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目的 137 Cs是核电厂辐射环境影响评价中的关键核素之一,了解不同土～水条件下137Cs的吸附分配特性.方法 通过现场采集的某拟建核电厂周边区域不同类型土壤,采用静态批式法进行137Cs吸附特性的实验研究.结果 获得了137Cs在3种土壤和3种水条件下的吸附分配系数,为137Cs的环境迁移模式计算提供了实例参数.结论 酸性土壤对137Cs的吸附能力较偏中性土壤的吸附能力弱,不同的水试验条件对137Cs在土壤中的吸附影响较小.“,”Objective 137 Cs is the one of the key nuclides in the environmental impact assessment of nuclear power plants.To understand the characteristics of adsorption and distribution of 137 Cs under different soil-water conditions,provide a basis for the evaluation.Methods the soil from the area of a certain nuclear power plant has been used to carry out experimental study about the adsorption property of 137 Cs by using Batch method.Results As the result of this study,we obtain the adsorp tion distribution coefficient Kd of 137 Cs in three kinds of soil,which provide instance parameter for migration patterns of 137 Cs.Conclusion The adsorption ability of the acidic soil to 137 Cs is weaker than that of the partial neutral soil.The type of water has little impact on adsorption distribution coefficient.