粉碎型花岗岩的弥散度测定

Determination of Dispersity of Crushed Granite

以99Tc为指示剂,用脉冲源法同时测定了粉碎型花岗岩的弥散度和对99Tc的阻滞因子;以HTO为指示剂,用恒定源法测定了粉碎型花岗岩的弥散度,并与脉冲源法测得的弥散度进行了比较。实验结果表明,脉冲源法与恒定源法测得的粉碎型花岗岩的弥散度基本相同,表明弥散度只是介质本身的特性。

The experimental crushed granite column breakthrough curves,using^(99)Tc as spike tracer and^3H as invariant tracer,are analyzed by different linear regression techniques. Dispersity of crushed granite and retardation factor of^(99)TcO_4^- on the crushed granite are determined simultaneously by one linear regression technique.Dispersity of crushed granite is also obtained with^3H as invariant tracer by the other linear regression technique. The dispersities found by spike source and invariant source methods are compared. The experimental results show that the dispersity found by spike source method is close to that found by invariant source method. It indicates that dispersity is only the characteristic of dispersion medium.