南极长城、中山两站近海和中国近海放射性水平的比较研究

A COMPARISON OF THE RADIOACTIVITY LEVELS IN THE COASTAL WATERS BETWEEN THE GREAT WALL AND ZHONGSHAN STATIONS IN ANTARCTICA AND THE POHAI, HUANGHAI, EAST CHINA AND SOUTH CHINA SEAS IN CHINA

研究比较南极长城、中山两站近海和中国的勃、黄、东、南四大海区近海沉积物和植物中的放射性水平。研究结果表明,南极长城、中山两站近海及沿岸的沉积物和植物,其放射性水平均低于中国四大海区。其中,沉积物中总β放射性活度的大小为:东海>南海>渤海>黄海>南极长城湾,海洋植物中^(238)U、^(232)Th、^(226)Ra、^(40)K、和总β的含量大小为:南海大亚湾>东海杭州湾>南极长城湾。说明南极近海区放射性水平,尤其是人工放射性水平除^(137)Cs外要比中国近海区低。

A comparison of radioactivity levels in the coastal sediments and plants between the Great Wall and Zhongshan Stations in Antarctica and the four seas(i. e. the Pohai Sea, Huanghai Sea, East China Sea and South China Sea)in China shows that in general the radioactivity levels in the coastal sediments and plants in Antarctica are lower than those in the four seas in China. The contens of the total β in the sediments decrease from higher to lower in amount in the order of East China Sea, South China Sca. Pohai Sea. Huanghai Sea and the Great Wall Bay in Antarctica succesively, but the contents of ^(238)U, ^(232)Th, ^(226)Ra, ^(40)K and the total β in marine plants decrease from higher to lower in amount in the order of Daya Bay in the South China Sea, Hanzhou Bay in the East China Sea and the Great Wall Bay in Antarctica successively, The results show that the contamination levels of radioactivity, espccially the artificial radioactive contamination in the Antarctic coastal area are far lower than those in China Coastal area, with the remarkable exception of ^(137)Cs.