Gross alpha, gross beta and activity concentration of Ra-226 in some fertilizers commonly used in the south of Vietnam and health risk due to radionuclides transferred from fertilizers to food crops

摘要

Twelve types of chemical fertilizers commonly used in the south of Vietnam were collected for analysis. It was found that the activity concentration of Ra-226 was in the range from below detectable level (BDL) to 139 Bq kg(-1) while gross alpha and gross beta activities were in the ranges from BDL-691 Bq kg(-1) and BDL-18753 Bq kg(-1) respectively. The correlation was found between gross alpha activity and activity concentration of Ra-226 in most of fertilizers. The radiological hazard due to application of fertilizers is insignificantly under the agricultural conditions.