| 刘庆芬,诸洪达.天然放射性核素及其化学类似元素从土壤向人体的转移[J].中华放射医学与防护杂志,2004,24(3):217-219 |
| 天然放射性核素及其化学类似元素从土壤向人体的转移 |
| Transfer of natural radionuclides and their chemically similar elements from soil to human body |
| 投稿时间：2003-08-04 |
| DOI： |
| 中文关键词: 天然放射性核素转移 土壤 膳食摄入量 关键器官 |
| 英文关键词:Natural radionuclide transfer Soil Dietary intake Critical organ |
| 基金项目:国家自然科学基金资助项目(39970234) |
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| 中文摘要: |
| 目的 计算天然放射性核素从土壤经膳食向人体的转移系数, 和碱土与碱金属元素在转移中的DF(或OR).方法 依据我国4个膳食类型地区食品和52例尸体样品元素分析所获成年男子膳食摄入量和器官组织负荷量以及全国土壤背景值, 按照UNSCEAR环境转移模式计算元素转移系数、DF和OR.结果 232Th238U、226Ra、87Rb和40K由土壤向膳食进而向人体转移系数都依此递增, 范围分别为(0.092～40.7)Bq·a-1/Bq·kg-1和(3.58×10-3～6.34)Bq·a-1/Bq·kg-1.碱土元素与Pb从土壤向骨骼和碱金属元素向全身的OR范围分别为3.77×10-4～2.39×10-2和2.52×10-2～9.39×10-1.结论 本文所得P34都比P23低。碱土元素从土壤膳食骨骼转移DF都小于1,Pb的DF在Sr和Ba之间。碱金属元素Rb和Cs从土壤向膳食转移DF小于1,由膳食向肌肉组织或全身转移的DF大于1,Na则相反。 |
| 英文摘要: |
| Objective To calculate transfer coefficients of natural radionuclides from soil via diet to human body and DFs or ORs of alkaline earth and alkaline metal elements in these transfers. Methods Based on results of dietary intakes and organ or tissue burdens for Chinese adult man by elemental analyzing food and organ or tissue samples of 52 autopsy subjects,collected from 4 areas with different dietary types in China,along with national elemental background values in soil,their transfer coefficients and DFs and ORs were calculated by using the UNSCEAR model. Results The transfer coefficients from soil to diet and then to whole body for 232 Th,238 U, 226 Ra, 87 Rb and40 K were all increasing successively,ranging from (0.092～40.7)Bq·a -1 Bq·kg-1 and (3.58×10-3 ～6.34)Bq·a -1 Bq·kg-1 ,respectively.The ORs of alkaline earth elements with Pb from soil to skeleton randed from 3.77×10-4 to 2.39×10-2 and those of alkaline metals from soil to whole body,2 52×10-2 ～9.39×10 -1 . Conclusion The obtained P34 are all less than P23 .DFs of alkaline earth from soil via diet to skeleton are all less than 1 and DFs of Pb are somewhat between Sr and Ba.For alkaline metal element,DFs of Rb and Cs from soil to diet are less than 1 and those from diet to muscle or whole body are more than 1.However,the situation of Na is just the opposite. |
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