A.E. ElMetwally
Egyptian Petroleum Research Institute
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Publication
Featured researches published by A.E. ElMetwally.
International Journal of Biological Macromolecules | 2016
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
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
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
A.M. Al-Sabagh; F.Z. Yehia; Gh. Eshaq; A.M. Rabie; A.E. ElMetwally
Polymer Degradation and Stability | 2014
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
Gamal M.S. ElShafei; F.Z. Yehia; Gh. Eshaq; A.E. ElMetwally
Journal of Molecular Liquids | 2016
Gh. Eshaq; A.E. ElMetwally
Desalination and Water Treatment | 2016
Gh. Eshaq; A.M. Rabie; A.A. Bakr; A.H. Mady; A.E. ElMetwally
Egyptian Journal of Petroleum | 2015
F.Z. Yehia; Gh. Eshaq; A.M. Rabie; A.H. Mady; A.E. ElMetwally
Desalination and Water Treatment | 2016
A.A. Bakr; Gh. Eshaq; A.M. Rabie; A.H. Mady; A.E. ElMetwally