Abstract

Yahouza Zaneidou, Manzola Abdou Salam^*, Amadou Haoua and Laouali Mahaman Sani

DOI : http://dx.doi.org/10.13005/ojc/360108

The paper is a comparative study on deferrization efficiency of two methods on the waters of rural drilling of Dan Daji (Niger) which have high iron concentration (1.69 mg/L): the deferrization by oxidation-precipitation method and the deferrization made by a modern unit of deferrization. Before comparison, a synthetic solution was prepared by adding a certain amount of FeSO4.7H2O in bicarbonate aqueous solutions and studied. The natural water was characterized by physico-chemical analyzes. The two methods are appropriate for the deferrization of synthetic solutions and Dan Daji Illela iron poisoning field waters. The oxidation-precipitation method can be used as a pretreatment method before the deferrization unit. DRX analyzes of the precipitates obtained showed the coexistence of two (2) solid phases; goethite (α-FeOOH) G and lepidocrocite (-FeOOH) L for [HCO3-] = 488 mg/L; pHi = 8; [Fe2+]0 = 5 mg/L and T = 30 °C. For the other iron and bicarbonate concentrations and for the other pHi studied, the precipitating phase was mainly goethite.

Carbonate Medium ; Deferrization Unit ; Groundwater ; Initial Ph ; Iron Oxyhydroxide ; Precipitation.

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