Research Article
Hydrogeochemistry of Fluorine in Groundwater in Humid Mountainous Areas: A Case Study at Xingguo County, Southern China
Table 4
Equilibrium constant (K), solubility product constant (Ksp), and SI of CaF2 in groundwater.
| | Sample no. | F− (mg/L) | Ca2+ (mg/L) | K | KSP (t = 18°C) | KSP (t = 25°C) | SI (t = 18°C) |
| | SJ157 | 0.09 | 2 | 1.122 × 10−15 | 3.40 × 10−11 | 3.95 × 10−11 | −4.482 | | SQ066 | 0.02 | 5 | 1.385 × 10−16 | −5.390 | | SJ148 | 0.62 | 24 | 6.389 × 10−13 | −1.726 | | SJ156 | 0.03 | 54 | 3.366 × 10−15 | −4.004 | | SJ097 | 0.76 | 20 | 8.000 × 10−13 | −1.628 | | SJ138 | 0.2 | 60 | 1.662 × 10−13 | −2.311 | | SJ103 | 1.18 | 89 | 8.582 × 10−12 | −0.598 | | SJ184 | 0.32 | 130 | 9.219 × 10−13 | −1.567 |
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