Publications Internationales

Permanent URI for this collectionhttps://dspace.univ-boumerdes.dz/handle/123456789/13

Browse

End date: 2019Subject: search.filters.subject.Kinetics

Search Results

Now showing 1 - 10 of 22
  • No Thumbnail Available
    Item
    Thermodynamic and kinetics studies on adsorption of Indigo Carmine from aqueous solution by activated carbon
    (Elsevier, 2019) Harrache, Zahia; Abbas, Moussa; Aksil, Tounsia; Trarib, Mohamed
    The kinetic and equilibrium parameters of the quantitative adsorption for Indigo Carmine (IC) removed by commercial activated carbon (AC) were studied by UV–visible absorption spectroscopy. AC with a high specific surface area (1250.320 m2/g) was characterized by the Brunauer–Emmett–Teller (BET) method and point of zero charge (pzc). The effect of the initial dye concentration (10–60 mg/L), contact time (0–90 min), pH (1−12), agitation speed (0–600 rpm), adsorbent dose (1–10 g/L) and temperature (298–323 K) were determined to find the optimal conditions for a maximum adsorption. The adsorption mechanism of Indigo Carmine onto AC was studied using the first pseudo order, second pseudo order and Elovich kinetics models. The adsorptions kinetic were found to follow a pseudo second order kinetic model with a determination coefficient (R2) of 0.999. To get an idea on the adsorption mechanism, we applied the Webber-Morris diffusion model. The equilibrium adsorption data for Indigo Carmine on AC were analyzed by the Langmuir, Freundlich, Elovich, Dubinin and Temkin models. The results indicate that the Langmuir model provides the best correlation at 25 °C (qmax = 79.49 mg/g) and Dubinin at 40 °C (qmax = 298.34 mg/g). The adsorption isotherms at different temperatures have been used for the determination of thermodynamic parameters such as free energy (ΔG° = −0.071 to −1.050 kJ/mol), enthalpy (ΔH° = 28.11 kJ/mol), entropy (ΔS° = 0.093 kJ/mol·K) and activation energy (Ea) of 51.06 kJ/mol of adsorption. The negative ΔG° and positive ΔH° values indicate that the overall adsorption is spontaneous and endothermic.
  • No Thumbnail Available
    Item
    Equilibrium and Kinetic Modelling of Astrazon Yellow Adsorption by Sawdust: Effect of Important Parameters
    (2010) Ouazene, Naima; Sahmoune, Mohamed Nasser
    This paper aims to investigate the sorption of Astrazon yellow (A.Y.) onto sawdust (Aleppo pine tree), a forest waste as that acts as a low-cost adsorbent. In our experiments, the batch sorption is studied with respect to solute concentration, contact time, adsorbent dose, particle size and pH. The adsorption process attains equilibrium within 300 minutes. The extent of dye removal decreased with increasing particle size and increased with increasing contact time, adsorbent dose and pH. The equilibrium data were analysed by the Langmuir and Freundlich isotherms. The characteristic parameters for each isotherm were determined. By considering the experimental results and adsorption models applied in this study, it can be concluded that equilibrium data were represented well by the Langmuir isotherm equation. Maximum adsorption capacity calculated at 293K was 81.8 mg/g. Five kinetic models (pseudo-first order, pseudo-second order, fractional power, Elovich and intraparticle diffusion kinetic equations) were used to predict the adsorption rate constants. The kinetics of adsorption of the basic dye followed both Elovich and pseudo-second order kinetics, and intraparticle diffusion was not the sole rate-controlling step. The effective diffusion of Astrazon yellow in sawdust according to Boyd Model was 24.22 .10􀀀12 m2/S. In order to reveal the adsorption characteristic of sawdust samples, SEM and FTIR spectra analyses were carried out. The results show that sawdust (Aleppo pine tree) can be an alternative low-cost adsorbent for removing cationic dyes from wastewater.
  • No Thumbnail Available
    Item
    Removal of gentian violet in aqueous solution by activated carbon equilibrium, kinetics, and thermodynamic study
    (SAGE Publications, 2019) Abbas, Moussa; Harrache, Zahia; Trari, Mohamed
    The quantitative kinetic and equilibrium adsorption parameters for chlorure de méthylrosaniline (gentian violet, crystal violet) removed by commercial activated carbon were studied by UV–visible spectroscopy.Activated carbon with a high specific surface area 1250 m2/g was characterized by the Brunauer, Emmett et Teller (BET) method and the zero charge point pH (pzc). The adsorption properties of both activated carbon with gentian violet were conducted at variable stirring speed 100–700 trs/min, adsorbent dose 1–8 g/l, solution pH 1–14, initial gentian violet concentration 5–15 mg/l, contact time 0–50 min, and temperature 299–323 K using batch mode operation to find the optimal conditions for a maximum adsorption. The adsorption mechanism of gentian violet was studied using the pseudo-first-order, pseudo-second-order, and Elovich kinetic models. The adsorption kinetics was found to follow a pseudo-second-order kinetic model with a determination coefficient (R2) of 0.999. The Weber–Morris diffusion model was applied for the adsorption mechanism. The equilibrium adsorption data of gentian violet were analyzed by the Langmuir, Freundlich, Elovich, and Temkin models. The results indicate that the Langmuir model provides the best correlation (qmax = 22.727, 32.258 mg/g at 26 and 40°C, respectively). The adsorption isotherms at different temperatures have been used for the determination of thermodynamic parameters, i.e. free energy (ΔG° = − 2.30 to −5.34 kJ/mol), enthalpy (ΔH° = 36.966 kJ/mol), entropy (ΔS° = 0.131 kJ/mol K), and activation energy (Ea) 40.208 kJ/mol of gentian violet adsorption. The negative ΔG° and positive ΔH° indicate that the overall adsorption is spontaneous and endothermic in nature
  • No Thumbnail Available
    Item
  • No Thumbnail Available
    Item
    Hydrolytic decontamination of methyl parathion in the presence of 2-aminoethanol : kinetics study
    (Pesticide Science Society of Japan, 2018) Doumandji, Lotfi; Moussiden, Anissa; Ihdene, Zaher; Hamada, Boudjema
  • No Thumbnail Available
    Item
    Combustion study of phoenicicole biomass in Algerian oasis using thermogravimetric analysis : deglet nour cultivar case
    (Springer, 2018) Bousdira, Khalida; Bousdira, Dina; Bekkouche, Sidi Mohammed El Amine; Yahiaoui, Fatma Zohra; Nouri, L’Hadi; Legrand, Jack
  • No Thumbnail Available
    Item
    Adsorption of auramine-O using activated globe artichoke leaves : kinetic and isotherm studies
    (Chemic Publishing Company, 2017) Laribi, Kahina; Sahmoune, Mohamed Nasser
  • No Thumbnail Available
    Item
    Adsorption of auramine-O using activated globe artichoke leaves : kinetic and isotherm studies
    (Chemic Publishing Company, 2017) Laribi, Kahina; Sahmoune, Mohamed Nasser
    The aim of this work was to study the removal of auramine-O (Au-O) from aqueous solution using powder prepared from globe artichoke leaves chemically activated with NaOH solution. The physico-chemical characteristics of the samples were performed and the characterization by FT-IR analysis has been carried out to examine the structure of globe artichoke leaves before and after activation. Scanning electron microscope was used to analyze the surface change of the globe artichoke leaves before and after adsorption of dye solution. A comparison of two models on the overall adsorption rate showed that the kinetic of adsorption was better described by the pseudo-second order model. The equilibrium data fitted very well to Langmuir model with maximum monolayer adsorption capacity of 344.8 mg g-1 at 298 K. This study shows that the globe artichoke leaves can be used as low cost alternative adsorbent for removal of auramine-O
  • No Thumbnail Available
    Item
    Biosorption of Congo red dye by Aspergillus carbonarius M333 and Penicillium glabrum Pg1 : Kinetics, equilibrium and thermodynamic studies
    (Elsevier, 2017) Bouras, Hadj Daoud; Yeddou, Ahmed Réda; Bouras, Noureddine; Hellel, Djamila; Holtz, Michael D.; Sabaou, Nasserdine; Chergui, Abdelmalek; Nadjemi, Boubekeur
  • No Thumbnail Available
    Item
    Removal of cyanide in aqueous solution by oxidation with hydrogen peroxide in presence of activated carbon prepared from olive stones
    (Elsevier, 2010) Yeddou, Ahmed Reda; Nadjemi, Boubakeur; Halet, Farid; Ould-Dris, Aïssa; Capart, Richard