【摘要】 应用两种重要的放射性核素¹³⁴Cs和⁶⁵Zn研究了翡翠贻贝（Perna Viridis）器官组织对放射性核素的吸收积累和排泄规律。实验结果表明:翡翠贻贝对¹³⁴Cs的吸收率很低,其足丝对¹³⁴Cs的浓集系数接近1,低于其软体组织,排泄速度则比软体组织快。贻贝的足丝对⁶⁵Zn具有很高的浓集能力,浓集系数高达900,远高于其软体组织;而排泄速度则比软体组织慢。贻贝的软体组织对⁶⁵Zn的吸收也明显高于对¹³⁴Cs的吸收率,当环境海水中⁶⁵Zn比活度很低时,贻贝的足丝也能高度浓集低放水平的⁶⁵Zn。示踪实验结果说明,翡翠贻贝对¹³⁴Cs和⁶⁵Zn是有选择性吸收的。更多还原

【Abstract】 Two important radionuclides 134Cs and 65Zn were applied to study the accumulation, distribution and excretion of radioactive nuclides in organs and tissues of green mussel Perna viridis. The results showed that the uptake rate of 134Cs by green mussels was very low and the concentration factor (CF) for 134Cs in the byssus approximated to 1. This CF value was lower than that of other tissues and organs of mussels, but its excretion rate was much higher than that of soft tissues. It was also found that the byssus of mussels had a special ability to accumulate 65Zn. Concentration factor (CF) for 65Zn in the byssus could reach as high as 900, which was much higher than that of any other tissues. However, its excretion rate was lower than that of other tissues and organs. The uptake rate of 65Zn by soft tissues was markedly higher than that of 134Cs. The mussels could also highly concentrate the low level 65Zn even if specific activity of 65Zn was very low in the environmental seawater. Results of radioactive trace experiments showed that the absorption of 134Cs and 65Zn by Perna viridis was selective.更多还原