珠江口、大鹏湾和大亚湾海域海水及沉积物中放射性核素水平  

Study on radionuclide concentrations in seawater and sediments from the Pearl River estuary,Dapeng Bay and Daya Bay

作　　者：丁敏霞 刘国卿 冯江平 时劲松 罗奇 郭志明[3] 

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]深圳市环境监测中心站,广东深圳518049 [3]中国辐射防护研究院,太原030006

出　　处：《辐射防护》2017年第6期453-458,共6页Radiation Protection

基　　金：深圳市科技研发资金(JCYJ20150324141711585);深圳市人居环境委专项资金(0851-1361S200C262)

摘　　要：本文报道了珠江口、大鹏湾和大亚湾海域海水及沉积物中放射性核素水平。经2013年9月秋季航次和2014年4月冬季航次取样监测,珠江口、大鹏湾和大亚湾海域海水中226Ra、232Th、40K和137Cs的放射性活度浓度分别为12.8~42.6 Bq/m^3(平均21.7±7.3 Bq/m^3)、3.2~26.6 Bq/m^3(平均11.8±6.5 Bq/m^3)、529.7~974.1 Bq/m^3(平均820.6±120.0 Bq/m^3)和0.5~3.8 Bq/m^3(平均2.3±1.0 Bq/m^3);沉积物中226Ra、232Th、40K和137Cs的放射性活度浓度分别为16.9~35.0 Bq/kg(平均27.9±7.2 Bq/kg)、22.0~59.8 Bq/kg(平均36.5±11.1 Bq/kg)、326.2~621.0 Bq/kg(平均456.2±100.1 Bq/kg)和0.3~3.5 Bq/kg(平均1.5±0.7 Bq/kg);海水及沉积物中110mAg的含量均低于检测限。珠江口、大鹏湾和大亚湾海域海水及沉积物中放射性核素水平与我国其它海域相当。The concentrations of radionuclides in seawater and sediment samples from the Pearl River Estuary,Dapeng Bay and Daya Bay in Shenzhen were reported.During the cruises in September 2013 and April 2014,seawater and sediment samples were collected and analyzed for226 Ra,232 Th,40 K,137 Cs and110 m Ag.The activity concentrations of226 Ra,232 Th,40 K and137 Cs in the seawater were 12.8—42.6 Bq/m^3（ averaged 21.7± 7.3 Bq/m^3）,3.2—26.6 Bq/m^3（ averaged 11.8 ± 6.5 Bq/m^3）,529.7—974.1 Bq/m^3（ averaged 820.6 ±120.0 Bq/m^3）,and 0.5—3.8 Bq/m^3（ averaged 2.3 ± 1.0 Bq/m^3）,respectively.They were 16.9—35.0 Bq/kg（ averaged 27.9 ± 7.2 Bq/kg）,22.0—59.8 Bq/kg（ averaged 36.5 ± 11.1 Bq/kg）,326.2—621.0 Bq/kg（ averaged 456.2 ± 100.1 Bq/kg）, and 0.3—3.5 Bq/kg（ averaged 1.5 ± 0.7 Bq/kg） in the sediment.The activity concentrations of110 mAg were below the detection limit for all the samples.The concentration levels of these radionuclides in this area were about the same as other near-shore areas in China.

关 键 词：放射性核素 海水 沉积物 珠江口 大鹏湾 大亚湾 

分 类 号：X55[环境科学与工程—环境工程] X591