Kinetics and Thermodynamics of Activated Sunflowers Seeds Shell Carbon (SSSC) as Sorbent Material

El-Halwany, M.M.

doi:10.4172/2157-7064.1000183

Cited by 21 publications

(14 citation statements)

References 22 publications

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“…Meanwhile the value obtained for ∆S, sign and magnitude, indicates that the process is reversible (disruption) 42 . For the process stage where the adsorption capacity decreases with temperature increase, values of ∆H and ∆G were negative, which indicated that the process is exothermic and spontaneous, respectively; for its part, the magnitude of ∆H shows that the process occurs through physical adsorption 43 . Meanwhile, the sign and magnitude of S indicate that the process is hardly reversible 42 .The fact that the adsorption process of Ni (II) with palm bagasse presents this behavior under the effect of temperature, suggests that a control system be implemented to prevent system conditions from exceeding this maximum value and avoid a decrease in the amount of nickel removed.…”

Section: Calculation Of Thermodynamic Parametersmentioning

confidence: 99%

Study of the Effect of Temperature in the Remotion of NI (II) on African Palm Bagasse (Elaeis guineensis)

2018

IJCTR

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: Heavy metals are pollutants released into the environment, and are highly available as a result of the increase in different activities where they are used, so their presence in aqueous media causes worldwide concern, as they pose a serious threat to ecosystems by being non-biodegradable, toxic and carcinogenic to living beings. The present work evaluated the effect of temperature and pH on the capacity of African palm bagasse (Elaeis guineensis) to remove nickel present in aqueous solutions, studying the kinetics, equilibrium and thermodynamic parameters that determine the process. For this purpose, it was tested in batch system by varying the temperature and pH of the solution, keeping constant the agitation rate (200 rpm), adsorbent dose (5 g *100ml -1 ), initial metal concentration (100 ppm) and the size of the adsorbent (0.1 mm). It was found that the best adsorption conditions were 54.9 ºC and pH 5.93, obtaining a maximum adsorption capacity of 17.01 mg g -1 corresponding to a removal of 85.14 %. The kinetic model that best fits the experimental data was Elovich and the isotherm that best describes the process is Freundlich, with R 2 of 0.9967 and 0.999, respectively. The determined thermodynamic parameters (∆H 0 , ∆G 0 , ∆S 0 ) suggest that the process is favorable, spontaneous, endothermic and reversible under certain operating conditions. The results show that palm bagasse is a good precursor of Nickel adsorbent.

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Section: Calculation Of Thermodynamic Parametersmentioning

confidence: 99%

Study of the Effect of Temperature in the Remotion of NI (II) on African Palm Bagasse (Elaeis guineensis)

2018

IJCTR

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“…The Langmuir equation is used to estimate the maximum adsorption capacity corresponding to complete monolayer coverage on the adsorbent surface and is expressed by [16]:…”

Section: Langmuir Isothermmentioning

confidence: 99%

Adsorption of Cadmium onto Orange Peels: Isotherms, Kinetics, and Thermodynamics

Mahmoud¹,

Halwany²

2014

J Chromatogr Sep Tech

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Batch adsorption of Cd (II) onto orange peel, a residue of the fruits processing industry, has been studied. Equilibrium isotherms, kinetic data, and thermodynamic parameters have been evaluated. Equilibrium data fit well with Langmuir isotherm model. The kinetic data were found to follow the pseudo-second-order model. The negative ΔHº value indicates the exothermic nature of the adsorption process. Orange peel was shown to be a promising adsorbent for Cd (II) removal from aqueous solutions. α Initial adsorption rate (mg of Cd (II)/g adsorbate. min); Keywords:

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“…The Lagergren-firstorder model describes the sorption capacity of solids in solid-liquid systems [17]. It is supposed that one adsorbate is adsorbed onto one sorption site on adsorbent surface.…”

Section: Kinetics Studiesmentioning

confidence: 99%

Thermodynamics and Kinetics Studies of Mn (II) Removal from Aqueous Solution onto Powder Corn Cobs (PCC)

Mahmoud¹

2015

J Chromatogr Sep Tech

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Kinetics and Thermodynamics of Activated Sunflowers Seeds Shell Carbon (SSSC) as Sorbent Material

Cited by 21 publications

References 22 publications

Study of the Effect of Temperature in the Remotion of NI (II) on African Palm Bagasse (Elaeis guineensis)

Study of the Effect of Temperature in the Remotion of NI (II) on African Palm Bagasse (Elaeis guineensis)

Adsorption of Cadmium onto Orange Peels: Isotherms, Kinetics, and Thermodynamics

Thermodynamics and Kinetics Studies of Mn (II) Removal from Aqueous Solution onto Powder Corn Cobs (PCC)

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