkg-1, respectively. The average absorbed dose rate in air was calculated as 28.73±1.91 nGyh-1. Discussion and Conclusion: The specific activity of natural radionuclides was calculated to be lower than the global average. The amount of dose absorbed in this area is within the permissible limit. The average radioactive concentration in the water samples of the southern shores of the Miankala peninsula is higher than its northern shores, which are adjacent to the Caspian Sea. However, the concentration of 226Ra, 232Th, and 40K in the northern coastal sediments is higher than that of the southern coasts. The concentration of 137Cs is higher on the southern coast of the Miankala peninsula, which located in a dry area, due to the lack of water flow.

منابع و مأخذ:


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  4. Davidson, W., Spezanno, P., Hilton, J., 1993. Remobilization of caesium from freshwater sediments. J. Environ. Radioact. Vol. 19, pp. 109-124. https://doi.org/10.1016/0265-931X(93)90072-F.
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  3. Pourimani, R., Mortazavi Shahroodi, S.M., 2018. Radiological Assessment of the Artificial and Natural Radionuclide Concentrations of Wheat and Barley Samples in Karbala, Iraq. Iran. J. Med. Phys. Vol. 15(2), pp. 126-131. https://doi.org/10.22038/ijmp.2017.24190.1238.
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  8. Pourimani, R., Rahimi, S., 2016. Radiological Assessment of the Artificial and Natural Radionuclide Concentrations of Some Species of Wild Fungi and Nourished Mushrooms. Iran. J. Med. Phys. Vol. 13(4), pp. 269-275. https://dx.doi.org/10.22038/ijmp.2017.8293.
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    11.

 

 

 

 

_||_

  1. United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR), 2008, Sources, effects and risks of ionizing radiation, New York: Report to the General Assembly with annexes.
    2.
  2. Ali, Y.F., Cucinotta, F.A., Ning-Ang, L., Zhou, G., 2020. Cancer Risk of Low Dose Ionizing Radiation. Front. Phys. Vol. 8, pp. 234. https://doi.org/10.3389/fphy.2020.00234.
    3.


  1. Wrenn, M.E., Durbin, P.W., Howard, B., Lipsztein, J., Rundo, J., Still, E.T., Willis, D.I., 1985. Metabolism of ingested U and Ra. Health. Phys. Vol. 48, pp. 601-633.
    2.
  2. Sankaranarayanan, K., 1999. Ionizing radiation and genetic risks: X. The potential “disease phenotypes” of radiation-induced genetic damage in humans: perspectives from human molecular biology and radiation genetics. Mutation Research. Vol. 429, pp. 45-83. https://doi.org/10.1016/s0027-5107(99)00100-1.
    3.
  3. Pujol, L., Sanchez-Cabeza, J.A., 2000. Natural and artificial radioactivity in surface waters of the Ebro river basin (Northeast Spain). J. Environ. Radioact. Vol. 51(2), pp. 181-210. https://doi.org/10.1016/S0265-931X(00)00076-X.
    4.


  1. M J Frissel, and R Pennders, 1983. Models for the accumulation and migration of 90Sr, 137 Cs, 239,240Pu and 241Am in the upper layer of soils. In: Coughtrey PJ (ed) Ecological aspects of radionuclide release. Blackwell, Oxford, pp. 63-72.  ISBN 0632011858
    2.
  2. He, Q., Walling, D.E., 1997. The distribution of fallout 137Cs and 210Pb in undisturbed and cultivated soils. Appl. Radiat. Isot. Vol. 48, pp. 667-690. https://doi.org/10.1016/S0969-8043(96)00302-8.
    3.
  3. Ritchie, J.C., Mchenry, J.R., 1990. Application of radioactive fallout cesium-137 for measuring soil erosion and sediment accumulation rates and patterns. J. Environ. Qual. Vol. 19, pp. 215-233. https://doi.org/10.2134/jeq1990.00472425001900020006x.
    4.
  4. Davidson, W., Spezanno, P., Hilton, J., 1993. Remobilization of caesium from freshwater sediments. J. Environ. Radioact. Vol. 19, pp. 109-124. https://doi.org/10.1016/0265-931X(93)90072-F.
    5.
  5. Geographic information system version 10.3 (GIS10.3) (Computer software), 2014. Retrieved from: https://www.esri.com
    6.


  1. Sufi, T., Hassanzati, A., Mohammadgholipour, M., Sa, A., Mohammadnazemi, A., 2006. hydrological study on Gorgan Bay. Iran Fisheries Science Research Institute. (In Persian) https://civilica.com/doc/1091120
    2.
  2. International Atomic Energy Agency (IAEA), 2003, Collection and Preparation of bottom sediment sample for analysis of radionuclides and trace element (IAEA-TECDOC-1360, Vienna).
    3.
  3. Pourimani, R., Mortazavi Shahroodi, S.M., 2018. Radiological Assessment of the Artificial and Natural Radionuclide Concentrations of Wheat and Barley Samples in Karbala, Iraq. Iran. J. Med. Phys. Vol. 15(2), pp. 126-131. https://doi.org/10.22038/ijmp.2017.24190.1238.
    4.
  4. Paiva, J.D.S., Farias, E.E., Franca, E.J.D., 2015. Assessment of the equilibrium of Th-228 and Ra-228 by gamma-ray spectrometry in mangrove soils.
    5.
  5. Shahrokhi, A., Kovacs, T., 2021. Radiological survey on radon entry path in an underground mine and implementation of an optimized mitigation system. Environ. Sci. Eur. 33, 66. https://doi.org/10.1186/s12302-021-00507-w.
    6.
  6. Pourimani, R., Anoosheh, F., 2015. A Study on Transfer Factors of Environmental Radionuclides: Radionuclide Transfer from Soil to Different Varieties of Rice in Gorgan, Iran. J. Med. Phys. 12(3), 189-199. https://doi.org/10.22038/IJMP.2015.6220.
    7.
  7. Pourimani R., and Mohebian M., 2021. Study of Background Correction of Gamma-Ray Spectrometry Using Reference Materials. Iranian journal of Science and Technology Transaction A: Vol. 45, pp. 733-736. https://doi.org/10.1007/s40995-020-01044-6
    8.
  8. Pourimani, R., Rahimi, S., 2016. Radiological Assessment of the Artificial and Natural Radionuclide Concentrations of Some Species of Wild Fungi and Nourished Mushrooms. Iran. J. Med. Phys. Vol. 13(4), pp. 269-275. https://dx.doi.org/10.22038/ijmp.2017.8293.
    9.
  9. European Commission (EC), 1999. Radiological protection principles concerning the natural radioactivity of building material, In EC radiation protection, 112, Directorate General Environment, Nuclear Safety and Civil Protection.
    10.
  10. Pourimani R, Davoodmaghami T, Mohebian M.,2020. Determination of radiological map of radionuclides distribution in soils ‎around of Shazand oil power plant. IJRSM 2020; 8 (4) :63-72.
    11.

 

 

 

 

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