Kinetics and Thermodynamics of β- Endosulfan Pesticide 2 Adsorptionin Jordan Valley Soils

Kinetics and Thermodynamics of β- Endosulfan Pesticide 2 Adsorptionin Jordan Valley Soils

Nader Mahmoud Sadeq

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Alexandria University

Kinetics and Thermodynamics of β- Endosulfan Pesticide 2 Adsorptionin Jordan Valley Soils

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Abstract

Knowledge of the β-endosulfan adsorption characteristics of soil is necessary for predicting its mobility and fate in soil environments. To examine the characteristics of βendosulfan retention, sorption batch experiments were performed on three Xeropsamments soils having different properties. The sorption data were applied to various kinetics models. The results reveal that the tested models fitted the adsorption data in the order: first-order~modified Freundlich > parabolic diffusion >Elovich. The energy of activation (Ea) and enthalpy (ΔH#), entropy (ΔS#), and free energy of activation (ΔG#) related to β-endosulfan sorption were calculated using the Arrhenius equation. The activation energy (Ea) values (18.57 -38.18 kJ mol -1 ) and the positive ΔH# values characterize β-endosulfan adsorption process onto the sorbents studied as physisorption with an endothermic nature. The negative values of ΔS # (-23–17 J mol -1 ) obtained in this study suggest that the β-endosulfan sorption process involves an associative mechanism.

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No external funding was declared for this work.

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The authors declare no conflict of interest.

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How to Cite This Article

Nader Mahmoud Sadeq. 2020. \u201cKinetics and Thermodynamics of β- Endosulfan Pesticide 2 Adsorptionin Jordan Valley Soils\u201d. Global Journal of Science Frontier Research - H: Environment & Environmental geology GJSFR-H Volume 20 (GJSFR Volume 20 Issue H1): .

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GJSFR Volume 20 Issue H1
Pg. 1- 10

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Crossref Journal DOI 10.17406/GJSFR

Print ISSN 0975-5896

e-ISSN 2249-4626

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GJSFR-H Classification: FOR Code: 250101

Submission ReceivedOctober 8, 2019
Peer Review Double Blind
Handling Editor
Accepted October 31, 2019
Published November 15, 2019

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April 25, 2020

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