Induced effects of gamma irradiation on activated carbon derived from Hyphaene Thebaica husks as a potential adsorbent for chlorpyrifos pesticide-air purification
Yahia, M., Youssef, H., Elfeky, A., Awad, M., Elzaref, A. (2022). Induced effects of gamma irradiation on activated carbon derived from Hyphaene Thebaica husks as a potential adsorbent for chlorpyrifos pesticide-air purification. EKB Journal Management System, 65(4), 449-474. doi: 10.21608/ejchem.2021.98168.4576
Mohamed Yahia; Hanan Farouk Youssef; Ahmed samer Elfeky; Magdy Bahi El-Deen Awad; Ahmed Elzaref. "Induced effects of gamma irradiation on activated carbon derived from Hyphaene Thebaica husks as a potential adsorbent for chlorpyrifos pesticide-air purification". EKB Journal Management System, 65, 4, 2022, 449-474. doi: 10.21608/ejchem.2021.98168.4576
Yahia, M., Youssef, H., Elfeky, A., Awad, M., Elzaref, A. (2022). 'Induced effects of gamma irradiation on activated carbon derived from Hyphaene Thebaica husks as a potential adsorbent for chlorpyrifos pesticide-air purification', EKB Journal Management System, 65(4), pp. 449-474. doi: 10.21608/ejchem.2021.98168.4576
Yahia, M., Youssef, H., Elfeky, A., Awad, M., Elzaref, A. Induced effects of gamma irradiation on activated carbon derived from Hyphaene Thebaica husks as a potential adsorbent for chlorpyrifos pesticide-air purification. EKB Journal Management System, 2022; 65(4): 449-474. doi: 10.21608/ejchem.2021.98168.4576

Induced effects of gamma irradiation on activated carbon derived from Hyphaene Thebaica husks as a potential adsorbent for chlorpyrifos pesticide-air purification

Egyptian Journal of Chemistry
Article 44, Volume 65, Issue 4, April 2022, Page 449-474  XML PDF (2.37 MB)
Document Type: Original Article
DOI: 10.21608/ejchem.2021.98168.4576
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Authors
Mohamed Yahiaorcid 1; Hanan Farouk Yousseforcid 2; Ahmed samer Elfeky3; Magdy Bahi El-Deen Awad4; Ahmed Elzaref email orcid 5
1Chemistry department, Faculty of Science, Al-Azhar university
2National Research Centre
3Chemistry department, Faculty of Sci., Al-Azhar university
4Professor of Physical Chemistry Department, Faculty of Science, Al-Azhar University.
5Lecturer of physical Chemistry department, Faculty of Science, Al-Azhar University, Cairo, Egypt
Abstract
In the current study, Doum palm husk of Hyphaene Thebaica (HT), a local agro-waste, was utilized as a new source to produce activated carbon (HT-AC). The thermally prepared adsorber was chemically activated by phosphoric acid aqueous solution and exposed to γ-ray at doses of 2.5-10 Grays (Gy) for capacity enhancement. Characterization of the obtained products were tested using FT-IR, SEM-EDX, XRD, BET and Raman spectroscopy. The carbon species were then utilized in the ambient air purification from the chlorpyrifos (trade name, Ictafos) pesticide air pollutant. Results showed the development of very high surface area of 1439, 1702 and 1561 m2/g for the parent HT-AC and its HT-AC2.5Gy and HT-AC5Gy irradiated forms, respectively. The experimental and theoretical results clarified the best fitting of pseudo-first-order model in describing the Chlorpyrifos sorption reaction. Thermodynamic analysis revealed physical sorption of the hazardous material onto the surfaces of the activated carbons with exothermic process of non-spontaneous nature. Experimental kinetics presented that, HT-AC2.5Gy had excellent fitting to the Langmuir isotherm model, wherein the adsorption was proceeded in a monolayer manner with a uniform surface energy. Conversely, Freundlich isotherm was perfectly fitted to the original HT-AC and HT-AC5Gy, where the multilayer and heterogeneous adsorption mechanism was exhibited.
Keywords
Activated carbon; Gamma irradiation; Chlorpyrifos; Air purification; Adsorption
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