Contribution to Modelling the Effect of Temperature on Removal of Nickel Ions by Adsorption on Nano-Bentonite

Alakhras, Fadi; Alabbad, Eman A.; Alzamel, N.O.; Abouzeid, Fatma M.; Ouerfelli, N.

doi:10.14233/ajchem.2018.21252

Cited by 10 publications

(6 citation statements)

References 17 publications

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“…However, the variation of the logarithm of charge transfer resistance (ln R ct ) against the inverse of the reciprocal temperature (1/ T ) exhibits a feeble deviation from the linearity of the Arrhenius behavior in our previous work (Fig. 1 of 22 ) and in some results in literature 26 , 32 – 34 . In addition, regarding the suggested pseudo-hyperbolic behavior in previous work 22 where the divergence of the variation of charge transfer resistance ( R ct ) for low temperatures (Fig.…”

Section: Deviation To Arrhenius Behaviorcontrasting

confidence: 41%

“…Treatments of the free Gibbs energy-temperature dependence considering the corresponding thermodynamic parameters (Δ H° ) and (Δ S° ) are rarely done in literature 32 – 34 . The majority consider approximately the constancy of theses parameters and interpret globally the phenomenon governing their studied systems based on their signs (positive or negative), their amounts (high or low values) and not on the eventual slow variation with temperature.…”

Section: Thermodynamic Parameters-temperature Dependencementioning

confidence: 99%

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Effect of acid proticity on the thermodynamic parameters of charge transfer resistance in corrosion and passivation of nickel based glass alloy

Emran,

Ouerfelli

2024

Sci Rep

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The effect of temperature on electrochemical properties of Ni82.3Cr7Fe3Si4.5B3.2 glassy alloy in different acid proticity has been investigated utilizing AC and DC methods. Firstly, the handling of experimental data on the temperature dependence of charge transfer resistance, as well as corrosion current density permits us to determine the values of classical Arrhenius parameters as well as the thermodynamic ones considered approximately independent of temperature. This leads us to deduce a global interpretation on the phenomenon of corrosion and polarization. Secondly, the deviation to the linearity of the Arrhenius behavior and the real dependence on temperature of the thermodynamic parameters, permit us to clearly quantify the effect of the acid proticity and define, for the first time, the concept of current Arrhenius parameters and the current thermodynamic ones, as well as the modeling of the enthalpy–enthalpy compensation. Moreover, the effect of temperature can be investigated using the Vogel–Fulcher–Tammann model to reveal that the corresponding Vogel temperature has an interesting physical meaning.

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Section: Deviation To Arrhenius Behaviorcontrasting

confidence: 41%

Section: Thermodynamic Parameters-temperature Dependencementioning

confidence: 99%

Effect of acid proticity on the thermodynamic parameters of charge transfer resistance in corrosion and passivation of nickel based glass alloy

Emran,

Ouerfelli

2024

Sci Rep

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“…The quantity of metal ions removed at equilibrium, Q e (mg·g −1 ) was evaluated [ 30 ] according tothe following equation:

where C 0 represents the initial metal amount (mg·L −1 ) and C e is the final concentration after 24 h. The volume of solution (L) is represented by V and W symbolizes the amount of dry sorbent (g). The removal amount of metal ions chelated at several intervals [ 31 ] was computed by means of the following equation:

where C t is the metal ion concentration (mg·L −1 ) in solution at different period t .…”

Section: Methodsmentioning

confidence: 99%

Kinetic Studies on the Removal of Some Lanthanide Ions from Aqueous Solutions Using Amidoxime-Hydroxamic Acid Polymer

Alakhras

2018

Journal of Analytical Methods in Chemistry

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Lanthanide metal ions make distinctive and essential contributions to recent global proficiency. Extraction and reuse of these ions is of immense significance especially when the supply is restricted. In light of sorption technology, poly(amidoxime-hydroxamic) acid sorbents are synthesized and utilized for the removal of various lanthanide ions (La3+, Nd3+, Sm3+, Gd3+, and Tb3+) from aqueous solutions. The sorption speed of trivalent lanthanides (Ln3+) depending on the contact period is studied by a batch equilibrium method. The results reveal fast rates of metal ion uptake with highest percentage being achieved after 15–30 min. The interaction of poly(amidoxime-hydroxamic) acid sorbent with Ln3+ ions follows the pseudo-second-order kinetic model with a correlation coefficient R2 extremely high and close to unity. Intraparticle diffusion data provide three linear plots indicating that the sorption process is affected by two or more steps, and the intraparticle diffusion rate constants are raised among reduction of ionic radius of the studied lanthanides.

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“…e removal of Cu(II) can be predicted as a mixture of two effects. Firstly, the rough surface of SSP gives solid contact, resulting in chemisorption of metal ions through ion-exchange mechanism at low concentrations (( 15) and (16). Secondly, the presence of dissolved CaCO 3 leads to the increase of pH, which causes metal precipitation (see formula (20)).…”

Section: Ermodynamic Studymentioning

confidence: 99%

“…erefore, various materials have been investigated as adsorbents to remove different types of pollutants from aqueous solutions [11][12][13]. ese materials include chitosan [14,15], bentonite [16], almond shell [17], pistachio wood [18], Ballota biomass [19], chicken eggshell [20], and oyster shell [21].…”

Section: Introductionmentioning

confidence: 99%

Snail Shells Adsorbent for Copper Removal from Aqueous Solutions and the Production of Valuable Compounds

Ouafi

Asri

Omor

et al. 2021

Journal of Chemistry

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This research explored the efficiency of snail shells powder (SSP) for Cu(II) removal from aqueous solutions and the production of valuable compounds from the residual product. To confirm its chemical and mineral components, the material was characterized by different instrumental techniques. The effects of experimental parameters such as the pH of the solution, the effect of SSP dose, particle size, and initial concentration of Cu(II) on the removal process were studied. The removal of Cu(II) was reasonably fast to be completed within a time frame of 90 min. The kinetics following the pseudo-second-order model (R2 = 0.979) were better compared to the pseudo-first-order model (R2 = 0.896). The increase in pH values leads to an increase in the amount of Cu(II) adsorbed. Afterward, the adsorption capacity reaches stability at pH near 7. The maximum Cu(II) removal occurred with a mass of 8 g·L−1 and a particle size of 300 μm. This particle size presents approximately 44.5% of SSP particles, which is the largest proportion of the sample as shown by particle size analysis. The adsorption isotherm was well described by Langmuir and Freundlich equations. The thermodynamic parameters values showed that the Cu(II) adsorption was a spontaneous and exothermic process. Furthermore, with the presence of CaCO3, the precipitation of Cu(II) in the form of posnjakite occurred with a high Cu(II) removal rate close to 99%. The residual SSP was used for the production of valuable compounds through the thermal decomposition process at various temperatures.

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Contribution to Modelling the Effect of Temperature on Removal of Nickel Ions by Adsorption on Nano-Bentonite

Cited by 10 publications

References 17 publications

Effect of acid proticity on the thermodynamic parameters of charge transfer resistance in corrosion and passivation of nickel based glass alloy

Effect of acid proticity on the thermodynamic parameters of charge transfer resistance in corrosion and passivation of nickel based glass alloy

Kinetic Studies on the Removal of Some Lanthanide Ions from Aqueous Solutions Using Amidoxime-Hydroxamic Acid Polymer

Snail Shells Adsorbent for Copper Removal from Aqueous Solutions and the Production of Valuable Compounds

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