Browsing by Author "El-Azazy, Marwa"
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Application of a definitive screening design for the synthesis of a charge-transfer complex of sparfloxacin with tetracyanoethylene: Spectroscopic, thermodynamic, kinetics, and DFT computational studies
El-Shafie, Ahmed S.; Khashan, Areej W.; Husseina, Yasser H. A.; El-Azazy, Marwa ( Royal Society of Chemistry , 2019 , Article)Herein, a spectrochemical approach was adopted to study the charge-transfer (CT) complexation of sparfloxacin (SFX) with tetracyanoethylene (TCNE). In this study, a three-level design of experiments (DOE) involving a ... -
Application of Pineapple Leaves as Adsorbents for Removal of Rose Bengal from Wastewater: Process Optimization Operating Face-Centered Central Composite Design (FCCCD)
Hassan, Siham S.; El-Shafie, Ahmed S.; Zaher, Nourhan; El-Azazy, Marwa ( Multidisciplinary Digital Publishing Institute (MDPI) , 2020 , Article)Adsorptive removal of rose bengal (RB) from contaminated water samples was approached using pineapple leaves (PAL). Three adsorbents were utilized for that purpose; raw pineapple leaves (RPAL) and the thermally activated ... -
Application of Plackett-Burman Design for Spectrochemical Determination of the Last-Resort Antibiotic, Tigecycline, in Pure Form and in Pharmaceuticals: Investigation of Thermodynamics and Kinetics.
El-Shafie, Ahmed S; Yousef, Aseel; El-Azazy, Marwa ( MDPI , 2022 , Article)Tigecycline (TIGC) reacts with 7,7,8,8-tetracyanoquinodimethane (TCNQ) to form a bright green charge transfer complex (CTC). The spectrum of the CTC showed multiple charge transfer bands with a major peak at 843 nm. The ... -
Application of Samarium- and Terbium-Sensitized Luminescence via a Multivariate-Based Approach for the Determination of Orbifloxacin
Al-Hashimi, Nessreen; El-Shafie, Ahmed S.; Jumaa, Asmaa; El-Azazy, Marwa ( Hindawi , 2022 , Article)A lanthanide-based optical sensor has been developed for the sensitive and reliable spectrofluorometric determination of the fluoroquinolone antibiotic orbifloxacin (ORLX). Reaction of ORLX and two lanthanide metal ions, ... -
Bio-Waste Aloe vera Leaves as an efficient adsorbent for Titan Yellow from Wastewater: Structuring of a novel adsorbent using Plackett-Burman factorial design
El-Azazy, Marwa; Dimassi, Sarra N.; El-Shafie, Ahmed S.; Issa, Ahmed A. ( Multidisciplinary Digital Publishing Institute (MDPI) , 2019 , Article)Titan yellow (TY), a triazene azo dye, was removed from contaminated wastewater samples using a green adsorbent recycled from Aloe vera leaves (AV) waste. Two adsorbents were developed-air-dried Aloe vera (ADAV) and thermally ... -
Biochar for agronomy, animal farming, anaerobic digestion, composting, water treatment, soil remediation, construction, energy storage, and carbon sequestration: a review
Osman, Ahmed I.; Fawzy, Samer; Farghali, Mohamed; El-Azazy, Marwa; Elgarahy, Ahmed M.; Fahim, Ramy Amer; Maksoud, M. I.A.Abdel; Ajlan, Abbas Abdullah; Yousry, Mahmoud; Saleem, Yasmeen; Rooney, David W.... more authors ... less authors ( Springer , 2022 , Article Review)In the context of climate change and the circular economy, biochar has recently found many applications in various sectors as a versatile and recycled material. Here, we review application of biochar-based for carbon sink, ... -
A Comparison between Different Agro-wastes and Carbon Nanotubes for Removal of Sarafloxacin from Wastewater: Kinetics and Equilibrium Studies
El-Azazy, Marwa; El-Shafie, Ahmed S.; Elgendy, Ahmed; Issa, Ahmed A.; Al-Meer, Saeed; Al-Saad, Khalid A.... more authors ... less authors ( Multidisciplinary Digital Publishing Institute (MDPI) , 2020 , Article)In the current study, eco-structured and efficient removal of the veterinary fluoroquinolone antibiotic sarafloxacin (SARA) from wastewater has been explored. The adsorptive power of four agro-wastes (AWs) derived from ... -
Competitive adsorptive removal of promazine and promethazine from wastewater using olive tree pruning biochar: operational parameters, kinetics, and equilibrium investigations
El-Azazy, Marwa; El-Shafie, Ahmed S.; Fawzy, Samer; Rooney, David W.; Osman, Ahmed I. ( Springer Nature , 2023 , Article)This research aims to remove two phenothiazines, promazine (PRO) and promethazine (PMT), from their individual and binary mixtures using olive tree pruning biochar (BC-OTPR). The impact of individual and combinatory effects ... -
Crosslinked chitosan–montmorillonite composite and its magnetized counterpart for the removal of basic fuchsin from wastewater: Parametric optimization using Box-Behnken design
Ahmed S., El-Shafie; El-Azazy, Marwa ( Elsevier , 2024 , Article)Treating wastewater polluted with organic dyestuffs is still a challenge. In that vein, facile synthesis of a structurally simple composite of chitosan with montmorillonite (CS-MMT) using glutaraldehyde as a crosslinker ... -
Eco-structured adsorptive removal of tigecycline from wastewater: Date pits’ biochar versus the magnetic biochar
El-Azazy, Marwa; El-Shafie, Ahmed S.; Al-Meer, Saeed; Al-Saad, Khalid A. ( Multidisciplinary Digital Publishing Institute (MDPI) , 2020 , Article)Non-magnetic and magnetic low-cost biochar (BC) from date pits (DP) were applied to remove tigecycline (TIGC) from TIGC-artificially contaminated water samples. Pristine biochar from DP (BCDP) and magnetite-decorated biochar ... -
Electrochemical Analysis of Sulfisoxazole Using Glassy Carbon Electrode (GCE) and MWCNTs/Rare Earth Oxide (CeO2 and Yb2O3) Modified-GCE Sensors
El-Azazy, Marwa; Ahsan, Insharah; Bensalah, Nasr ( MDPI , 2022 , Article)In this work, new electrochemical sensors based on the modification of glassy carbon electrode (GCE) with multiwalled carbon nanotubes (MWCNTs)—rare metal oxides (REMO) nanocomposites were fabricated by drop-to-drop method ... -
Green tea waste as an efficient adsorbent for methylene blue: Structuring of a novel adsorbent using full factorial design
El-Azazy, Marwa; El-Shafie, Ahmed S.; Yousef, Bayan Al Shaikh ( Multidisciplinary Digital Publishing Institute (MDPI) , 2021 , Article)Adsorptive removal of methylene blue (MB) from contaminated water samples was achieved using green tea waste (GTW). Adsorption of MB onto raw (RGTW) and thermally treated waste (TTGTW250–TTGTW500) was explored. The performance ... -
Performance of Pristine versus Magnetized Orange Peels Biochar Adapted to Adsorptive Removal of Daunorubicin: Eco-Structuring, Kinetics and Equilibrium Studies
El-Shafie, Ahmed S.; Barah, Farahnaz G.; Abouseada, Maha; El-Azazy, Marwa ( Multidisciplinary Digital Publishing Institute (MDPI) , 2023 , Article)Drugs and pharmaceuticals are an emergent class of aquatic contaminants. The existence of these pollutants in aquatic bodies is currently raising escalating concerns because of their negative impact on the ecosystem. This ... -
Potato Peels as an Adsorbent for Heavy Metals from Aqueous Solutions: Eco-Structuring of a Green Adsorbent Operating Plackett-Burman Design
El-Azazy, Marwa; El-Shafie, Ahmed S.; Issa, Ahmed A.; Al-Sulaiti, Maetha; Al-Yafie, Jawaher; Shomar, Basem; Al-Saad, Khalid... more authors ... less authors ( Hindawi Limited , 2019 , Article)Treatment of wastewater is becoming a concern of an increasing prominence. Trace amounts of toxic metalloids and heavy metals (HMs) would contaminate large volumes of water. Being present as traces, removal of these ... -
Synthesis and Application of Cobalt Oxide (Co3O4)-Impregnated Olive Stones Biochar for the Removal of Rifampicin and Tigecycline: Multivariate Controlled Performance
El-Shafie, Ahmed S.; Ahsan, Insharah; Radhwani, Mohamed; Al-Khangi, Mohammed Ali; El-Azazy, Marwa ( MDPI , 2022 , Article)Cobalt oxide (Co3O4) nanoparticles supported on olive stone biochar (OSBC) was used as an efficient sorbent for rifampicin (RIFM) and tigecycline (TIGC) from wastewater. Thermal stabilities, morphologies, textures, and ... -
Synthesis and Application of Cobalt Oxide (Co3O4)-Impregnated Olive Stones Biochar for the Removal of Rifampicin and Tigecycline: Multivariate Controlled Performance
El-Shafie, Ahmed S.; Ahsan, Insharah; Radhwani, Mohamed; Al-Khangi, Mohammed Ali; El-Azazy, Marwa ( Multidisciplinary Digital Publishing Institute (MDPI) , 2022 , Article)Cobalt oxide (Co3O4) nanoparticles supported on olive stone biochar (OSBC) was used as an efficient sorbent for rifampicin (RIFM) and tigecycline (TIGC) from wastewater. Thermal stabilities, morphologies, textures, and ... -
Techno-economic assessment of waste mandarin biochar as a green adsorbent for binary dye wastewater effluents of methylene blue and basic fuchsin: Lab- and large-scale investigations
Ahmed S., El-Shafie; Rahman, Evana; GadelHak, Yasser; Mahmoud, Rehab; El-Azazy, Marwa ( Elsevier , 2024 , Article)Treating polluted wastewater effluents on a large-scale requires the development of high performance and cost-effective adsorbents. The recycling of waste mandarin peels, an environmentally friendly, and copiously available ... -
TiO2-functionalized biochar from pistachio nutshells: adsorptive removal and photocatalytic decolorization of methyl orange
El-Shafie, Ahmed S.; Abouseada, Maha; El-Azazy, Marwa (2023 , Article)Pistachio nutshells-derived biochar (PNS-BC) was utilized as a cost-effective adsorbent for competently removing a model dye, methyl orange (MO) from wastewater. Three concentrations of TiO2; 1%, 2%, and 3% were used to ... -
Turning waste avocado stones and montmorillonite into magnetite-supported nanocomposites for the depollution of methylene blue: adsorbent reusability and performance optimization
El-Shafie, Ahmed S.; Karamshahi, Fatima; El-Azazy, Marwa ( Springer Nature , 2023 , Article)The existence of methylene blue (MB) in wastewater even as traces is raising environmental concerns. In this regard, the performances of four adsorbents, avocado stone biochar (AVS-BC), montmorillonite (MMT), and their ... -
Utilization of 7-chloro-4-nitrobenzo-2-oxa-1,3-diazole (NBD-Cl) for spectrochemical determination of L-ornithine: A multivariate optimization-assisted approach
Aly, Hend; El-Shafie, Ahmed S.; El-Azazy, Marwa ( Royal Society of Chemistry , 2019 , Article)A simple and highly sensitive univariate calibration strategy based on ultraviolet-visible (UV-Vis) absorption spectroscopy and assisted by multivariate screening and optimization was utilized for the determination of ...