| Modeling geochemical factors controlling fluoride concentration in groundwater |
| Wei Zhang; Li Zhou; Hongfeng Tang
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| 2015
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发表期刊 | Arabian Journal of Geosciences
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卷号 | 8期号:11页码:9133-9147 |
摘要 | The fluoride in groundwater can affect human health. The concentration of fluoride ions in groundwater is influenced by geogenic processes and is limited by the solubility of fluoride-containing minerals, especially fluorite. In this work, we summarize and assess fluorite solubility and the Pitzer interaction model parameters of related species, by which a quantitative model for calculation of the phases and chemical speciation in the Na-Ca-H-F-Cl-SO4-OH-HCO3-CO3-CO2-H2O aqueous system for temperatures 0-100 A degrees C, and a pressure of 1 bar was established. Based on this model, we evaluate factors that govern the levels of fluoride, e.g. temperature, solution composition, pH, CO2 partial pressure, and concentration of carbonate minerals in the aquifer. The fluorite solubility increases with temperature and varies in different aqueous solutions. The fluoride concentration is highest in NaHCO3 type aqueous solutions. In acidic solution, HF is the dominant species, and free fluoride becomes dominant with increasing pH. Dissolved CO2 in solution slightly increases the concentration of fluoride in non-bicarbonate aqueous solution and non-calcite-bearing aquifer systems. In contrast, it has a significant negative effect in calcite and bicarbonate-bearing aquifer systems, where it greatly decreases the fluoride concentration. In calcite-bearing aquifer systems, the fluoride concentration is lower than in non-calcite mineral aquifer systems. |
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学科领域 | 地球深部物质与流体作用地球化学
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收录类别 | SCI
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语种 | 英语
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文献类型 | 期刊论文
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条目标识符 | http://ir.gyig.ac.cn/handle/352002/5770
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专题 | 地球内部物质高温高压实验室_地球内部物质高温高压实验室_期刊论文 地球深部物质与流体作用地球化学研究室
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推荐引用方式 GB/T 7714 |
Wei Zhang,Li Zhou,Hongfeng Tang. Modeling geochemical factors controlling fluoride concentration in groundwater[J]. Arabian Journal of Geosciences,2015,8(11):9133-9147.
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APA |
Wei Zhang,Li Zhou,&Hongfeng Tang.(2015).Modeling geochemical factors controlling fluoride concentration in groundwater.Arabian Journal of Geosciences,8(11),9133-9147.
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MLA |
Wei Zhang,et al."Modeling geochemical factors controlling fluoride concentration in groundwater".Arabian Journal of Geosciences 8.11(2015):9133-9147.
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文件名:
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Modeling geochemical factors controlling fluoride concentration in groundwater.pdf
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格式:
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Adobe PDF
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