Browsing by Author "Ghezali, Katia"

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    Environmental Assessment and Compliance of Wastewater from Arzew Oil Refinery for Future Development and Reuse
    (2022) Ghezali, Katia; Ben Tahar, Nourredine; Otmanine, Ghazi; Guettaf, Naima
    To acquire baseline knowledge on the nature of effluent released into the environment from petroleum refineries in Algeria, and to find more interesting treatment options for industrial wastewaters, the characteristics of Arzew refinery effluent were investigated. Industrial wastewater samples were gathered from the influent, API separator, and discharged into the sea effluent, and then analyzed for different parameters using standard methods. The analysis showed high concentrations of total Suspended Solids (TSS), biological oxygen demand (BOD), chemical oxygen demand (COD), total petroleum hydrocarbons (TPH), and Oil and grease (O&G) contained in the influent wastewater, and reduced to acceptable limits in the discharged effluent based on the Algerian standards for industrial liquid effluents (including refineries). Heavy metals such as cadmium (Cd), copper (Cu), lead (Pb), iron (Fe), zinc (Zn), and total chromium (Cr) were also detected. The findings were compared with the liquid discharge standards of two other Algerian refineries regarding the regulation of liquid effluents from refineries. As a result of these investigations on the evaluation of wastewater treatment processes in the petroleum refinery sector in Algeria, suggestions are recommended for future research toward the development of advanced treatment technologies and the exploitation of recycling in petrochemical and refinery wastewater treatment plants.
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    Potential of canna indica in vertical flow constructed wetlands for Heavy Metals and nitrogen removal from Algiers refinery wastewater
    (MDPT, 2022) Ghezali, Katia; Bentahar, Nourredine; Barsan, Narcis; Eedeff, Valentin; Moșneguțu, Emilian
    Constructed wetlands (CWs) are important plant filters used for wastewater treatment. The behavior of the Canna indica-planted CWs in the face of a highly variable composition of industrial wastewater has yet to be understood. Here, we show the effectiveness of Canna indica-planted and unplanted vertical subsurface flow CWs for the treatment of Algiers petroleum refinery’s effluent. The selected species was placed in the CWs containing light expanded clay aggregate (LECA) and sand as a substrate. The findings indicate that the planted constructed wetlands efficiently removed 85% of total suspended solids (TSS), 96.38% of total nitrogen (TN), 96.15% of nitrate nitrogen (NO3−-N), 99.15% of ammonium nitrogen (NH4+-N), and 99.87% of nitrite nitrogen (NO2−-N). The overall mean removal efficiencies for heavy metals in the vegetated CWs were considerably greater than those of the control. Concentrations of Cr, Cu, Fe, Pb, Zn, Al, Ni, and Cd were calculated in the roots, rhizomes, leaves, and stems of the plant; then, the bioaccumulation factor (BAF) and translocation factor (TF) were determined. An initial examination using scanning electron microscopy (SEM–EDX) was also included in the study. The analysis indicated that toxic elements were adsorbed on plant tissues, concentrated in the roots, and partially transported to the aerial parts. These results are useful for the design of CWs to treat industrial wastewater, enabling water of acceptable quality to be discharged into the environment, especially as a low maintenance and cost-effective technology in developing countries.
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    Short-term laboratory adsorption of zinc and cadmium ions from aqueous solutions to ground canna indica roots
    (Springer Nature, 2023) Ghezali, Katia; Abdelwaheb, Mohamed; Nedeff, Valentin; Moşneguţu, Emilian Florin; Guettaf, N.; Bârsan, Narcis
    The current work presents the competitive removal of zinc (Zn) and cadmium (Cd) ions by adsorption using the roots of the Canna indica plant in order to study the metal-plant interactions at the microscopic scale that occur in constructed wetlands and phytoremediation processes. The sorption process was described in association with the data generated from Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). Kinetic variables and constants were calculated, optimized, and analyzed. The pseudo-second-order kinetic model provided the best fit to the experimental data and the sorption equilibrium was achieved in nearly 300 min. The equilibrium isotherms of zinc and cadmium were described using the nonlinear models of Langmuir, Freundlich, Sips, and their multi-component equivalents. The dimensionless separation factor (R L) showed that the adsorption system in this study is favorable. The Langmuir monolayer adsorption capacities were 71.20 and 298.6 μg g−1 for Zn2+ and Cd2+ respectively. The parameters of the metal adsorption isotherm fitted better to the extended Freundlich isotherm. This study reveals the association between surface properties and the biosorption capacity of heavy metals by plant roots on the one hand and the implication of the ion exchange mechanism through chemisorption on the uptake of Zn2+ and Cd2+ ions from aqueous solution by this adsorbent on the other hand.
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    Traitement des eaux résiduaires industrielles (ERI) par des filtres plantés de canna Indica à flux vertical
    (Universite de Boumerdes : Faculté des Hydrocarbures et de la Chimie, 2023) Ghezali, Katia; Bentahar, Noureddine(Directeur de thèse)
    Le sujet de cette thèse s'inscrit dans le cadre général de l'évaluation des filtres plantés (FP) pour le traitement ou polissage des eaux résiduaires des raffineries de pétrole en Algérie. Les eaux résiduaires de raffinerie de pétrole ont été caractérisées avec différents types de polluants organiques et inorganiques. Dans ce contexte, l’objectif de ce travail de thèse a été de développer des solutions innovantes, permettant la conception de FP pour traiter les eaux usées industrielles, permettant de rejeter une eau de qualité acceptable dans l'environnement, en particulier dans les pays en développement. A cet effet, des pilotes de FP à écoulement vertical sous surfacique (FVSS) plantées avec la macrophytes Canna indica ont été conçues et construites pour le traitement des eaux résiduaires de Raffinerie d’Alger issus du bassin API en termes d'élimination de la matière organique, des nutriments, des solides en suspension et des métaux lourds. Afin d’étudier les interactions plante/polluant, il a été nécessaire de commencer, en premier lieu, par une étape de caractérisation des racines de C. indica par des analyses physico-chimiques (pH, pH PZC , CEC, surface spécifique...) et spectroscopiques (IR, MEBEDX). En deuxième lieu, l’adsorption binaire des métaux de Zn 2+ et Cd 2+ par les racines a révélé le potentiel de Canna Indica en tant que biomatériau sorbant prometteur contre le risque de contamination par les métaux lourds et montre clairement la relation entre les propriétés de surface et la capacité de rétention de ces métaux par les racines des plantes. En dernier lieu, l’étude menée sur l’efficacité des filtres remplis du sable, granulats d'argile expansée et planté de Canna Indica a montré que les filtres plantés pourraient traiter les MES, DCO, les composé azotés (TN, NO 3 - , NH 4 + , NO 2 - ) et les métaux lourds (Cr, Cd, Ni, Pb, Cu, Zn, Al et Fe) des eaux résiduaires de la raffinerie de pétrole en dessous des normes algériennes avec des efficacités d'enlèvement très élevées. De plus, C. indica a eu d'excellentes performances dans l'élimination des métaux lourds. Enfin, les paramètres de conception à grande échelle ont été déterminés pour répondre aux effluents rejetés par la raffinerie