Radioactivity in soils and some terrestrial foodstuffs from organic and conventional farming areas in Izmir, Turkey

摘要

The activity concentrations of the naturally occurring radionuclides of Po-210, Pb-210, Ra-226, Ra-228 and K-40 were determined in wheat, grape leaf, garlic, onion and soil samples collected from organic and conventional farms in the Izmir region. In addition, soil-to-plant transfer factors were estimated. While the activity concentrations of Po-210 and Pb-210 were determined by alpha spectrometry, those of Ra-226, Ra-228 and K-40, were determined by gamma spectrometry. The samples collected from conventional farms showed higher activity concentrations of the above radionuclides when compared to those collected from organic farms. In general, the transfer factor values fall within the range given in the literature.