海洋环境放射性污染调查通常包括海水、海洋生物及海洋沉积物的放射性测定。人工放射性同位素进入海洋后有的被悬浮颗粒吸附,随着悬浮颗粒的下沉而沉积,有的由于重力的作用而直接沉于海底,或者被海流输送扩散。海洋沉积物对大多数人工放射性同位素都有较强的吸附能力,其中人工放射性同位素的含量一般高于海水和海洋生物体。因此,海洋沉积物中放射性同位素的调查是海洋环境放射性污染调查不可缺少的重要组成部分,我国的《海 The survey of radioactive contamination of the marine environment usually includes radioactive determination of seawater, marine life and marine sediments. After the artificial radioisotope enters the ocean, it is adsorbed by the suspended particles, precipitates as the suspended particles sink, and some sink directly to the sea floor due to gravity or are transported and diffused by ocean currents. Marine sediments have a strong adsorption capacity for most artificial radioisotopes, of which artificial radioisotopes are generally higher than seawater and marine organisms. Therefore, the survey of radioactive isotopes in marine sediments is an indispensable part of the survey of radioactive pollution in the marine environment. Our country’s "sea