影响莴苣和小麦样本中 238U、235U、232Th 和一些衰变产物放射性浓度的潜在来源。

Journal of Environmental Monitoring Pub Date : 2012-11-01 DOI:10.1039/c2em30434a

M Jeambrun, L Pourcelot, C Mercat, B Boulet, E Pelt, F Chabaux, X Cagnat, F Gauthier-Lafaye

{"title":"影响莴苣和小麦样本中 238U、235U、232Th 和一些衰变产物放射性浓度的潜在来源。","authors":"M Jeambrun, L Pourcelot, C Mercat, B Boulet, E Pelt, F Chabaux, X Cagnat, F Gauthier-Lafaye","doi":"10.1039/c2em30434a","DOIUrl":null,"url":null,"abstract":"The activity concentrations of radionuclides within the uranium and thorium series were determined in wheat and lettuce at five sites in France, and in their respective potential sources: crop soils of wheat and crop soils and irrigation waters of lettuce. These data were used to calculate concentration ratios and to enrich the database supported by the technical report series N°472 of the IAEA (2010). For wheat and lettuce, the activity concentrations were in the same range for all radionuclides studied, except for (210)Pb, which had higher activity concentrations in wheat, ranging between 1.3 and 11 Bq kg(−1) (fresh weight) as compared to 0.4 and 0.7 Bq kg(−1) (fresh weight) for lettuce. For wheat, the range of activity concentrations (mBq kg(−1); fresh weight) decreased as (210)Pb > (226)Ra (56–1511) ≈ (228)Ra (86–769) > (228)Th (19–176) ≈ (238)U (11–169) ≈ (234)U (12–150) ≈ (230)Th (9.08–197.18) ≈ (232)Th (8.61–121.45) > (235)U (0.53–7.9). For lettuce, it decreased as (228)Ra (<320–1221) > (210)Pb (409–746) > (226)Ra (30–599) ≈ (228)Th (<29–347) > (238)U (8–120) ≈ (234)U (8–121) ≈ (230)Th (5.21–134.63) ≈ (232)Th (5.25–156.99) > (235)U (0.35–5.63). The species differences may reflect different plant physiologies. Through the study of activity ratios of wheat and lettuce in relation with those of the various radionuclide sources it has been possible to highlight the contribution of the main sources of natural radionuclides. Indeed, irrigation water when the uranium concentration is enhanced (>30 mBq L(−1)) contributed significantly to the activity concentration of uranium in lettuces. Concerning the high activity concentrations of (210)Pb, it could be explained by atmospheric particle deposition. The effect of soil particles resuspension and their adhesion to the plant surface seemed to be important in some cases. The soil-to-plant transfer factors were calculated for lettuce and wheat. The values were lower in wheat than in lettuce except for (210)Pb which had similar values in the two species (0.11–0.13 respectively). For both species, (210)Pb followed by (228)Ra (0.015–0.10) and (226)Ra (0.010–0.051) displayed the highest transfer factor, whereas (238)U had intermediate values (0.0015–0.030) and (232)Th exhibited the lowest (0.0014–0.013).","PeriodicalId":50202,"journal":{"name":"Journal of Environmental Monitoring","volume":"14 11","pages":"2902-12"},"PeriodicalIF":0.0000,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1039/c2em30434a","citationCount":"22","resultStr":"{\"title\":\"Potential sources affecting the activity concentrations of 238U, 235U, 232Th and some decay products in lettuce and wheat samples.\",\"authors\":\"M Jeambrun, L Pourcelot, C Mercat, B Boulet, E Pelt, F Chabaux, X Cagnat, F Gauthier-Lafaye\",\"doi\":\"10.1039/c2em30434a\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The activity concentrations of radionuclides within the uranium and thorium series were determined in wheat and lettuce at five sites in France, and in their respective potential sources: crop soils of wheat and crop soils and irrigation waters of lettuce. These data were used to calculate concentration ratios and to enrich the database supported by the technical report series N°472 of the IAEA (2010). For wheat and lettuce, the activity concentrations were in the same range for all radionuclides studied, except for (210)Pb, which had higher activity concentrations in wheat, ranging between 1.3 and 11 Bq kg(−1) (fresh weight) as compared to 0.4 and 0.7 Bq kg(−1) (fresh weight) for lettuce. For wheat, the range of activity concentrations (mBq kg(−1); fresh weight) decreased as (210)Pb > (226)Ra (56–1511) ≈ (228)Ra (86–769) > (228)Th (19–176) ≈ (238)U (11–169) ≈ (234)U (12–150) ≈ (230)Th (9.08–197.18) ≈ (232)Th (8.61–121.45) > (235)U (0.53–7.9). For lettuce, it decreased as (228)Ra (<320–1221) > (210)Pb (409–746) > (226)Ra (30–599) ≈ (228)Th (<29–347) > (238)U (8–120) ≈ (234)U (8–121) ≈ (230)Th (5.21–134.63) ≈ (232)Th (5.25–156.99) > (235)U (0.35–5.63). The species differences may reflect different plant physiologies. Through the study of activity ratios of wheat and lettuce in relation with those of the various radionuclide sources it has been possible to highlight the contribution of the main sources of natural radionuclides. Indeed, irrigation water when the uranium concentration is enhanced (>30 mBq L(−1)) contributed significantly to the activity concentration of uranium in lettuces. Concerning the high activity concentrations of (210)Pb, it could be explained by atmospheric particle deposition. The effect of soil particles resuspension and their adhesion to the plant surface seemed to be important in some cases. The soil-to-plant transfer factors were calculated for lettuce and wheat. The values were lower in wheat than in lettuce except for (210)Pb which had similar values in the two species (0.11–0.13 respectively). For both species, (210)Pb followed by (228)Ra (0.015–0.10) and (226)Ra (0.010–0.051) displayed the highest transfer factor, whereas (238)U had intermediate values (0.0015–0.030) and (232)Th exhibited the lowest (0.0014–0.013).\",\"PeriodicalId\":50202,\"journal\":{\"name\":\"Journal of Environmental Monitoring\",\"volume\":\"14 11\",\"pages\":\"2902-12\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2012-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1039/c2em30434a\",\"citationCount\":\"22\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Environmental Monitoring\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1039/c2em30434a\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Environmental Monitoring","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1039/c2em30434a","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 22

摘要

在法国的五个地点测定了小麦和莴苣中铀和钍系列放射性核素的放射性浓度，以及它们各自的潜在来源：小麦的作物土壤和莴苣的作物土壤和灌溉水。这些数据用于计算浓度比，并充实国际原子能机构（IAEA）第 472 号技术报告系列所支持的数据库（2010 年）。就小麦和莴苣而言，所研究的所有放射性核素的放射性活度浓度范围相同，但(210)铅除外，小麦的放射性活度浓度较高，在1.3至11 Bq kg(-1)（鲜重）之间，而莴苣的放射性活度浓度在0.4至0.7 Bq kg(-1)（鲜重）之间。小麦的放射性活度浓度范围（毫微克/千克（-1）；鲜重）依次为：(210)Pb > (226)Ra (56-1511) ≈ (228)Ra (86-769) > (228)Th (19-176) ≈ (238)U (11-169) ≈ (234)U (12-150) ≈ (230)Th (9. 08-197.18) ≈ (238)U (11-169) ≈ (234)U (12-150) ≈ (230)Th (9. 08-197.18) 。(232)Th(8.61-121.45)>(235)U(0.53-7.9)。在莴苣中，其下降过程为 (228)Ra ( (210)Pb (409-746) > (226)Ra (30-599) ≈ (228)Th ( (238)U (8-120) ≈ (234)U (8-121) ≈ (230)Th (5.21-134.63) ≈ (232)Th (5.25-156.99) > (235)U (0.35-5.63)。物种差异可能反映了不同的植物生理机能。通过研究小麦和莴苣的放射性活度比与各种放射性核素源的放射性活度比之间的关系，可以突出天然放射性核素主要来源的贡献。事实上，铀浓度较高（>30 mBq L(-1)）时的灌溉水对莴苣中铀的活度浓度有很大影响。关于 (210)Pb 的高活性浓度，可以用大气颗粒沉积来解释。在某些情况下，土壤颗粒的再悬浮及其对植物表面的附着似乎也有重要影响。计算了莴苣和小麦的土壤-植物转移因子。除了 (210)Pb 在两种植物中的值相似（分别为 0.11-0.13）外，小麦的值低于莴苣。在这两种物质中，(210)铅的转移因子最高，其次是(228)镭（0.015-0.10）和(226)镭（0.010-0.051），而(238)铀的转移因子处于中间值（0.0015-0.030），(232)钍的转移因子最低（0.0014-0.013）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Potential sources affecting the activity concentrations of 238U, 235U, 232Th and some decay products in lettuce and wheat samples.

The activity concentrations of radionuclides within the uranium and thorium series were determined in wheat and lettuce at five sites in France, and in their respective potential sources: crop soils of wheat and crop soils and irrigation waters of lettuce. These data were used to calculate concentration ratios and to enrich the database supported by the technical report series N°472 of the IAEA (2010). For wheat and lettuce, the activity concentrations were in the same range for all radionuclides studied, except for (210)Pb, which had higher activity concentrations in wheat, ranging between 1.3 and 11 Bq kg(−1) (fresh weight) as compared to 0.4 and 0.7 Bq kg(−1) (fresh weight) for lettuce. For wheat, the range of activity concentrations (mBq kg(−1); fresh weight) decreased as (210)Pb > (226)Ra (56–1511) ≈ (228)Ra (86–769) > (228)Th (19–176) ≈ (238)U (11–169) ≈ (234)U (12–150) ≈ (230)Th (9.08–197.18) ≈ (232)Th (8.61–121.45) > (235)U (0.53–7.9). For lettuce, it decreased as (228)Ra (<320–1221) > (210)Pb (409–746) > (226)Ra (30–599) ≈ (228)Th (<29–347) > (238)U (8–120) ≈ (234)U (8–121) ≈ (230)Th (5.21–134.63) ≈ (232)Th (5.25–156.99) > (235)U (0.35–5.63). The species differences may reflect different plant physiologies. Through the study of activity ratios of wheat and lettuce in relation with those of the various radionuclide sources it has been possible to highlight the contribution of the main sources of natural radionuclides. Indeed, irrigation water when the uranium concentration is enhanced (>30 mBq L(−1)) contributed significantly to the activity concentration of uranium in lettuces. Concerning the high activity concentrations of (210)Pb, it could be explained by atmospheric particle deposition. The effect of soil particles resuspension and their adhesion to the plant surface seemed to be important in some cases. The soil-to-plant transfer factors were calculated for lettuce and wheat. The values were lower in wheat than in lettuce except for (210)Pb which had similar values in the two species (0.11–0.13 respectively). For both species, (210)Pb followed by (228)Ra (0.015–0.10) and (226)Ra (0.010–0.051) displayed the highest transfer factor, whereas (238)U had intermediate values (0.0015–0.030) and (232)Th exhibited the lowest (0.0014–0.013).

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Journal of Environmental Monitoring 环境科学-分析化学

自引率

0.00%

发文量

审稿时长

2.3 months