云南红土铁离子迁移的试验研究

通过人工制备含铁红土样，分别考虑击实功、含水率和温度的影响，采用浸泡方法，测试分析了不同浸泡时间水溶液中铁离子的浓度变化。试验结果表明，水溶液中铁离子的浓度大小反映了红土中铁离子的迁移过程，击实功的影响最小，温度的影响最显著，含水率的影响居中。不同影响因素下，水溶液中铁离子的总浓度随浸泡时间的延长、击实功的减小、含水率的提高和温度的升高呈线性增大；其浓度变化随击实功的减小、含水率的提高和温度的升高呈线性减小。其结果可以为深入研究水环境条件下红土中铁离子的迁移特性和迁移机理以及红土地区地质灾害的发生发展机制提供科学依据。

The test study of the iron ions migration in Yunnan laterite

This paper measued and analyzed the concentration change of iron ions in water solution in different the compaction energy,the water content,the temperature and the immersion time,by the immersion test artificial preparation of iron laterite sample.The results of test shown that,the concentration change of iron ions in water solution reflected the migration process of iron ions in laterite,the effect of the cpmpaction energy was the least,the effect of the temperature was the most significant,the effect of the water content was between them.Total concentration of iron ions in water solution increases linearly with reducing the compaction energy,raising the water content and the temperature,extension of the immersion time,but its concentration change reduces linearly.The results can provide a scientific basis in order to study deeply the migration characteristics and the migration mechanisms of iron ions in laterite in water environment and reveal the mechanisms of occurrence and developments of geological disasters in laterite area.