乐山市食品中放射性核素含量及其所致居民有效待积剂量当量  

Radionuclide Content in Food in Leshan City and Resident Committed Dose Equivalent

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335-338,共4页Occupational Health and Damage

基　　金：乐山市重点科技计划项目(07SZD172)

摘　　要：目的调查乐山市食品中放射性核素含量,并估算其所致居民有效待积剂量当量。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。结果对乐山市主要粮食和蔬菜进行了6种放射性核素的检测,其活度大小依次为40K(238U(226Ra(232Th(235U(137Cs。居民从稻谷、麦类、玉米、豆类食物和蔬菜摄入天然放射性核素成年男女分别为16963.5、15800.6Bq/a,所致有效待积剂量当量202.2、158.9μSv。摄入人工放射性核素137Cs成年男、女分别为30.9、24.0Bq/a,所致有效待积剂量当量0.883、0.802μSv。结论乐山市主要食品中U、Th、Ra、K天然放射性核素含量及所致居民的有效待积剂量当量,相对高于国内相关调查资料报道的正常地区平均值,仍属天然辐射水平。人工放射性核素137Cs含量在世界大气沉降范围。Objective To investigate the radionuclide content in the food in Leshan, and to estimate resident committed dose equivalent. Method ORTEC ADCAM^TM 918 γ-ray spectrometer was used to detect and analysis. Results Six kinds of radionuelide in paddy, maize, beans and vegetables were detected. The content in order was successively ^40K 〉^238U 〉 ^226Ra 〉 ^232Th 〉 ^235U 〉 ^137Cs . The adult male and female from corn, wheat, beans food and vegetables took in annually the amount of natural radionuclide of 16963.5 and 15800. 6Bq. a^-1, respectively; with the committed dose equivalent of 202.2, 158.9μSv, and annually The amount of 137Cs of 30.9, 24.0 Bq.a^-1, respectively; with the committed dose equivalent of 0.883, 0. 802μSv . Conclusion The natural radionuclide U, Th, Ra, K contents in foods from the surrounding environment of Leshan and environment committed dose equivalent are higher than that in other areas in our country,The manual radionuclide ^137Cs content subsides in the range of world atmosphere.

关 键 词：居民 粮食 蔬菜 放射性核素 摄入量 待积剂量 

分 类 号：X591[环境科学与工程—环境工程]