| 天然水CaCO_3侵蚀量与沉淀量的计算 |
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| 引用本文： | 钱会,胡建刚.天然水CaCO_3侵蚀量与沉淀量的计算[J].地球科学与环境学报,1996(4). |
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| 作者姓名： | 钱会 胡建刚 |
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| 作者单位： | 西安地质学院水工系，陕西省地矿局地质环境监测总站 |
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| 摘 要： | 天然水ＣａＣＯ３侵蚀量与沉淀量的计算是岩溶地球化学研究中的一个重要问题，本文在指出有关文献对这一问题的处理存在严重问题的同时，提出了天然水ＣａＣＯ３侵蚀量与沉淀量计算的新方法。该方法以水溶液相对ＣＳＣＯ３饱和度的计算为基础，对ＣａＣＯ３溶解或沉淀所引起的水溶液ｐＨ值、组分的活度系数以及水溶液中各组分存在形式含量的变化统一地作了考虑，且区分开放系统与封闭系统两种不同的情况分别进行了计算。实际水样的计算结果表明，计算中若不考虑上述的种种变化，则计算结果的误差将是相当大的。
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| 关 键 词： | 天然水 CaCO_3侵蚀量（沉淀量） 计算方法 饱和度 |
CALCULATION OF SOLUBILITY (PRECIPITABILITY)IN NATURAL WATER |
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| Qian Hui.CALCULATION OF SOLUBILITY (PRECIPITABILITY)IN NATURAL WATER[J].Journal of Earth Sciences and Environment,1996(4). |
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| Authors: | Qian Hui |
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| Abstract: | Natuural water is usually in inequilibrium with CaCO3. Water unsaturated by CaCO3 will dissolve CaCO3. while CaCO3 in oversaturated water will be precipitated. The problem that how much CaCO3 can be dissolved or precipitated by a liter of water is an important problem in karst geochemistry' The essence of this?roblem is to calculate the solubillity (precipitability) of CaCO3 in natural water. In this paper, the seriousproblems existed in the present calculation method were pointed out, and a new method to calculate CaCO3solubility (precipitability) in natural water were developed. The basis of this method is equilibrium ditributioncalculation of species in water. The changes of species activity coefficients and water PH value with dissolutionor precipitation of CaCO, were also considered in the method' According to the calculated results of several actual water samples, if the above changes were not considered in the calculation, the error of the calculated results would be very large. |
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| Keywords: | natural water solubility (precipitability) of CaCO3 calculaation method saturation index |
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