融冰过程中铁离子和锰离子的迁移规律

为探究融冰过程中重金属离子的迁移规律，选择铁离子和锰离子为研究对象，开展了室内模拟融冰实验，探讨其在融冰过程中的迁移规律，并分析初始浓度和冷冻温度对其迁移过程的影响.结果表明：在不同的初始浓度和冷冻温度条件下，铁离子和锰离子在冰中各层的浓度分布关系皆为：中层 < 上层 < 下层；融冰过程中，51.17%~71.67%的铁离子和锰离子均在冰体融化前期（0~25%）集中释放，中后期相对平稳均匀释放，此外初始浓度对冰融化时铁离子和锰离子的迁移规律影响不大，而冷冻温度较低时，融1中铁离子和锰离子的浓度基本在增加；融冰过程中，随着累积融水体积的增加，融水中铁离子和锰离子的浓度与冰体初始浓度之比逐渐降低，它们之间呈指数函数衰减模式.

Migration of iron and manganese ions during ice melting

In order to explore the migration law of heavy metal ions in the process of ice melting, indoor simulated ice melting experiments were carried out to study the migration law with iron and manganese ions as example metal ions, and the effects of initial concentration and freezing temperature on the migration process were also analyzed. The results showed that under different initial concentrations and freezing temperatures, the concentration distribution of iron and manganese ions in ice was as follows:middle layer < upper layer < lower layer; In the process of ice melting, 51.17%~71.67% of iron and manganese ions were released in the early stage of ice melting (0~25%), and in the middle and late stages, iron and manganese ions were released stably and evenly. In addition, the initial concentration had little effect on the migration of iron and manganese ions during ice melting. When the freezing temperature was low, the concentration of iron and manganese ions increased basically in melt 1. In the process of ice melting, with the increase of accumulated melt water volume, the ratio of the concentration of iron ion and manganese ion in melt water to initial concentration of ice body gradually decreased, and showed an exponential function attenuation mode.