地电化学离子晕的形成过程中外加电场的作用

THE ROLE OF THE ARTIFICIAL ELECTRIC FIELD IN THE FORMATION OF GEOELECTROCHEMICAL IONIC HALOS

在地电提取实验研究过程中,通过对外加电压、提取液实验研究对比,泡塑电极在有无外加电压的条件下进行的实验对比,对土壤样品中不同赋存形式的金属元素进行通电对比实验研究,结果表明在地电提取成晕过程中,外加电场一方面激活了土壤溶液中离子的赋存状态,使之成为电活动态,将不可溶相态转化为可溶相态;另一方面,外加电场可加速离子的迁移速度和阴阳离子的两极分化,使阴离子向阳极迁移,阳离子向阴极迁移。外加电压不可能在通电时将深部矿体或来自深部的离子直接提取到提取电极上。

Test data indicate that the artificial electric field can activate and change the binding modes of occurrence of elements in the soil. On the one hand, It can bring about decomposition of a great number of complex anions and other stable or sub - stable forms of elements, and on the other hand, it can make anions and cations move to the extraction electrode, and can accelerate ionic movement, as can be seen from the comparison of the artificial electric field and the extracted liquid in the element - collectors （ ECs）, no matter whether the artificial electric field is close to the ECs or not and how different the modes of occurrence of elements in the samples from the soil are. In fact, it is quite impossible for the artificial electric field to extract directly the metal ions from the ore body at depth.