摘要
本文报道了￣（８５）Ｓｒ、￣（１３４）Ｃｓ和￣（６０）Ｃｏ在采自本院野外试验场，从地表到地下２ｍ深黄土与地下水间分配系数的测定结果，以及核素浓度、ｐＨ和温度对分配系数的影响。黄土采集的深度范围分别为：地表－０．５ｍ，０．５－１ｍ，１－１．５ｍ，１．５－２ｍ，共采集１６个样品；地下水取自试验场的井水。实验采用静态法。实验结果表明，１６个样品测定的￣（８５）Ｓｒ、￣（１３４）Ｃｓ和￣（６０）Ｃｏ的分配系数的均值分别为８２、７．４×１０￣３和５．４×１０￣３ｍＬ／ｇ；在不同深度的黄土中测得的分配系数基本一致。ｐＨ值的变化对￣（１３４）Ｃｓ和￣（８５）Ｓｒ的分配系数有较大影响，对￣（６０）Ｃｏ则影响不大。
Measurement results of distribution coefficients were reported for the radionu-clides ￣(85)Sr、￣(134)Cs and￣(60)Co between the loess and underground water taken from CIRP' s fieldtest site. In addition,the affection of carrier concentration of each radionuclide ,pH value andtemperature to the distribution coefficient was also declared. Sixteen loess samples were coLlected in the following depthes:surface-0.5m,0.5-1.0m,1.0-1.5 m and l.5-2.0m.The well water in the field test site was taken as underground water. Batch method was usedin the experiment. For each kind of radionuclides the distribution coefficients were almost thesame for loess samples taken from different depthes. Average K_d value of sixteen samples for￣(85)Sr、￣(134)Cs and ￣(60)Co was 82,7.4×10￣3 and 5.4 ×10￣3mL/g,respectively. Distribution coeffi-cients were greatly affected by pH value for these three radionuclides.
出处
《辐射防护》
CAS
CSCD
北大核心
1995年第2期138-142,共5页
Radiation Protection
