Vol. 1, Issue 2 (2013)
Defluoridation of Water by Precipitation with Calcium Sulfate and Calcium Chloride
![The witness graph for fluoride](https://www.chemijournal.com/up/graphics/12/3.1.png)
Fig. 1: The witness graph for fluoride
![variation of residual fluoride against added calcium concentration](https://www.chemijournal.com/up/graphics/12/3.2.jpg)
Fig. 2: variation of residual fluoride against added calcium concentration
![variation of residual fluoride against pH](https://www.chemijournal.com/up/graphics/12/3.3.jpg)
Fig. 3: variation of residual fluoride against pH
![variation of residual fluoride against temperature](https://www.chemijournal.com/up/graphics/12/3.4.jpg)
Fig. 4: variation of residual fluoride against temperature