Assessment of Environmental Radioactivity in Sediments, Water and Reed Samples at the Inlet of Wastewater Treatment Plant to Arak Meyghan Wetland

Subject Areas : Radio active

Reza Pourimani ¹ , Ramin Fardad ² , Mahmoud Mirzaei ³

1 - Associate Professor, Department of Physics, Faculty of Science, Arak University, Arak, Iran *(Corresponding Author).
2 - M.Sc., Nuclear Physics, Department of Physics, Faculty of Science, Arak University, Arak, Iran.
3 - Associate Professor, Department of Physics, Faculty of Science, Arak University, Arak, Iran.

Received: 2018-12-15 Accepted : 2019-06-11 Published : 2021-08-23

Keywords: HPGe detector, Environmental radioactivity, Radium equivalent, Meyghan wetland,

Abstract :

Background and Objective: Radionuclides are naturally occurring in water, soil, plants and air, and today, industrial and urban pollutants are also effective in increasing its level. As part of this research, the impact of Arak wastewater treatment plant production on environmental radiation in the Meyghan wetland entrance area was examined.Material and Methodology: In this study, 10 sediment samples, 10 water samples and 10 reed samples from the water input zone from the Arak wastewater treatment plant to Meyghan wetlands were collected. The specific activities of radionuclides were determined using gamma ray spectrometry method employing high purity germanium detector (HPGe) and maps of the distribution of radionuclides in this area were prepared for sediment and water samples.Findings: The average values ​​of specific activity of 226Ra, 232Th, 40K and 137Cs in sediment samples were 22.86, 27.26, 409.04 and 6.34, and in water samples 2.67, 3.04, 23.7 and 0.37 as well as in reed samples 8.8, 9.59, 45.66 and 2.26 in Bqkg-1, respectively. The amount of radium equivalent activity in sediment samples ranges from 84.14 to 104.55, with an average of 93.34 in Bqkg-1.Discussion and Conclusion: The average Raeq value in the sediment samples obtained as 93.34Bqkg-1, which is less than the global average (139.7Bqkg-1). It seems that the pollutants are removed from the water taken in calm ponds and the treatment section by active sludge, and the water entering the wetlands contains a small amount of radioactive contaminants.

References:

1. El-Taher A, Uosif M.A., Orabi A.A., 2007. Natural radioactivity levels and radiation hazard indices in granite from Aswan to Wadi El-Allaqi southeastern desert, Egyptian Radiation Protection Dosimetry, 124(2), 148-154


2. El-Arabi, A.M., 2007. ²²⁶Ra, ²³²Th and ⁴⁰K concentration in igneous rocks from eastern desert Egypt and its radiological implication. Radiation Measurement, 42, 94-100.


3. Singh P, Rana N, Azam A, Naqvi A, Srivastava D., 1996. Levels of uranium in waters from some Indian cities determined by fission track analysis. Radiation Measurements, 26(5), 683-687


4. Firestone B R, Shirley S V, Bagalin M C, Frank Chu SY, Zipkin J. The Edition of Table of isotopes, CD-ROM, John Wiley & Sons Inc


5. Wedepohl , 1995. The composition of the continental crust. Geochimica et Cosmochimica Acta, 59,1217-1239


6. UNSCEAR, 2008. United Nations Scientific Committee on the Effects of Atomic Radiation. Exposure from natural sources of radiation, United Nations publication sales No. 10.IX.3


7. International Atomic Energy Agency. Collection and      Preparation of bottom sediment sample for analysis of radionuclides an trace element. IAEA- TECDOC-1360, IAEA; VIENNA; 2003.


8. Gilmore GR, Practical Gamma-ray Spectrometry, 2nd Edition, Nuclear Training Services Ltd Warrington, UK, 2008; ISBN: 978-0-470-86196-7


9. Aziz A, 1981. International Atomic Energy Agency, Vienna, Methods of Low-Level Counting and Spectrometry Symposium. Berlin. Vol. 221.


10. Pourimani R., Asadpour F., 2016. Determination of Specific Activities of Radionuclides in Soil and Their Transfer Factor from Soil to Bean and Calculation of Cancer Risk for Bean Consumption in Iran. Arak Medical University Journal (AMUJ), 19(107), 9-18.(In Persian)


11. Florou H., Kriditis P., 1992. Gamma radiation measurements and dose rate in the coastal areas of a volcanic island, Aegan Sea, Greece, Radiation Protection Dosimetry. 45 (1), 277–279.


12. Ibrahiem, N.M., Shawky, S.M., Amer, H.A., 1995. "Radioactivity levels in Lake Nasser sediments", Appl. Radiat. Isot. 46 (5), 297–299.


13. Lambrechts A., Foulquier L., Garnier-Laplace J., 1992. "Natural radioactivity in the aquatic components of the main French rivers", Radiat. Prot. Dosim. 45 (1), 253–256.


14. Tsabaris C., Eleftheriou G., Kapsimalis V., Anagnostou C., Vlastou R., Durmishi C., Kedhi M., Kalfas C.A., 2007. " Radioactivity levels of recent sediments in the Butrint Lagoon and the adjacent coast of Albania", Appl. Radiat. Isot. 65 (4), 445–453.


15. Ligero R.A., Ramos-Lerate I., Barrera M., Casas-Ruiz M., 2001. Relationships between sea-bed radionuclide activities and some sedimentological variables. J. Environ. Radioact. 57, 7–


16. Benamar M.A., Zerrouki A., Idiri Z., Tobbeche S., 1997. Natural and artificial levels in sediments in Algiers Bay. Appl. Radiat. Isot. 48 (8),1161–


17. Doretti L., Ferrar D., Barison G., Gerbasi R., Battiston G., 1992. Natural radionuclides in the muds and waters used in thermal therapy in Abano Terme, Italy. Radiat. Prot. Dosim. 45 (1), 175–