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在进行氚在黏土矿物中的滞留试验基础上,对试验结果进行了总结,分析了滞留现象对相关水文地质、环境地质参数试验的影响。结果表明:氚在蒙脱石、高岭石、伊利石等孔隙介质中的平均分配系数分别为0.15 ml/g、0.10 ml/g、0.12ml/g;氚的绝对吸附量随氚水比活度的增加而增大,绝对吸附量的对数与相应氚水比活度的对数呈直线相关关系;氚的滞留将使野外弥散试验获得的弥散度和弥散系数减小,使得室内示踪试验获得的孔隙水流速比实际孔隙水流速减小5%~25%,使得按照3H测龄方法获得的亚砂土等含水层中地下水年龄增大5%~20%,按照3H-3He测龄方法获得的地下水年龄比实际情况增大4%~18%。
Based on the experiments of tritium retention in clay minerals, the experimental results were summarized and the influence of retention on the hydrogeology and environmental geology parameters was analyzed. The results showed that the average partition coefficients of tritium in porous media such as montmorillonite, kaolinite and illite were 0.15 ml / g, 0.10 ml / g and 0.12 ml / g, respectively. The absolute adsorption capacity of tritium Degree increases, the logarithm of the absolute adsorption amount has a linear correlation with the logarithm of the corresponding specific activity of tritiated water. The retention of tritium will make the dispersion and the dispersion coefficient obtained in the field dispersion test decrease, making indoor tracing The measured pore water flow rate is 5% -25% lower than the actual pore water flow rate, so that the age of groundwater in sub-sand and other aquifers obtained by the 3H age-measuring method increases by 5% -20% according to the 3H-3He age test The age of groundwater obtained by the method is 4% ~ 18% larger than the actual situation.