تقييم المخاطر الإشعاعية للنويدات المشعة في عينات مختلفة من التوابل في الأسواق العراقية

Rp: Evaluation of the Radiological Risks of Radionuclides in Different Samples of Seasoning in Iraqi Markets pdf.

Seasoning (Spice) is one of the main ingredients commonly used In all Iraq Kitchens which is products of tropical plants and maybe bark, roots, buds, fruit, or other parts. It may be contained in the concentrations of some radiation radioactivity nuclides that product from nuclear series, such as uranium-238 series and thorium-232 in addition to the isotope potassium-40. Knowledge of radioactivity levels in human diet is of particular concern for the estimation of possible radiological hazards to human health.
The 57 spices samples collected from several Iraqi markets to measure natural radionuclides. Gamma-ray emitters (238U, 232Th, and 40K) and alpha emitters (222Rn,226Ra, and 238U) measured by gamma-ray spectroscopy and solid-state nuclear track detector, respectively. As well as, radiological risks due to gamma and alpha emitters of samples determined.
The results of gamma emitter show: the average values of the specific activity (S.A) for 238U, 232Th, and 40K,were12.052±1.247Bq/kg,8.760±0.650Bq/kg,and256.924±5.966Bq/kg respectively ,while the global limit according to UNSCEAR for(238U, 232Th, and 40K) are 33 Bq/kg, 45 Bq/kg, and420 Bq/kg ,It is found that all values of 238Uand 232Th the specific activities were less than the worlds average. While all values of specific activity of 40K, that less than worlds average, with the exception of( Coriander origin of Syria) and (Chamomile origin of India) samples were only found to be higher than the worldwide average (420 Bq/kg),Also the result of Radium Equivalent Activity (Raeq) and Internal hazard index (Hin) are 44.315,0.152 respectively , Also, the average values of the total annual effective dose (AED) due to gamma emitters is 0.0128mSv/y, The average values of threshold consumption rate (DIthresh) is 53.917 kg/y, Also the average of Hereditary Cancer Risk (HCR) is 0.0351×10-3 ,the average value of Fatal Cancer Risk(FCR) is 0.0439×10-3, all these value of gamma emitter less than worlds average.
The results of alpha emitter show: the average of concentration of Radon (CRn) is 0.258 Bq/kg,the average of concentration of Radium (CRa) is 0.0164 Bq/kg, the average of concentration of uranium (CU) is 0.264 Bq/kg ,Also The annual average internal dose (Total AAIED) is 0.0300 µSv/y, The average risk of an excess cancer fatality per million person (RECFPMP) is 0.0097 all these value less than worlds average. At last, that natural radioactivity levels (gamma and alpha emitters) together with radiological hazard risk from through comparison with the permissible global limits, as well as comparison with previous local and international studies, it was concluded that the 57 samples of spices that were studied do not cause any danger to the human health when its consumption.