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Dive into the research topics where A.E. ElMetwally is active.

Publication


Featured researches published by A.E. ElMetwally.


International Journal of Biological Macromolecules | 2016

Remediation of distilleries wastewater using chitosan immobilized Bentonite and Bentonite based organoclays

F.I. El-Dib; F.M. Tawfik; Gh. Eshaq; Hassan H.H. Hefni; A.E. ElMetwally

Organic-inorganic nanocomposite, namely chitosan immobilized Bentonite (CIB) with chitosan content of 5% was synthesized in an acetic acid solution (2%). Organically modified CIB and Bentonite (mbent.) were prepared by intercalating cetyl trimethylammonium bromide (CTAB) as a cationic surfactant at doses equivalent to 1.5 and 3 times the cation exchange capacity (CEC) of clay. The prepared samples were characterized using FTIR, XRD and SEM to explore the interlayer structure and morphology of the resultant nanocomposites. The remediation of distilleries (vinasse) wastewater process was carried out using different adsorbents including CIB, modified CIB (mCIB), Bentonite (bent.), modified Bentonite (mbent.) and chitosan at different contact time. The results showed that the packing density of surfactant used in the synthesis of organoclays strongly affects the sorption capacity of the clay mineral and also showed that (mCIB)3 was found to be the most effective sorbent in the purification of distilleries wastewater with 83% chemical oxygen demand (COD) reduction and 78% color removal.


Green Chemistry | 2016

Fe3O4-boosted MWCNT as an efficient sustainable catalyst for PET glycolysis

A.M. Al-Sabagh; F.Z. Yehia; D.R.K. Harding; Gh. Eshaq; A.E. ElMetwally

This study focuses on the utilization of Fe3O4-boosted multiwalled carbon nanotubes (MWCNT) as a sustainable, easily recoverable and a robust catalyst in the glycolysis of PET. A maximum yield (100%) of bis(2-hydroxyethyl)terephthalate (BHET) was achieved using Fe3O4-boosted MWCNT, which was higher than any other catalyst used in PET glycolysis with regard to the BHET yield. The extraordinary performance of the prepared Fe3O4-boosted MWCNT is attributed to the synergetic effect induced by both magnetite and MWCNT in the catalytic glycolysis of PET. With regard to sustainability, the catalyst endures the glycolysis process conditions for at least eight sequential runs. The reaction mechanism of PET glycolysis using Fe3O4-boosted MWCNT has also been proposed.


Desalination and Water Treatment | 2015

Role of surface modification of some metal oxides with amino acids in upgrading the sonocatalytic degradation of nitrobenzene

F.Z. Yehia; Gh. Eshaq; A.E. ElMetwally

AbstractThe influence of surface modification of some metal oxides (Fe2O3, CuO, NiO, and CO3O4) with amino acids was investigated in the sonocatalytic degradation of nitrobenzene (NB). Glycine, arginine, and glutamic acid were used as surface modifiers. This modification resulted in a considerable enhancement of sonochemical degradation of NB at pH higher than 7 with respect to the pristine catalysts before modification. Catalysts modified with arginine exhibited the highest degradation extent. The enhanced degradation efficiency was attributed to the promoted coupling via electrostatic attraction between the negatively charged NB molecules and the positively charged arginine layer on the surface of Fe2O3, CuO, NiO, and Co3O4. The attraction capability at all modified metal oxides increased via secondary forces such as hydrogen bonding, n–π and π–π interactions.


Egyptian Journal of Petroleum | 2016

Greener routes for recycling of polyethylene terephthalate

A.M. Al-Sabagh; F.Z. Yehia; Gh. Eshaq; A.M. Rabie; A.E. ElMetwally


Polymer Degradation and Stability | 2014

Cu- and Zn-acetate-containing ionic liquids as catalysts for the glycolysis of poly(ethylene terephthalate)

A.M. Al-Sabagh; F.Z. Yehia; A.M.F. Eissa; M.E. Moustafa; Gh. Eshaq; A.M. Rabie; A.E. ElMetwally


Separation and Purification Technology | 2017

Enhanced degradation of nonylphenol at neutral pH by ultrasonic assisted- heterogeneous Fenton using nano zero valent metals

Gamal M.S. ElShafei; F.Z. Yehia; Gh. Eshaq; A.E. ElMetwally


Journal of Molecular Liquids | 2016

(Mg–Zn)–Al layered double hydroxide as a regenerable catalyst for the catalytic glycolysis of polyethylene terephthalate

Gh. Eshaq; A.E. ElMetwally


Desalination and Water Treatment | 2016

Cr(VI) adsorption from aqueous solutions onto Mg–Zn–Al LDH and its corresponding oxide

Gh. Eshaq; A.M. Rabie; A.A. Bakr; A.H. Mady; A.E. ElMetwally


Egyptian Journal of Petroleum | 2015

Phenol degradation by advanced Fenton process in combination with ultrasonic irradiation

F.Z. Yehia; Gh. Eshaq; A.M. Rabie; A.H. Mady; A.E. ElMetwally


Desalination and Water Treatment | 2016

Copper ions removal from aqueous solutions by novel Ca–Al–Zn layered double hydroxides

A.A. Bakr; Gh. Eshaq; A.M. Rabie; A.H. Mady; A.E. ElMetwally

Collaboration


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Gh. Eshaq

Egyptian Petroleum Research Institute

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F.Z. Yehia

Egyptian Petroleum Research Institute

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A.M. Al-Sabagh

Egyptian Petroleum Research Institute

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A.M. Rabie

Egyptian Petroleum Research Institute

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A.H. Mady

Egyptian Petroleum Research Institute

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A.A. Bakr

Egyptian Petroleum Research Institute

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