Department of Management and Environment, University of Jendouba, High Institute of Rural Engineering and Equipment Medjez El Bab, Laboratory of chemistry and water quality, Medjez El Bab, Beja, Tunisia
The aim of our study is to apply of simple, effective and less expensive methods of treatment of the iron of natural water. For these reasons, we chose oxidation by simple agitation and adsorption on a natural material, coal of the wood of pine. The tests showed that agitation does not have any effect on elimination of iron in an acid medium The oxidation of iron by simple agitation is supported by a basic Ph, with pH = 8 the concentration of residual iron in water reached 0,62 mg/l at 15 min of agitation, iron is completely to eliminate with pH = 10. The tests of adsorption showed that balance is reached at 10 min; the adsorption of iron on coal of pine is a fast phenomenon. The study of factor which influence the kinetics of adsorption by coal of pine reveal that the output of adsorption increase with the increase in ph (97% with pH= 9). The variation stirring velocity shows that the good output is obtained at a speed of 100 turns/ min. The isotherm of adsorption obeys the model of Freundlich.
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