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本文为“碳酸钙形成过程中重金属离子的配分问题研究”的第二部分。上文介绍了配分问题的理论基础、实验方法和重金属离子的配分特征。本文则介绍配分问题的理论机制。作者综述了有关重金属离子在方解石晶面上选择吸附的最新实验 ;介绍了用原子力显微镜观察晶面上单分子台阶分布的研究结果 ;评述了研究重金属离子配分问题的理论机制 ;讨论了两阶段理论模型 ,多重表面座模型 ,表面薄膜模型和化学吸附层模型的应用 ;提出了深入开展杂质分凝理论研究的建议。
This article is the second part of “Study on Partitioning of Heavy Metal Ions in Calcium Carbonate Formation”. The above introduces the theoretical basis of the partitioning problem, experimental methods and the partition characteristics of heavy metal ions. This article introduces the rationale for the problem of partitioning. In this paper, the authors reviewed the recent experiments on the selective adsorption of heavy metal ions on the calcite crystal plane. The results of the investigation of the single-molecule step distribution on the crystal plane by atomic force microscopy were reviewed. The theoretical mechanism of the study on the partitioning of heavy metal ions was reviewed. Model, multi-surface seat model, surface film model and chemisorption layer model; and put forward suggestions for further research on impurity segregation theory.