Browsing by Author "Ziati, Mounir"

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    Adsorption and removal of hydroxychloroquine from aqueous media using Algerian kaolin : full factorial optimisation, kinetic, thermodynamic, and equilibrium studies
    (Taylor and Francis, 2021) Bendjeffal, Hacene; Ziati, Mounir; Aloui, Amel; Metidji, Toufek; Djebli, Abdelkrim; Bouhedja, Yacine
    The large diffusion of drugs and their derivatives in our life has become a very serious environmental problem, which requires the development of new and low techniques for their removal from aquatic media. In this context, we studied the use of Algerian kaolin as alow-cost and eco-friendly adsorbent for the elimination of hydroxychloroquine (HCQ) from water. The natural kaolin was characterised by FTIR, SEM, BET, and XRD technique. To obtain a suitable removal of this drug, three physicochemical factors, including the kaolin dose (0.05–0.15 g/L), HCQ initial concentration (5–50 mg/L), and medium pH (3–7) were optimised using the full factorial design (FFD) model. Additionally, a regression quadratic model representing the HCQ adsorption amount (Qe) was developed and validated by analysis of variance (ANOVA). The compromise optimal conditions for the three input variables and Qe as the dependent output variable were obtained using response surface methodology (RSM) and the composite desirability function approach. The optimal parameters were found to be 0.15 g/L of kaolin, 5 mg/L as HCQ initial concentration, and pH 7. The modelling study indicated that the sorption mechanism obeys the pseudo-second-order kinetic model, and the adsorption isotherms follow the Langmuir model with Qe reached 51 mg/g. The thermodynamic study indicates that the adsorption of HCQ is spontaneous, exothermic, and has a stable configuration
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    Effect of the olive mill wastewater on corrosion behaviour of carbon steel
    (2019) Yahia, Zineb; Ziati, Mounir; Aissiou, Nabila; Bounoughaz, Moussa
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    Efficiency evaluation of electrocoagulation process for reducing the environmental impact of olive mill wastewater
    (American Scientific Publishers, 2017) Ziati, Mounir; Cherifi, Ouiza; Didouche, Yasmina-Fadila; Hazourli, Sabir
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    The Performance of Electro-Fenton (EF) Process in the Removal of the organic polluting load of the olive mill wastewater
    (IEE, 2024) Yahia, Zineb; Ziati, Mounir
    The treatment of olive mill wastewater is one of the most important environmental problems for Mediterranean countries. This effluent contains many organic compounds like polyphenols. This study focuses on performance evaluation of the electro-Fenton process, using graphite electrodes and hydrogen peroxide (H2O2) for removal of polyphenols and chemical oxygen demand from olive mill wastewater. The experiments are carried out at different values of the potential and for different pH of the medium. The results obtained under the optimal conditions show that 81% of the chemical oxygen demand and 77% of the polyphenols were eliminated when the pH = 3 and the imposed potential is 2 Volt.
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    Reduction of turbidity and chromium content of tannery wastewater by electrocoagulation process
    (Water Environment Federation, 2018) Ziati, Mounir; Khemmari, Fariza; Aitbara, Adel; Hazourli, Sabir
    The present study is carried out to remove chromium and turbidity from tannery wastewater using the electrocoagulation process with aluminum electrodes. This experimental study is carried out using a batch system. The applied pilot comprises a reactor containing two parallel metal electrodes (Al). The latter are connected as monopolar, and a different potential is applied between them. Several working parameters, such as applied potential difference, electrolysis time, active electrode surface, interelectrode distance, and the pH of the medium have been studied to achieve higher removal efficiency. The treatment reached a maximum reduction of 99% for turbidity and 93% for chromium under the following conditions: 15 V applied potential difference, 45 cm 2 electrode surface, 1 cm interelectrode distance, pH 6.1 raw water, and a contact time of 90 min. Given the treatment efficiency obtained in this study, electrocoagulation process has the potential to be used for the cost-effective removal of wastewater pollutants.
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    Removal of chromium from tannery wastewater by electrosorption on carbon prepared from peach stones : effect of applied potential
    (2017) Ziati, Mounir; Khemmari, Fariza; Kecir, Mohamed; Hazourli, Sabir
    The objective of this study is the removal of chromium from tannery wastewater by electrosorption on carbon prepared from lignocellulosic natural residue "peach stones' thermally treated. The followed steps for obtaining coal in chronological order were: cleaning, drying, crushing and finally its carbonization at 900°C. The characterization of the carbon material resulted in properties comparable to those of many coals industrially manufactured. The study of the dynamic adsorption of chromium on the obtained material resulted in a low removal rate (33.7%) without applied potential. The application of negative potentials of -0.7 V and -1.4 increases the adsorption of chromium up to 90% and 96% respectively. Whereas a positive potential of +1.4V allows desorption of the contaminant of 138%
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    Removal of polyphenols from olive mill wastewater by adsorption on activated carbon prepared from peach stones
    (Cartimex, 2017) Ziati, Mounir; Khemmari, Fariza; Cherifi, Ouiza; Didouche, Yasmina-Fadila
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    Techniques de séparation de phases et chromatographie : Destiné aux étudiants de troisième année licence chimie analytique
    (Université M’hamed Bougarra Boumerdès : Faculté des Sciences, 2022) Ziati, Mounir
    Les techniques de séparation telle que la chromatographique sont utilisées dans divers domaines, tels que la chimie fine, la parfumerie, l’oenologie, l’industrie pétrolière, la biologie, l’industrie des matières plastiques, etc. C’est une technique d'analyse qualitative et quantitative dans laquelle l'échantillon contenant une ou plusieurs substances est entraîné par un courant de phase mobile, qui peut être liquide, gaz ou fluide supercritique, le long d'une phase stationnaire, qui peut être du papier, de la gélatine, de la silice, un polymère, de la silice greffée etc. Chaque substance se déplace à une vitesse donnée, dépendant de ses caractéristiques (polaire, non polaire, ionique, …), et de celles des deux phases. Elle permet de déterminer la composition d’un mélange par comparaison à des espèces chimiques de référence, de confirmer ou d’infirmer la présence d’une ou plusieurs espèces chimiques dans une substance. La chromatographie est aussi utilisée pour connaître la concentration de chaque composé d'un mélange (qualité et quantité) et même leur structure quand elle est couplée (Chromatographie gazeuse-spectroscopie de masse, chromatographie liquide-résonnance magnétique nucléaire, chromatographique liquide-infrarouge