| 玄武岩—水相互作用的溶解机理研究 |
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| 引用本文： | 党志,侯瑛.玄武岩—水相互作用的溶解机理研究[J].岩石学报,1995,11(1):9-15. |
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| 作者姓名： | 党志 侯瑛 |
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| 作者单位： | 中国科学院地球化学研究所环境地球化学国家重点实验室 |
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| 摘 要： | 在常温常压排除大气干扰的封闭体系条件下,将一定粒度的玄武岩样品浸泡在不同酸度的水溶液里,研究玄武岩－水相互作用过程中元素释放和溶液酸度的变化情况。结果发现：（１）经过一段时间后,溶液中主要元素的浓度趋向平衡;（２）溶液酸度发生明显变化,即不论反应初始溶液是碱性的还是酸性的,最终都将趋于中性,我们把此现象称为溶液的中性化效应。根据溶液中溶解组分的浓度和样品表面组成的ＸＰＳ测定结果,提出玄武岩在碱性和酸性溶液中不同的溶解机理。
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| 关 键 词： | 玄武岩 水 水－岩作用 溶解机理 |
Experimental Study on the Dissolution Kinetics of Basalt-Water Interaction |
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| Dang Zhi and Hou Ying.Experimental Study on the Dissolution Kinetics of Basalt-Water Interaction[J].Acta Petrologica Sinica,1995,11(1):9-15. |
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| Authors: | Dang Zhi and Hou Ying |
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| Abstract: | The results of water-rock interaction experiment by immersing basalt specimen of certain particle size into water with diverse acidity under room T-P sealed conditions with is atmospheric disturbance show that after a certain time the concerntration of major elements in solution turns into equilibrium, and the acidity of the solution tends to become neutral regardless of whether the original solution is acid or basic during basalt-water interaction. We call this phenomenon "pH neutralized effect". The dissolved species in the solution were determined and the chemical components of unreacted and reacted sample-surface were analyzed using X-ray photoelectron spectroscopy (XPS). The results revealed two different mechamisms of dissolution of basalt in acidic and basic solutions. |
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| Keywords: | Basalt Water Water-rock interaction Dissolution kinetics |
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