【摘要】 采用模拟土柱法及同位素示踪技术研究了⁶⁰Co在2种淹水土壤（小粉土、黄红壤）中的淋溶和垂直迁移.结果表明,淋溶后收集到的全部淋溶水中⁶⁰Co的含量较少,小粉土及黄红壤淋溶水中⁶⁰Co分别为总活度的5.61%和5.25%;滞留于土壤中的⁶⁰Co绝大部分分布在土壤表层0～1.0cm范围内,小粉土及黄红壤中分别有69.74%～78.63%和75.77%～86.84%的⁶⁰Co滞留于0～1.0cm土层范围内;土壤中⁶⁰Co比活度与距土壤表层深度分布呈单项指数规律.更多还原

【Abstract】 Leaching characteristics and vertical transference of radioactive nuclide cobalt-60 in two representational soils (paddy soil,yellow-red soil) were studied by using isotope-tracer techniques for soil columns simulation installation.The results showed that the specific activity of cobalt-60 in collected leaching water was low after passing through soil column. The amount of cobalt-60 in leaching water of paddy soil and yellow-red earth was 5.61%,and 5.25%.In paddy soil and yellow-red earth,69.74%～78.63%and 75.77%～86.84%radioactivity of cobalt-60 was concentrated in the 0～1.0 cm upper layer soils respectively,which illustrated that most of cobalt-60 remained in the surface soils.The specific activity of cobalt-60 in soil present was an individual exponential declining with depth of soil.更多还原