【摘要】 利用核素示踪技术,研究了⁶⁰Co在盆栽番茄-土壤、模拟水生-陆生生态系统中的迁移、积累和分布,并利用示踪动力学分室模型原理,通过计算机拟合建立了⁶⁰Co在上述系统中行为规律的数学模式,为阐明放射性钴环境行为提供了基础资料。结果表明:（1）⁶⁰Co进入番茄—土壤系统后,迅速在土壤中迁移、积累,并很快被番茄根部吸附、吸收,运送到植株地上部。（2）⁶⁰Co在番茄—土壤系统中的行为规律用开放二分室描述。（3）⁶⁰Co以⁶⁰Co-CoCl₂形式进入水体后,在水生生态系统中发生沉淀或与其他离子进行络合或被水生生物吸收或被吸附等形式在系统中迁移和转化,从而在系统各部分中分配和积累。（4）⁶⁰Co在水生-陆生生态系中的行为规律用开放五分室模型描述。更多还原

【Abstract】 The isotope tracer techniques were applied to study the transportation, accumulation and distribution of 60Co in the pot-cultivated tomato-soil, aquatic and terrestrial ecosystems. Based on the principle of tracer dynamic compartment models, the mathematical formulae were established via computer simulation to describe the 60Co behavior patterns in ecosystems and thus provided some basic information for elucidating the behavior of 60Co in the environment. The results are as follows: (1) When 60Co was introduced into the tomato-soil system, 60Co was transported and accumulated in the soil and adsorbed by tomato root quickly, then transported to the above-ground plant. (2) The behavior patterns of 60Co in the tomato-soil system could be described using the opened two-compartment model. (3) When 60Co was introduced into aquatic system in the form of 60Co-CoCl2, it was transported and transformed via deposit, complexation with other ions, adsorption and absorption by aquatic living things and led to the distribution and accumulation in individual part of the living things. (4) The behavior pattern of 60Co in the aquatic-terrestrial ecosystem could be described by using opened five-compartment model.更多还原