Abstract
The goal of this topic is a synthesis of the main characteristics of iron in groundwater and the oxidation process used to remove it. Indeed, the kinetics of chemical oxidation of iron (II) was examined with reconstituted water (distilled water + iron sulphate) and proceeded to the application in the groundwater samples taken from South Pout (Senegal) precisely in the drilling PS2. The sources of iron are natural or anthropogenic. In Senegalese waters, its content is variable and sometimes exceeds the standards of potability. Despite the diversification of iron removal process, chemical oxidation is the most used solution in drinking water treatment plants in Senegalese rural areas. Applied oxidation processes such as aeration and chlorination, however, are insufficient to produce drinking water with an iron concentration in accordance with standards of potability.
Highlights
In abundance, iron is the fourth element in the Earth’s crust and the first among heavy metals [1]
These results confirm the kinetics of iron oxidation by sodium hypochlorite (NaClO)
Two of which were marketed for their potential iron (II) removal, were tested in this topic: oxygen (O2), potassium permanganate (KMnO4), sodium hypochlorite (NaClO)
Summary
Iron is the fourth element in the Earth’s crust and the first among heavy metals [1]. It is found mainly in the form of Fe(II) or Fe(III). As in some groundwater, some lakes or reservoirs, and in the absence of sulphide and carbonate, soluble Fe(II) can be found in high concentration [2]. In Senegal, the concentration of iron in groundwater is generally less than 10 mg·L−1. Data obtained from Senegalese Water Company (SWC) between 2000 and 2014 indicate that the concentration varies between less than 0.02 mg·L−1 and 5.76 mg·L−1 in central, southern and eastern areas of Senegal [5]
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