Research Article
Fluoride and Arsenite Removal by Adsorption on La2O3-CeO2/Laterite
Table 4
Piecewise regression analysis for the three-linear-segment model for LCL.
| | First linear segment | Second linear segment | Third linear segment | | Arsenite (mg·L–1) | Intercept 1 | Slope 1 | Intercept 2 | Slope 2 | Intercept 3 | Slope 2 | | 5 | -1.058 (-7.43; 5.332) | 2.32 | 2.73 (2.14; 3.32) | 0.60 | 6.30 (5.78; 6.82) | 0.12 | | 10 | 1.41 (0.39; 2.43) | 1.998 | 11.70 (11.12; 12.27) | 0.13 | 12.63 (12.57; 12.68) | 0.014 |
| | Fluorite (mg·L–1) | Intercept 1 | Slope 1 | Intercept 2 | Slope 2 | Intercept 3 | Slope 2 | | 5 | 0.31 (-1.96; 2.57) | 1.22 | 2.64 (2.17; 3.12) | 0.35 | 5.51 (5.47; 5.55) | 0.012 | | 10 | 0.77 (-1.12; 2.66) | 1.98 | 5.48 (4.96; 5.99) | 0.52 | 9.65 (9.45; 99.85) | 0.047 |
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The values in parentheses describe a 95% confidence interval.
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