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利用放射性同位素研究土壤中离子的扩散,早有文献报道,这在测定方法上是一个很大的改进。近年来,利用放射性同位素~(131)I 和~(35)S 模拟土体和地下水盐分运行的一些规律,揭示了表土积盐的过程;利用放射性同位素 ~(22)Na 研究原状土柱盐化和脱盐化过程中钠的上下运动规律;利用放射性同位素示踪方法研究土壤中盐分移动和表土积盐规律,这些无疑是很方便很有效的手段。本文仅就核素在实验土柱中扩散问题加以讨论。
The use of radioactive isotopes to study the diffusion of ions in soil has long been reported in the literature, which is a great improvement in the determination method. In recent years, the use of radioactive isotope ~ (131) I and ~ (35) S simulated soil and groundwater salinity operation of some of the laws revealed the topsoil salt process; the use of radioactive isotopes ~ (22) Na study of undisturbed soil column salinization And desalination process of sodium up and down movement law; the use of radioactive isotope tracer method of soil salt movement and topsoil salt, these are undoubtedly very convenient and effective means. This article only discusses the issue of the diffusion of nuclides in experimental soil columns.