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    铜在水蒸气相中溶解的初步实验

    尚林波 胡瑞忠 樊文苓

    尚林波, 胡瑞忠, 樊文苓, 2006. 铜在水蒸气相中溶解的初步实验. 地球科学, 31(3): 321-325.
    引用本文: 尚林波, 胡瑞忠, 樊文苓, 2006. 铜在水蒸气相中溶解的初步实验. 地球科学, 31(3): 321-325.
    SHANG Lin-bo, HU Rui-zhong, FAN Wen-ling, 2006. A Preliminary Study of the Solubility of Copper in Water Vapor. Earth Science, 31(3): 321-325.
    Citation: SHANG Lin-bo, HU Rui-zhong, FAN Wen-ling, 2006. A Preliminary Study of the Solubility of Copper in Water Vapor. Earth Science, 31(3): 321-325.

    铜在水蒸气相中溶解的初步实验

    基金项目: 

    中国科学院重要方向项目 KZCX-3SW-125

    国家自然科学基金项目 40503007

    国家自然科学基金项目 40373020

    详细信息
      作者简介:

      尚林波(1976-), 女, 助理研究员, 主要从事实验地球化学研究工作. E-mail: sss_2000@sina.com

    • 中图分类号: P599

    A Preliminary Study of the Solubility of Copper in Water Vapor

    • 摘要: 近年来地质证据和少量的实验研究证实, 相当量的铜可以在气相中迁移, 人们认识到铜在气相中迁移是一种重要的地球化学过程, 但目前关于铜在气相中溶解反应机理的研究还相当缺乏.本文通过溶解度法, 在310~350℃, 压力为4.2~10MPa的条件范围内, 实验研究了铜在不饱和水蒸气相中的溶解度.结果表明: 水蒸气的存在大大增强了铜在气相中的溶解度; 恒定温度下, 铜在气相中的溶解度随着水蒸气压的增加而增大; 气相中铜可能以水合物的形式存在, 铜在气相中的溶解可由以下反应表述: CuClmsolid+nH2O gas=CuClm·(H2O)ngas(m=1, 2), 其中水合数随着温度升高而下降, 温度为310℃水合数n为~6, 330℃为~5, 350℃为~4.研究结果明确显示, 气体溶剂H2O与铜之间的反应可大大增强铜在气相中的溶解和迁移能力.

       

    • 图  1  实验中所用的钛高压釜

      Fig.  1.  A titanium autoclave of the type used in this study

      图  2  温度为310℃、压力为4.84 MPa条件下, 铜在气相中的溶解度与时间的关系

      Fig.  2.  Solubility of copper in the vapor phase as a function of time, at 310℃, pH2O =4.84 MPa

      图  3  在310℃、330℃、350℃条件下log XCu对log fH2O的关系

      Fig.  3.  Plots of log XCu versus log fH2O at 310℃, 330℃, 350℃

      表  1  铜在气相中的溶解度和摩尔分数

      Table  1.   Solubility and mole fraction of copper in the vapor phase

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    • 刊出日期:  2006-05-25

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