【摘 要】
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In this study the zinc exchange process and the reason for the non-additive exchange of δ-MnO2/montmorrillonite have been investigated. The results suggest th
【出 处】
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Acta Oceanologica Sinica
论文部分内容阅读
In this study the zinc exchange process and the reason for the non-additive exchange of δ-MnO2/montmorrillonite have been investigated. The results suggest that with pH increasing from 2 to 8, the stepwise exchange of zinc occurs on δ-MnO. and montmorrillonite in their mixture.At low pH zinc ions are bound on δ-MnO2, while at high pH, the exchange on montmorrillonite dominates the surface interaction in the mixture. The study demonstrates that the stepwise exchange and the heterogeneity of the binding sites on δ-MnO2 surface are the reason for the non-additive exchange. It is also shown that when δ-MnO2 amounts to 5 %, zinc exchange on sea sediments is controlled by 8-MnO2.
The results suggest that with pH increasing from 2 to 8, the stepwise exchange of zinc occurs on δ-MnO. And At the high pH, the exchange on montmorrillonite dominates the surface interaction in the mixture. At the study demonstrates that the stepwise exchange and the heterogeneity of the binding sites on δ -MnO2 surface are the reason for the non-additive exchange. It is also shown that when δ-MnO2 amounts to 5%, zinc exchange on sea sediments is controlled by 8-MnO2.
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