摘要
^(134)Cs在水-鱼-底泥系统中以指数回归形式消长,鱼通过消化系统能迅速地吸收水体中的^(134)Cs,在放养12h内,鱼体对Cs的吸收较快。^(134)Cs在鱼体中的分布,以鱼肉中最多,占鱼体总放射性的29.5％;土壤能吸附水体中的^(134)Cs,其吸附量随加入之土壤量的增加而增加,从而明显地降低水体中^(134)Cs的放射性,并大大减少鱼体对^(134)Cs的吸收。水体中添加钾离子,能减少鱼体对^(134)Cs的吸收。
Variation of Cs-134 in water-fish-soil ecosystem is in form of exponential function. Fish rapidly absorbs Cs-134 from water phase through the digestive system. The amount of Cs-134 distributed in fish flesh is the largest which accounts for 29.5 % of the total amount of radioactivity of Cs-134 absorbed. Soil can adsorb Cs-134 from water phase. The adsorptive amount of Cs-134 increases with the amount'of Soil. Therefore, soil can obviously decrease the radioactivity of Cs-134 in water phase, and diminish the absorption of Cs-134 by fish. Adding potassium ion to water phase can also decrease the absorption of Cs-134 by fish.
关键词
^134CS
水相生态系
消长
分配
行为
cesium-134
aqueous ecosystem
behaviour
variation
allocation
