乌梁素海重金属在冰-水介质中迁移的微观机理.

In order to explore the microscopic mechanism of heavy metals migration in ice water medium of Lake Ulansuhai, indoor unidirectional icing simulation was carried out on water samples of different heavy metals (Fe、As、Cr、Cu、Zn、Mn、Cd、Hg、Pb) in Lake Ulansuhai during the icebound period, and the distribution characteristics of substances in the ice layer and sub ice water layer were summarized. The calculation was carried out according to the first principle, and its microscopic mechanism was analyzed from the perspective of binding energy. The binding energy of heavy metals with water is greater than the binding energy of heavy metals with ice. A large binding energy means that heavy metals are more stable in water. That is to say heavy metals are more stable in water than in ice, driving them to migrate from ice layer to sub ice water layer. [ABSTRACT FROM AUTHOR]