乐山市江河两岸土壤中放射性核素含量调查  

Survey on Radionuclide Content of Soil at the Two Sides of Rivers in Leshan City

作　　者：张秀莲[1] 贺良国[2] 董强[1] 江顿涛[1] 张雨东[1] 史文晋[1] 

机构地区：[1]乐山市疾病预防控制中心,四川乐山614000 [2]四川省疾病预防控制中心,四川成都610041

出　　处：《职业卫生与病伤》2008年第6期339-341,共3页Occupational Health and Damage

基　　金：乐山市重点科技计划项目(07SZD172)

摘　　要：目的调查江河两岸土壤中放射性核素含量,健全乐山市放射性本底资料,为核辐射事故应急措施提供科学依据。方法按照国家标准规定的分析方法,采用美国ORTEC公司生产的ADCAMTM918型γ谱仪进行检测分析。结果江河两岸土壤中天然放射性核素238U、235U、232Th、226Ra、40K的含量分别为55.3、2.0、46.2、45.9和490.9Bq/kg,人工放射性核素137Cs含量为3.0Bq/kg。A、B江河岸之间及分为上中下段统计土壤中放射性核素含量差异无统计学意义。结论A江与B河两岸土壤中放射性核素含量无统计学差异,其中U和Ra含量相对高于全国平均值,可能与地质结构有关。人工放射性核素137Cs含量平均值小于对照岷江河岸,说明乐山市江河两岸土壤人工放射性无特殊。Objective To investigate the radior/uclide content of the soil at two sides of rivers in Leshan City, and to improve the city of radioactive background information, so as to provide the scientific basis for the prevention measures of nuclear radiation emergency. Method ORTEC ADCAM^TM 918 γ-ray spectrometer was used to detect. Results Radionuclide ^238U, ^235U, ^232Th, ^226Ra and ^40K＇s contents in the natural soil were 55.3, 2. O, 46. 2, 45. 9 and 490. 9 Bq. kg^-1, and 137 Cs radionuclide content was 3.0 Bq. kg^-1. Between A and B river bank, t-tested show that the radionuclide content of soil had no statistic differences. Conclusion Radionuclide content of the soil has no differences in A and B rivers banks, U and Ra is relatively higher than the national average, and this may be related to geological structure. Artificial radionuclide ^137Cs is less than that in the contrastive Minjiang River, and it indicates that artificial radioactivity in soil of rivers in Leshan without speciality.

关 键 词：土壤 天然放射性核素 人工放射性核素 放射性核素含量 

分 类 号：X591[环境科学与工程—环境工程]