Browsing by Author "Cheurfi, Wassila"

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    Assessment Of Surface Water Quality In The Beni Haroun Dam Algeria Using X-ray Fluorescence Spectrometry After Preconcentration
    (Oum-El-Bouaghi University, 2020) Aouati, Mohamed Khelil; Laidoudi, Mouloud; Cheurfi, Wassila; Baghriche, Abdelfeteh; Bougherara, Hassina; Kebabi, Brahim
    X-ray fluorescence spectrometry after preconcentration of the water of Beni Haroun dam (BHD), Mila, Algeria. Has carried out with two different methods which yielded the contents as following Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, As, Se, Br, Rb, Sr, Y, Zr, Mo, Cd, Ba and Pb. The first method is preconcentration at evaporation temperature (PET), this method based on the recovery of limestone, and it is simple and cheaper. Whereas the second preconcentration method is based on the absorption of cations on Amberlite XAD -7 resin (AXAD-7R). The effect of certain parameters such as pH, temperature, conductivity, Nitrate dosage, chemical oxygen demand (COD) and limit of detection has been studied. The detection limits were reached for Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, Mn, Fe, Zn, As, Br, Sr, Zr, In and Ba, during the four seasons of the year 2018. In this Water, the X-ray diffraction analysis showed the existence of the following phases: Calcium Carbonate Hydrate: CaCO3 H2O, Sodium Chloride NaCl and silicon dioxide SiO2. The principal component analysis (PCA) has been studied. The matrix of correlation between trace element and the PCA indicates that they come from similar sources. This explains the anthropogenic contributions of agricultural pollution by runoff water, discharges of domestic water and soil erosion. Regular monitoring of heavy metals in Beni Haroun dam water has recommended avoiding any risk of excessive accumulation.
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    Characterization Of The Sludge Of Batna (algeria) Waste Water Treatment Plant For Its Valorization
    (Oum-El-Bouaghi University, 2017) Boudraa, Issam; Bougherara, Hassina; Cheurfi, Wassila; Kebabi, Brahim
    The treated waste waters of the city of Batna (Algeria) hold for about half of the needs of the land farmers in water in this area. The treatment of these waters generates a sludge which is rich in nitrogenous and phosphorous compounds and in organic matters. The purpose of this study is the characterization of this sludge in order to use it as a fertilizer. The X-ray fluorescence analysis allowed detecting the following element in this sludge : Mg, Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, As, Se, Br, Rb, Sr, Y, Zr, Mo, Cd, Ba, Pb. The mass of the previous elements hold 38.52% of the dried sludge total mass. In this sludge, the X-ray diffraction analysis showed the existence of the following phases: (Mg0.03Ca0.97)CO3, SiO2, ZnO, Cu2O and BaPbO3. The trace metals which are present in Batna waste water treatment plant, and the content of which is limited, are the following: Cd, Cr, Cu, Ni, Pb and Zn. Their contents are 40 mg/Kg, 240 mg/Kg, 70 mg/Kg, 830 mg/Kg and 3890 mg/Kg, respectively. An extraction in aqueous solution was used for determining the amount of dissolved ions nitrate, chemical oxygen demand (COD) and pH. The results obtained are 530 mg/Kg, 850 mg/Kg and 7.28, respectively.