Abstract: In this work, the impacts of TENORM (Technologically Enhanced Naturally Occuring Radioactive Materials) from fertilizer on soil and vegetable were estimated. The activity concentration of the natural radionuclides and then the annual effective dose rate due to ingestion of vegetable in the crops using fertilizers at the agricultural zone of Hoc Mon, Ho Chi Minh City, Viet Nam were investigated. The results showed that the soil after harvesting has the reduced total activity, except for the area which has the content increase of 238U, 226Ra and 210Pb from over 45% (for 226Ra) to 73% (for 238U) due to using phosphorus fertilizer containing a large amount of radioactive 226Ra (111.3 Bq kg-1) and 238U (46.5 Bq kg-1). In general, the equivalent radium activity of the soil after a harvest is less than the limit of 370 Bq kg-1 given by UNSCEAR 2000 at the surveyed time. It proved that there are no signs of radioactive residues in agricultural land due to using fertilizer in the surveyed area after a crop. The values of the annual effective dose due to ingestion are still less than 1 mSv/y in all cases of surveyed vegetables. It can be concluded that the radiological impact on the surveyed vegetables is negligible.
Keywords: Annual effective dose rate; Fertilizer; HPGe gamma spectrometer; Radioactivity; Soil; Vegetable.
Trang chủ VINANST VINANST-13 Study the impacts of TENORM from fertilizer on soil and vegetable and...