Analysis of internal exposure associated with consumption of crops and groundwater from the high background radiation area of Mrima Hill, Kenya
| Autor: | N. O. Hashim, M. W. Chege, A. S. Merenga, Jochen Tschiersch |
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| Rok vydání: | 2015 |
| Předmět: |
Crops
Agricultural Radioisotopes Radiation Radiological and Ultrasound Technology Public Health Environmental and Occupational Health Administration Oral General Medicine Feeding Behavior Radiation Exposure Radiation Dosage Effective dose (radiation) Risk Assessment Whole-Body Counting Animal science Radiation Monitoring Environmental science Ingestion Background Radiation Humans Radiology Nuclear Medicine and imaging Food Contamination Radioactive Groundwater Food Analysis |
| Zdroj: | Radiation protection dosimetry. 167(1-3) |
| ISSN: | 1742-3406 |
| Popis: | Specific concentrations of (226)Ra, (232)Th and (40)K were measured in cassava tubers, cassava leaves and groundwater obtained from the high background radiation area of Mrima hill and used in the evaluation of the ingested dose. Cassava tubers, cassava leaves and groundwater registered average (226)Ra concentrations of 60 ± 5, 141 ± 11 and 4.3 ± 0.3 Bq kg(-1), respectively. (232)Th was not detected in cassava leaves although it was present in cassava tubers as well as in groundwater in average concentrations of 35.3±61.5 and 2.0±0.1 Bq kg(-1), respectively. (40)K was present in all samples in average concentrations of 842±539 Bq kg(-1) in cassava tubers, 1708 ± 552 Bq kg(-1) in cassava leaves and 91.4 Bq kg(-1) in groundwater. The total annual effective dose due to ingestion was found to be 7.9 mSv y(-1) of which 2.4 mSv y(-1) was due to cassava tubers, 3.8 mSv y(-1) due to cassava leaves and 1.7 mSv y(-1) due to water. |
| Databáze: | OpenAIRE |
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