碳酸钙形成过程中重金属离子的配分问题研究(2)——研究进展和配分机制

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.

Study on Heavy Metals Partitioning in Carbonate Calcium Formation (2)--Research Progress and Partitioning Mechanism

Authors have been summarized the research progress on heavy metals partitioning in carbonate calcium formation. The review is divided two parts. The topic for the part 1 is theoretic background and experimental methods. The topic for the part 2 is research progress and partitioning mechanism. Here is the part 2. In this paper, the advanced experiments related to sorption selectivity of heavy metal ions on calcite surface have been summarized. The results for observation of mono-molecular step distribution on the calcite surface by an atomic force microscope (AFM) were introduced. The theoretic mechanism on heavy metal ions partitioning problem, such as: Two Step Model, Multiple Surface Sites Model, Surface Film Model and Chemisorption Model etc. Has been reviewed. The proposal for future work has been presented.