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Natural radionuclide concentrations in processed materials from Thai mineral industries
The naturally occurring radioactive materials (NORMs) distributed in products, by-products and waste produced from Thai mineral industries were investigated. Samples were analysed for radioactivity concentrations of two principal NORM isotopes: (226)Ra and (228)Ra. The enrichment of NORM was found t...
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| Published in: | Radiation protection dosimetry 2012-11, Vol.152 (1-3), p.71-75 |
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| Main Authors: | , , , , , |
| Format: | Article |
| Language: | English |
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| cites | cdi_FETCH-LOGICAL-c287t-61f54f62d06870a185c6a6dc7c8df2adfca85261f43cb63dedf9d351c1e16d4e3 |
| container_end_page | 75 |
| container_issue | 1-3 |
| container_start_page | 71 |
| container_title | Radiation protection dosimetry |
| container_volume | 152 |
| creator | Chanyotha, S Kranrod, C Chankow, N Kritsananuwat, R Sriploy, P Pangza, K |
| description | The naturally occurring radioactive materials (NORMs) distributed in products, by-products and waste produced from Thai mineral industries were investigated. Samples were analysed for radioactivity concentrations of two principal NORM isotopes: (226)Ra and (228)Ra. The enrichment of NORM was found to occur during the treatment process of some minerals. The highest activity of (226)Ra (7 × 10(7) Bq kg(-1)) was in the scale from tantalum processing. The radium concentration in the discarded by-product material from metal ore dressing was also enriched by 3-10 times. Phosphogypsum, a waste produced from the production of phosphate fertilisers, contained 700 times the level of (226)Ra concentration found in phosphate ore. Hence, these residues were also sources of exposure to workers and the public, which needed to be controlled. |
| doi_str_mv | 10.1093/rpd/ncs185 |
| format | article |
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Samples were analysed for radioactivity concentrations of two principal NORM isotopes: (226)Ra and (228)Ra. The enrichment of NORM was found to occur during the treatment process of some minerals. The highest activity of (226)Ra (7 × 10(7) Bq kg(-1)) was in the scale from tantalum processing. The radium concentration in the discarded by-product material from metal ore dressing was also enriched by 3-10 times. Phosphogypsum, a waste produced from the production of phosphate fertilisers, contained 700 times the level of (226)Ra concentration found in phosphate ore. 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| fulltext | fulltext |
| identifier | ISSN: 0144-8420 |
| ispartof | Radiation protection dosimetry, 2012-11, Vol.152 (1-3), p.71-75 |
| issn | 0144-8420 1742-3406 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1220571603 |
| source | Oxford Journals Online |
| subjects | Calcium Sulfate - analysis Calibration Fertilizers Geography Humans Industrial Waste Industry Metals - analysis Minerals - analysis Phosphates Phosphorus - analysis Radiation Monitoring - methods Radioactive Pollutants - analysis Radioactive Waste - analysis Radioisotopes - analysis Radium - analysis Soil Pollutants, Radioactive - analysis Tantalum - analysis Thailand |
| title | Natural radionuclide concentrations in processed materials from Thai mineral industries |
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