| 摘要: |
| 采用共沉淀法分析测定了阳江核电站邻近海域2012—2013年海水样品总α、总β的放射性比活度、表层沉积物样品中总β的放射性比活度以及2013年生物样品中总β的放射性比活度。结果表明：2012—2013年两年间阳江核电站邻近海域海水中总α的放射性比活度范围为：0.083~0.205 Bq/L, 平均值为0.134 Bq/L；总β的放射性比活度范围为：0.029~0.059 Bq/L，平均值为0.043 Bq/L。与渤海、黄海、东海、珠江口等其他海域相比，阳江核电邻近海域总α、总β放射性比活度水平相对较低。2012—2013年阳江核电站邻近海域表层沉积物中总β的放射性比活度范围为：620~1 125 Bq/kg （干重），平均值为814 Bq/kg （干重）。与渤海、黄海、东海、珠江口等各海域沉积物相比，研究海域沉积物中总β的放射性比活度位于中等水平。2013年阳江核电站邻近海域生物样品总β的放射性比活度范围为：16.1~74.7 Bq/kg，平均值为39.4 Bq/kg，其中鱼类的总β平均值为64.6 Bq/kg，虾类的总β平均值为36.8 Bq/kg，贝类的总β平均值为16.7 Bq/kg，呈现鱼类>虾类>贝类的分布趋势。 |
| 关键词: 海洋环境科学 总α 总β 共沉淀 阳江核电站 |
| DOI：10.3969/J.ISSN.2095-4972.2020.03.014 |
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| 基金项目:国家海洋局南海分局局长基金资助项目（180104）；国家海洋公益性资助项目(201505005 6)；广东省自然科学基金资助项目（2017A030310592）；热带海洋环境国家重点实验室开放课题资助项目（LTO1709） |
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| Radioactivities of gross α and β in adjacent sea area of Yangjiang Nuclear Power Plant |
| WU Mei-gui,ZHAO Feng,ZHAO Li,GU He-quan,ZHOU Peng,LI Dong-mei,LOU Quan-sheng |
| (South China Sea Environmental Monitoring Center, SOA, Guangzhou 510300, China) |
| Abstract: |
| Gross α and gross β in seawater, sediments and organism samples collected in 2012 and 2013 from the adjacent sea area of Yangjiang Nuclear Power Plant were measured by coprecipitation method. The results showed that in 2012 and 2013 gross α in seawater averaged 0.134 (0.083-0.205) Bq/L. Gross β in seawater averaged 0.043 (0.029-0.059) Bq/L. The gross α and gross β levels were lower compared with those from other sea areas. In 2012 and 2013 gross β in surface sediments was 814 (620-1 125) Bq/kg in average. The gross β level was at middle level compared with those from other sea areas. In 2013 gross β in marine organisms averaged 39.4 (16.1-74.7) Bq/kg. The averages of gross β in fishes, shrimps and shellfishes were 64.6, 36.8 and 16.7 Bq/kg, respectively. |
| Key words: marine environmental science gross α gross β co-precipitation Yangjiang Nuclear Power Plant |
