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石英表面配合物与溶解动力学模型
引用本文:张生.石英表面配合物与溶解动力学模型[J].地球与环境,1997(4).
作者姓名:张生
作者单位:中国科学院广州地球化学研究所!广州,510640
摘    要:阐述了石英表面配合物和溶解动力学机理之间的关系,指出了石英的反应性主要受负电性表面物种的控制,从而导致电解质、离子强度、pH等因素对石英溶解的催化效应.溶解达率的提高与反应活化能的降低成活化熵的增大有关。最后,介绍了在过渡态理论和表面反应模型基础上建立的石英溶解速率方程。

关 键 词:表面配合物  速率常数  活化能  速率方程(定律)

QUARTZ-SURFACE COMPLEXES AND KINETIC MODELS OF DISSOLUTION
Zhang Sheng.QUARTZ-SURFACE COMPLEXES AND KINETIC MODELS OF DISSOLUTION[J].Earth and Environment,1997(4).
Authors:Zhang Sheng
Abstract:This paper illustrates the relationship between quartz-surface complexes and kinetic mechanism of dissolution, pointing out that the reactivity of quartz is mainly controlled by negative-charged surface species, which leads to the catalysis effect of electrolyte, ionic strength, pH, etc. on quartz dissolution. The acceleration of dissolution rate is related to the decrease of reaction activation energy or the increase of activation entropy. The dissolution rate equations of quartz based on the transition state theory and surface reaction models are also introduced in the paper.
Keywords:surface complex  rate constant  activation energy  rate equation  
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