Activity concentrations of 226Ra, 232Th, 40K and 137Cs radionuclides in Turkish medicinal herbs, their ingestion doses and cancer risks
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Date
2014-11
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Taylor and Francis
Abstract
Twenty-two medicinal herb samples, each representing a distinct species, were collected from Turkish markets and measured by the gamma spectrometric method. The activity concentration of 226Ra in medicinal herbs was found in the range of minimum detectable activity (MDA) and 15.1 ± 2.2 Bqkg−1. The activity concentration of 232Th ranged from MDA values to 3.5 ± 0.8 Bqkg−1. The activity concentration of 40K varied between 50.0 ± 16.8 and 1311.5 ± 57.3 Bqkg−1. All 137Cs activity concentrations of medicinal herbs were found to have lower than MDA values. The bone surface dose, lower large intestine and colon doses were found to be 182.9, 18.8 and 18.7 µSvy−1, respectively. The highest committed effective dose originated from the annual ingestion of 1 kg medicinal herb was calculated notably low as 9.0 µSv. The cancer risk of ingestion of medicinal herbs was found to be small enough to be neglected. The selected Turkish medicinal herbs are considered safe for human consumption.
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Keywords
Activity concentration, Aktivite konsantrasyonu, Radionuclide, Radyonüklid, Gamma spectrometry, Gama spektrometresi, Medicinal herb, Tıbbi bitki, Ingestion dose, Yutma dozu, Cancer risk, Kanser riski
Citation
Parmaksız, A. ve Ağuş, Y. (2014). Activity concentrations of 226Ra, 232Th, 40K and 137Cs radionuclides in Turkish medicinal herbs, their ingestion doses and cancer risks. Radiation Effects and Defects in Solids , 169(11), 980-988.