摘要
研究了１４１Ｃｅ在模拟水稻田中的迁移、积累和分布。结果表明，１４１Ｃｅ进入田水后向土壤和水稻迁移，水中１４１Ｃｅ浓度迅速下降。水稻中１４１Ｃｅ浓度显著地高于土壤和田水。田水和土壤中的１４１Ｃｅ浓度随时间延长基本上单调降低，而水稻中１４１Ｃｅ浓度则在经历某一最大值后便下降。土壤对１４１Ｃｅ的吸附迅速，吸附率较高，９５％以上的１４１Ｃｅ滞留于表层４ｃｍ之内；土壤中１４１Ｃｅ浓度与离表面深度呈单项指数负相关。
The transport,accumulation and distribution of 141 Ce in a simulated paddy were studied.The results show that when entering water, 141 Ce will be transferred to soil and rice,and the 141 Ce concentration in water will decrease rapidly.The 141 Ce concentration in rice is higher than that in soil and water.The dynamic change of the 141 Ce concentration in the water and soil are decreased monotonously with time,and that in rice is increased to a maximum value then decreased, 141 Ce is puickly adsorbed by soil and the adsorption rate is higher.More than 95% of 141 Ce is detainde in 4 cm of soil surface.The 141 Ce concentration in soil presents an individual exponential declining with depth of soil.
出处
《核技术》
CAS
CSCD
北大核心
1997年第1期56-60,共5页
Nuclear Techniques
基金
浙江省自然科学基金
关键词
水稻
放射性铈
隔室模型
浓集系数
Rice,Radioactive cerium,Compartment model,Concectration factor
