ANNUAL COMMITTED EFFECTIVE DOSE FROM OLIVE OIL (DUE TO 238U, 232Th, AND 222Rn) ESTIMATED FOR MEMBERS OF THE MOROCCAN PUBLIC FROM INGESTION AND SKIN APPLICATION

Abstract

Olive oil is traditionally refined and widely consumed by Moroccan rural populations. Uranium (238U), thorium (232Th), radon (222Rn), and thoron (220Rn) contents were measured in various locally produced olive oil samples collected in rural areas of Morocco. These radionuclides were also measured inside various bottled virgin olive oils consumed by the Moroccan populations. CR-39 and LR-115 type II solid state nuclear track detectors (SSNTDs) were used. Annual committed effective doses due to 238U, 232Th, and 222Rn from the ingestion of olive oil by the members of the general public were determined. The maximum total committed effective dose due to 238U, 232Th, and 222Rn from the ingestion of olive oil by adult members of Moroccan rural populations was found equal to 5.9 µSv y-1. The influence of pollution due to building material dusts and phosphates on the radiation dose to workers from the ingestion of olive oil was investigated, and it was found that the maximum total committed effective dose due to 238U, 232Th, and 222Rn was on the order of 0.22 mSy y-1. Committed effective doses to skin due to 238U, 232Th, and 222Rn from the application of olive oil masks by rural women were evaluated. The maximum total committed effective dose to skin due to 238U, 232Th, and 222Rn was found equal to 0.07 mSy y-1 cm-2.

Measurement of238U,232Th and222Rn concentrations in different table oils samples. Determination of committed effective doses received by consumers following the ingestion of table oil.

“…It should be noted that all the table oil samples studied contain more thorium than uranium. This is because the soils on which soybean, rapeseed, sunflower, maize grow, contain more thorium than uranium [5].…”

“…The annual effective doses initiated of 238 U, 232 Th were evaluated in different foods using the International Commission on Radiological Protection (ICRP) using the dose coefficients by ingestion [4], in the different samples olive oil [5] and in oil and lubricant oil [6]. In this work, we use a method based on the use of nuclear solid trace detectors (SSNDs) to measure the concentrations of 238 U, 232 Th and 222 Rn in the various table oil samples in order to evaluate radiation doses received by consumers following ingestion of these table oils.…”

Untitled

“…Due to their presence in soil and phosphate fertilizers, primordial radionuclides and their progeny are Transmitted by water from the soil to olive tree roots, olives, and olive oil. It is necessary to measure the radionuclide concentrations of olive oil samples to assess potential radiation doses, and, if necessary, to take steps to protect consumers from radiation exposure [2]. One of the most prominent ingredients included in the diet is extra virgin olive oil (EVOO), which is characterized by its health benefits [3].…”

Measurement of 238U and 232Th in Petrol, Gas-oil and Lubricant Samples by Using Nuclear Track Detectors and Resulting Radiation Doses to the Skin of Mechanic Workers

“…As a result of oil and gas production, radioactive products from the 238 U and 232 Th series may be transported from the formation to the commercial gas and oil. Natural radionuclides enter the human body mainly by inhalation of radon ( 222 Rn) and thoron ( 220 Rn) gases and their decay products (Misdaq and Ouguidi 2011), by ingestion of primordial radionuclides and their progeny ( 40 K, 238 U, and 232 Th series) (Fisenne et al 1987;Misdaq and Touti 2012;Shiraishi et al 2000), and by application of various materials to skin (Misdaq and Outeqablit 2010;. , 228 Ra, and 210 Pb have been measured in oil and gas samples by using gammaray spectrometry (Landsberger et al 2013), although this technique needs the use of a certified liquid standard for establishing an efficiency curve.…”