温度对水中碳酸平衡的影响浅析

基金项目: 广西自然科学基金项目(桂科自0991249)

Temperature effect on carbonic acid balance in water

1.
College of Environmental Science and Engineering, Guilin University of Technology；The Guangxi Key Laboratory of Environmental Engineering, Protection and Assessment
2.
College of Environmental Science and Engineering, Guilin University of Technology

摘要: 本文通过理论分析和计算探讨了0～100℃范围内不同温度下的碳酸平衡问题,分析了H2CO3*、HCO3-和CO32-三种碳酸在不同温度和pH条件下的水中所占比例及分布规律。认为0～100℃范围内pH0在8.60～8.22之间变化,变化范围较小;三种碳酸在不同温度下随pH变化过程中所占比例存在差异,但差异也不大;在0～100℃范围内不管温度高低,均表现出酸性水中H2CO3*占优势,碱性水中CO32-占优势,偏酸、偏碱及中性水中HCO3-占优势;在较低pH下由于水中CO32-含量很少,因此用常规方法一般是难以检测到的。
- 温度 /
- 碳酸平衡 /
- 岩溶
Abstract: Carbonic acid balance at 0～100℃ is studied based on theoretical analysis and calculation. Proportion and distribution of H2CO3*，HCO3－ and CO32－ in water at different temperature and pH value are elucidated. It is believed that the pH0 ranges slight, between 8.60～8.22 within 0～100℃, and that the proportion of three carbonates accounting for different ratios with the changes of the pH, but the difference is small. At any temperature between 0℃ and 100℃, H2CO3* dominates in acidic water, while CO32－ in alkaline water and HCO3－ in low acidic, low alkaline and neutral water. It is difficult for CO32－ determination with traditional method for its low concentration under low pH value.
- temperature /
- carbonic acid balance /
- karst

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