深圳近岸海域海水及沉积物中放射性核素水平  

Radionuclides in Seawater and Sediments From Near-Shore Area of Shenzhen

作　　者：丁敏霞 刘国卿 苏玲玲 冯江平 时劲松 罗奇 

机构地区：[1]深圳大学物理与能源学院核技术应用研究所,广东深圳518060 [2]深圳市核与辐射管理中心,广东深圳518049

出　　处：《核化学与放射化学》2017年第6期442-446,共5页Journal of Nuclear and Radiochemistry

基　　金：广东省自然科学基金资助项目(2016A030313037);深圳市科技研发资金资助项目(JCYJ20150324141711585);深圳市人居环境委专项资金资助项目(0851-1361S200C262)

摘　　要：采集并分析了深圳近岸海域海水和沉积物中放射性核素的水平。结果表明,海水中226 Ra、232 Th、40 K和137 Cs的活度浓度分别为12.8~42.6Bq/m3(平均值为(24.2±8.6)Bq/m3)、3.2~15.6Bq/m3(平均值为(8.8±3.6)Bq/m3)、529.7~974.1Bq/m3(平均值为(786.4±158.4)Bq/m3)和1.7~3.7Bq/m3(平均值为(2.6±0.7)Bq/m3);沉积物中226 Ra、232 Th、40 K和137 Cs的比活度分别为17.9~35.0Bq/kg(平均值为(26.5±5.4)Bq/kg)、32.9~59.8Bq/kg(平均值为(43.2±9.1)Bq/kg)、326.2~415.3Bq/kg(平均值为(364.2±32.4)Bq/kg)和0.9~3.5Bq/kg(平均值为(1.8±0.8)Bq/kg);海水及沉积物中110 Agm的含量均低于检测限。深圳近岸海域海水和沉积物中放射性核素水平与我国其它海域相当,未见大亚湾海域海水及沉积物放射性核素含量异常。In this study,seawater and sediment were collected from the near-shore area of Shenzhen and analyzed for radionuclides.The results indicate that,the radioactive concentration of 226 Ra,232 Th,40 K and 137 Cs in the seawater are in the range of 12.8-42.6 Bq/m3(averaged(24.2±8.6)Bq/m3),3.2-15.6 Bq/m3(averaged(8.8±3.6)Bq/m3),529.7-974.1 Bq/m3(averaged(786.4±158.4)Bq/m3)and 1.7-3.7 Bq/m3(averaged(2.6±0.7)Bq/m3),respectively.In the sediment,the specific activity are in the range of 17.9-35.0 Bq/kg(averaged(26.5±5.4)Bq/kg),32.9-59.8 Bq/kg(averaged(43.2±9.1)Bq/kg),326.2-415.3 Bq/kg(averaged(364.2±32.4)Bq/kg)and 0.9-3.5 Bq/kg(averaged(1.8±0.8)Bq/kg),respectively.The radioactive concentrations of 110 Agmin the seawater and sediment are all below the detection limit.The radioactive concentration of these radionuclides fall in the range of those obtained from other near-shore areas of China,and no abnormal radioactivity nuclide level are observed in seawater and sediment samples from Daya Bay.

关 键 词：放射性核素 海水 沉积物 深圳近岸海域 

分 类 号：P736.21[天文地球—海洋地质]