Browsing by Author "Barkat, D."

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    LIQUID-LIQUID EXTRACTION OF IRON (III) FROM OUENZA IRON ORE LEACH LIQUOR BY TRIBUTYLPHOSPHATE
    (University of Eloued جامعة الوادي, 2017-09-01) Nouioua, A.; Barkat, D.
    The solvent extraction of iron (III) from the hydrochloric acid leach liquor of iron ore from mine of Ouenza, Algeria with tributylphosphate (TBP) in chloroform was studied. The effect of several parameters, such as contact time, HCl concentration, TBP concentration and chloride inorganic salt (KCl) concentration on the efficiency of extraction of iron was examined at 19±2 °C. It was found that, for 2 min 3M TBP in presence of 5M HCl and 2 M of KCl can cause high extraction (98.57 %) of iron (III). The stoichiometry of the extracted species was determined by using the method of slope analysis. The number of moles of H+,  and TBP associated with the extracted species was determined and the extracted species was found to be HFeCl4(TBP)2.
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    Study Of The Extraction Of Cobalt(ii) From Sulphate Medium By Using Capric Acid Dissolved In Chloroform
    (University of Eloued جامعة الوادي, 2017-01-01) Slimani, A.; Barkat, D.
    In this work we have first investigated the extraction of cobalt(II) from sulphate medium using capric acid dissolved in chloroform and then the effect of other diluents on the extraction process at 25°C. This study aims to understand the behaviour followed by this metal or, in other words, find its stoichiometry at the end of the extraction. This deportment is strongly dependent on many parameters like pH of the aqueous solution, acid concentration and the nature of the solvent. Each one of these parameters will be discussed. Temperature is another parameter that will be studied in this work. At the end of this research, we have found that stoichiometry of Co(II) complex is of the type CoA2(HR)2 (HR is an abridgment of capric acid). The equilibrium constant Kex and the thermodynamic parameters ΔH°, ΔS°, and ΔG° have been evaluated.