Abstract

The natural radionuclides ²²⁶Ra, ²³²Th and ⁴⁰K and some heavy metals (Fe, Cd, Zn, Cu, Mn, Ni and Pb) were measured in samples of rice and flour consumed in Saudi Arabia. Gamma ray spectrometry was utilized to determine the activity concentration of the three nuclides. Heavy metals were analyzed by an inductively coupled plasma optical emission spectrophotometer (ICP-OES).The findings indicated that the average concentration of 226Ra, 228Th and 40K in the rice samples were 1.08, 1.19 and 83.08 Bq/kg, respectively. While, in the flour samples, the average concentrations were1.65, 1.61 and 171.31 Bq/kg, respectively. The ingestion doses were calculated to be 0.224 &muSv/Y for the rice and 0.471 &muSv/Y for the flour samples which are below the recommended 1mSvlimit. The concentration of heavy elements (Fe. Cd, Mn, Ni and Pb) in the rice and flour samples were below the detection limits. Whereas, the mean contents of Cu were 3.75 and 3.6mg/kg of the rice and the flour samples, respectively. The mean values of Zn in the rice and the flour samples were 19.42 mg/kg and 17.3 mg/kg, respectively. The daily intake of Cu and Zn through the rice and the flour samples were lower than the tolerable daily intakes by FAO/WHO; this indicates that there is no risk of intaking these foodstuffs by people.

Keywords:

Annual effective, Effective dose, foodstuff, heavy elements, hazard index, natural radionuclides,

References

1. Abbady, A.G.E., 2010. Evaluation of heat generation by radioactive decay of sedimentary rocks in Eastern Desert and Nile Valley, Egypt. Appl. Radiat. Isotopes, 68(10): 2020-24.
   Direct Link
2. Abojassim, A.A., H.H. Al-Gazaly and S.H. Kadhim, 2014. Estimated the radiation hazard indices and ingestion effective dose in wheat flour samples of Iraq markets. Int. J. Food Contamination, 1: 6.
   Direct Link
3. Al-Ghamdi, A.H., 2014. Activity concentrations and mean annual effective dose of spices food consumed by inhabitants of Saudi Arabia. J. Am. Sci., 10(11): 164-168.
   Direct Link
4. Awudu, A.R., A. Faanu, E.O. Darko, G. Emi-Reynolds, O.K. Adukpo, D.O. Kpeglo, F. Otoo, H. Lawluvi, R. Kpodzro, I.D. Ali, M.K. Obeng and B. Agyeman, 2012. Preliminary studies on 226Ra, 228Ra, 228Th and 40K concentrations in foodstuffs consumed by inhabitants of Accra metropolitan area, Ghana. J. Radioanal. Nucl. Ch., 291(3): 635-641.
   Direct Link
5. Desideri, D., M.A. Meli, C. Roselli, N. Forini, A. Rongoni and L. Feduzi, 2014. Natural radionuclides in Italian diet and their annual intake. J. Radioanal. Nucl. Ch., 299(3): 1461-1467.
   Direct Link
6. Duruibe, J.O., M.O.C. Ogwuegbu and J.N. Egwurugwu, 2007. Heavy metal pollution and human biotoxic effects. Int. J. Phys. Sci., 2(5): 112-118.
   Direct Link
7. El-Taher, A. and J.H. Al-Zahrani, 2014. Radioactivity measurements and radiation dose assessments in soil of Al-Qassim region, Saudi Arabia. Indian J. Pure Ap. Phy., 52(3): 147-154.
   Direct Link
8. Hosseini, T., A.A. Fathivand, H. Barati and M. Karimi, 2006. Assessment of radionuclides in imported foodstuffs in Iran. Iran. J. Radiat. Res., 4(3): 149-153.
   Direct Link
9. IAEA (International Atomic Energy Agency), 1989. Measurement of radiation in food and the environment. A guidebook. Technical Report Series No. 295, IAEA, Vienna.
   
10. ICRP (International Committee of Radiological Protection), 1995. Age-dependent doses to the members of the public from intake of radionuclides - part 5 compilation of ingestion and inhalation coefficients. ICRP Publication 72, Ann. ICRP, 26(1).
    Direct Link
11. James, J.P., B.N. Dileep, R.M. Mulla, R.M. Joshi, M.S. Vishnu, P.D. Nayak, P.M. Ravi and P.K. Sarkar, 2013. Evaluation of internal dose to members of the public at the Kaiga site, India, due to the ingestion of primordial radionuclide 40K. Radiat. Prot. Dosim., 153(1): 56-63.
    Direct Link
12. Khater, A.E.M. and W.F. Bakr, 2011. Technologically enhanced 210Pb and 210Po in iron and steel industry. J. Environ. Radioactiv., 102(5): 527-530.
    Direct Link
13. Kovalchuk, O., V. Titov, B. Hohn and I. Kovalchuk, 2001. A sensitive transgenic plant system to detect toxic inorganic compounds in the environment. Nat. Biotechnol., 19(6): 568-572.
    Direct Link
14. Kuwait Government, 2009. Kuwait Government, 2009. Kuwait Gazette, 5: 10.
    
15. Maul, P.R. and J.P. O'Hara, 1989. Background radioactivity in environmental materials. J. Environ. Radioactiv., 9(3): 265-80.
    Direct Link
16. Musa, M., Z. Hamzah and A. Saat, 2011. Measurement of natural radionuclides in the soil of Highlands agricultural farmland. Proceeding of the 3rd International Symposium and Exhibition in Sustainable Energy and Environment (ISESEE, 2011). Melaka, pp: 172-176.
    Direct Link
17. Nadal, M., N. Casacuberta, J. Garcia-Orellana, N. Ferré-Huguet, P. Masqué, M. Schuhmacher and J.L. Domingo, 2011. Human health risk assessment of environmental and dietary exposure to natural radionuclides in the Catalan stretch of the Ebro River, Spain. Environ. Monit. Assess., 175(1-4): 455-468.
    Direct Link
18. Patra, A.C., S. Mohapatra, S.K. Sahoo, P. Lenka, J.S. Dubey, V.K. Thakur, A.V. Kumar, P.M. Ravi and R.M. Tripathi, 2014. Assessment of ingestion dose due to radioactivity in selected food matrices and water near Vizag, India. J. Radioanal. Nucl. Ch., 300(3): 903-910.
    Direct Link
19. Scheibel, V., C.R. Appoloni and H. Schechter, 2006. Natural radioactivity traces in South-Brazilian cereal flours by gamma-ray spectrometry. J. Radioanal. Nucl. Ch., 270(1): 163-165.
    Direct Link
20. Shanthi, G., C.G. Maniyan, G.A.G. Raj and J.T.T. Kumaran, 2009. Radioactivity in food crops from high- background radiation area in southwest India. Curr. Sci., 97(9): 1331-1335.
    Direct Link
21. Singh, A., R.K. Sharma, M. Agrawal and F.M. Marshall, 2010. Health risk assessment of heavy metals via dietary intake of foodstuffs from the wastewater irrigated site of a dry tropical area of India. Food Chem. Toxicol., 48(2): 611-619.
    Direct Link
22. UNSCEAR, 1982. Ionization Radiations: Sources and Biological Effects. United Nations Scienti?c Committee on the Effects of Atomic Radiation, United Nations, New York.
    
23. UNSCEAR, 2000. Sources and Effects of Ionizing Radiation. United Nations Scientific Committee on the Effects of Atomic Radiation. UNSCEAR, New York.
    
24. UNSCEAR, 2008. Sources and Effects of Ionizing Radiation. Report to the General Assembly, United Nations Scientific Committee on Effects of Atomic Radiation, New York.
    
25. Venturini, L. and G.A. Sordi, 1999. Radioactivity in and committed effective dose from some Brazilian foodstuffs. Health Phys., 76(3): 311-313.
    Direct Link
26. WHO, 2006. Guidelines for Drinking-Water Quality. 1st Addendum to 3rd Edn., Volume 1, Recommendations. WHO, Geneva, Switzerland, pp: 595.
    
27. Zheng, J., K.H. Chen, X. Yan, S.J. Chen, G.C. Hu, X.W. Peng, J.G. Yuan, B.X. Mai and Z.Y. Yang, 2013. Heavy metals in food, house dust, and water from an e-waste recycling area in South China and the potential risk to human health. Ecotox. Environ. Safe., 96: 205-212.
    Direct Link
28. Zhuang, P., M.B. McBride, H. Xia, N. Li and Z. Li, 2009. Health risk from heavy metals via consumption of food crops in the vicinity of Dabaoshan mine, South China. Sci. Total Environ., 407(5): 1551-1561.
    CrossRef    PMid:19068266    Direct Link

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