10 results on '"Shadi W. Hasan"'
Search Results
2. TiO2 ceramic membrane decorated with Fe3O4–Ag composite nanoparticles for produced water treatment
- Author
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Ahmed Mamdouh Aboulella, Vijay S. Wadi, Vincenzo Naddeo, Ahmed F. Yousef, Fawzi Banat, and Shadi W. Hasan
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Titanium ,Ceramics ,Membranes ,Surface coating ,Silver ,Environmental Engineering ,Health, Toxicology and Mutagenesis ,Public Health, Environmental and Occupational Health ,Metal Nanoparticles ,Fouling ,Produced water ,Membranes, Artificial ,Water Purification ,General Medicine ,General Chemistry ,Pollution ,Artificial ,Environmental Chemistry - Published
- 2022
3. Enhanced water flux and bacterial resistance in cellulose acetate membranes with quaternary ammoniumpropylated polysilsesquioxane
- Author
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Ravi P. Pandey, Parashuram Kallem, P. Abdul Rasheed, Khaled A. Mahmoud, Fawzi Banat, Woei Jye Lau, and Shadi W. Hasan
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Environmental Engineering ,Health, Toxicology and Mutagenesis ,Public Health, Environmental and Occupational Health ,Escherichia coli ,Environmental Chemistry ,Membranes, Artificial ,Organosilicon Compounds ,General Medicine ,General Chemistry ,Cellulose ,Pollution ,Hydrophobic and Hydrophilic Interactions - Abstract
An enhanced water flux and anti-fouling nanocomposite ultrafiltration membrane based on quaternary ammoniumpropylated polysilsesquioxane (QAPS)/cellulose acetate (QAPS@CA) was fabricated by in situ sol-gel processing via phase inversion followed by quaternization with methyl iodide (CH
- Published
- 2021
4. Enhanced water permeability and fouling resistance properties of ultrafiltration membranes incorporated with hydroxyapatite decorated orange-peel-derived activated carbon nanocomposites
- Author
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Mariam Ouda, Parashuram Kallem, G. Bharath, Fawzi Banat, and Shadi W. Hasan
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Environmental Engineering ,Materials science ,Health, Toxicology and Mutagenesis ,Ultrafiltration ,Permeability ,Nanocomposites ,Contact angle ,Adsorption ,stomatognathic system ,medicine ,Environmental Chemistry ,Nanocomposite ,Fouling ,Public Health, Environmental and Occupational Health ,Water ,Membranes, Artificial ,General Medicine ,General Chemistry ,Pollution ,Membrane ,Durapatite ,Chemical engineering ,Charcoal ,Pyrolysis ,Activated carbon ,medicine.drug - Abstract
Hydroxyapatite-decorated activated carbon (HAp/AC) nanocomposite was synthesized and utilized as a nanofiller to fabricate a novel type of polyethersulfone (PES) nanocomposite ultrafiltration (UF) membranes. Activated carbon (AC) derived from orange peel was synthesized by low-temperature pyrolysis at 400 °C. A hydroxyapatite/AC (HAp/AC) nanocomposite was developed by a simple one-pot hydrothermal synthesis method. The UF membrane was fabricated by intercalating HAp/AC fillers into PES casting solution by the non-solvent induced phase separation (NIPS) process. The prepared membranes exhibited a lower water contact angle than the pristine PES membrane. The hybrid membrane with 4 wt% HAp/AC nanocomposite displayed 4.6 times higher pure water flux (~660 L/m2 h) than that of the pristine membrane (143 L/m2 h). In static adsorption experiments, it was found that the amount of humic acid (HA) and bovine serum albumin (BSA) adsorbed by the HAp/AC-PES hybrid membrane was much lower than that of the original membrane due to the electrostatic repulsive forces between them and the surface of the membrane. Irreversible fouling was reduced from 33 to 6 % for HA and from 46 to 8 % for BSA after HAp/AC was incorporated into the PES matrix. After 7 cycles of water-BSA-water, the HAp/AC-PES hybrid membrane maintained a high pure water flux of 540 L/m2 h with an excellent flux recovery ratio (FRR), demonstrating the long-term stability of the membranes. The developed UF membranes outperformed the original PES membranes in terms of permeability, selectivity, and antifouling.
- Published
- 2021
5. Valorization of groundnut shell via pyrolysis: Product distribution, thermodynamic analysis, kinetic estimation, and artificial neural network modeling
- Author
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Shadi W. Hasan, Abdul Hai, Krishnamoorthy Rambabu, Muhammad Daud, G. Bharath, Imtiaz Ali, Pau Loke Show, and Fawzi Banat
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Environmental Engineering ,Materials science ,Health, Toxicology and Mutagenesis ,0208 environmental biotechnology ,Enthalpy ,Analytical chemistry ,Biomass ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,Biochar ,Environmental Chemistry ,Inert gas ,0105 earth and related environmental sciences ,Public Health, Environmental and Occupational Health ,General Medicine ,General Chemistry ,Pollution ,Product distribution ,020801 environmental engineering ,Kinetics ,Fluidized bed ,Yield (chemistry) ,Thermogravimetry ,Thermodynamics ,Neural Networks, Computer ,Pyrolysis - Abstract
Pyrolysis of agricultural biomass is a promising technique for producing renewable energy and effectively managing solid waste. In this study, groundnut shell (GNS) was processed at 500 °C in an inert gas atmosphere with a gas flow rate and a heating rate of 10 mL/min and 10 °C/min, respectively, in a custom-designed fluidized bed pyrolytic-reactor. Under optimal operating conditions, the GNS-derived pyrolytic-oil yield was 62.8 wt.%, with the corresponding biochar (19.5 wt.%) and biogas yields (17.7 wt.%). The GC-MS analysis of the GNS-based bio-oil confirmed the presence of (trifluoromethyl)pyridin-2-amine (18.814%), 2-Fluoroformyl-3,3,4,4-tetrafluoro-1,2-oxazetidine (16.23%), 5,7-dimethyl-1H-Indazole (11.613%), N-methyl-N-nitropropan-2-amine (6.5%) and butyl piperidino sulfone (5.668%) as major components, which are used as building blocks in the biofuel, pharmaceutical, and food industries. Furthermore, a 2 × 5 × 1 artificial neural network (ANN) architecture was developed to predict the decomposition behavior of GNS at heating rates of 5, 10, and 20 °C/min, while the thermodynamic and kinetic parameters were estimated using a non-isothermal model-free method. The Popescu method predicted activation energy (Ea) of GNS biomass ranging from 111 kJ/mol to 260 kJ/mol, with changes in enthalpy (ΔH), Gibbs-free energy (ΔG), and entropy (ΔS) ranging from 106 to 254 kJ/mol, 162–241 kJ/mol, and −0.0937 to 0.0598 kJ/mol/K, respectively. The extraction of high-quality precursors from GNS pyrolysis was demonstrated in this study, as well as the usefulness of the ANN technique for thermogravimetric analysis of biomass.
- Published
- 2021
6. Preparation of TiO
- Author
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Sara S, Marzouk, Vincenzo, Naddeo, Fawzi, Banat, and Shadi W, Hasan
- Subjects
Titanium ,Ceramics ,Water ,Membranes, Artificial ,Silicon Dioxide - Abstract
Produced water, a by-product generated from the oil and gas extraction processes, represents a major challenge in the oil and gas industry as it is generally characterized with a very high salinity and oil content. Currently used ceramic membranes for oil-water separation suffer from the low water flux in spite of their several distinctive advantages. To overcome this limitation and to increase the water flux and oil rejection, commercial ceramic TiO
- Published
- 2020
7. Designed assembly of Ni/MAX (Ti
- Author
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G, Bharath, Abdul, Hai, K, Rambabu, T, Pazhanivel, Shadi W, Hasan, and Fawzi, Banat
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Ions ,Titanium ,Humans ,Graphite ,Electrodes ,Porosity ,Ecosystem ,Water Purification - Abstract
The contamination of aquatic ecosystems by fluoride and heavy metal ions constitute an environmental hazard and has been proven to be harmful to human health. This study explores the feasibility of using asymmetric capacitive deionization (CDI) electrodes to remove such toxic ions from wastewater. An asymmetric CDI cell was fabricated using 2D Ni/MAX as an anode and 3D porous reduced graphene oxide (pRGO) as a cathode for the electrosorption of F
- Published
- 2020
8. Microalgae harvesting using colloidal gas aphrons generated from single and mixed surfactants
- Author
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Priyabrata Pal, Aiza Gay Corpuz, Shadi W. Hasan, Mika Sillanpää, and Fawzi Banat
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Ammonium bromide ,Environmental Engineering ,Dodecylbenzene ,Health, Toxicology and Mutagenesis ,0208 environmental biotechnology ,Chlorella vulgaris ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,Surface-Active Agents ,chemistry.chemical_compound ,Pulmonary surfactant ,Microalgae ,Spirulina ,Humans ,Environmental Chemistry ,Sodium dodecyl sulfate ,0105 earth and related environmental sciences ,Spirulina (genus) ,Microbubbles ,Aqueous solution ,Chromatography ,biology ,Chemistry ,Public Health, Environmental and Occupational Health ,General Medicine ,General Chemistry ,biology.organism_classification ,Pollution ,Colloidal Gas Aphrons ,020801 environmental engineering - Abstract
Harmful algal blooms (HABs) caused by microalgae are becoming increasingly common and pose serious threats to human health, aquaculture, and marine environments and, therefore, their removal is becoming essential. Colloidal gas aphrons (CGAs), a recent technology adapted in flotation, showed promise in removing several contaminants from aqueous solutions. This study aimed to investigate the potency of CGAs in removing several microalgae strains (Spirulina platensis, Nannochloropsis oculata, and Chlorella vulgaris) from aqueous solutions. Surfactants, including cationic hexadecyl trimethyl ammonium bromide (HTAB), anionic sodium dodecylbenzene sulfonate (SDBS), sodium dodecyl sulfate (SDS), and their mixes, were used to prepare stable CGAs. The effect of different environmental parameters like algae concentration, pH, and salinity, on removing Spirulina platensis was thoroughly investigated. Operating conditions, including surfactant type, flotation time, flowrate, and solution temperature, were optimized. At pH 5 and 50 °C, Spirulina platensis, Chlorella vulgaris, and mixed microalgae were fully removed using CGAs produced from cationic HTAB surfactant. About 95% removal of Nannochloropsis oculata was achieved using mixed surfactant CGAs. The results obtained from this work demonstrated the promising potential of CGAs produced from both single and mixed surfactants in harvesting various microalgae from aqueous media.
- Published
- 2021
9. Supercritical carbon dioxide extraction of plant phytochemicals for biological and environmental applications – A review
- Author
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Shadi W. Hasan, Thanigaivelan Arumugham, Pau Loke Show, Fawzi Banat, Jörg Rinklebe, and Krishnamoorthy Rambabu
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Environmental Engineering ,Health, Toxicology and Mutagenesis ,Phytochemicals ,0208 environmental biotechnology ,Context (language use) ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,Environmental Chemistry ,0105 earth and related environmental sciences ,Supercritical carbon dioxide ,Chemistry ,Extraction (chemistry) ,Public Health, Environmental and Occupational Health ,Chromatography, Supercritical Fluid ,General Medicine ,General Chemistry ,Carbon Dioxide ,Plants ,Pollution ,Supercritical fluid ,020801 environmental engineering ,Process conditions ,Solvent ,Pervasive technology ,Temperature and pressure ,Solvents ,Biochemical engineering - Abstract
Recently, supercritical fluid CO2 extraction (SFE) has emerged as a promising and pervasive technology over conventional extraction techniques for various applications, especially for bioactive compounds extraction and environmental pollutants removal. In this context, temperature and pressure regulate the solvent density and thereby effects the yield, selectivity, and biological/therapeutic properties of the extracted components. However, the nature of plant matrices primarily determines the extraction mechanism based on either density or vapor pressure. The present review aims to cover the recent research and developments of SFE technique in the extraction of bioactive plant phytochemicals with high antioxidant, antibacterial, antimalarial, and anti-inflammatory activities, influencing parameters, process conditions, the investigations for improving the yield and selectivity. In another portion of this review focuses on the ecotoxicology and toxic metal recovery applications. Nonpolar properties of Sc-CO2 create strong solvent strength via distinct intermolecular interaction forces with micro-pollutants and toxic metal complexes. This results in efficient removal of these contaminants and makes SFE technology as a superior alternative for conventional solvent-based treatment methods. Moreover, a compelling assessment on the therapeutic, functional, and solvent properties of SFE is rarely focused, and hence this review would add significant value to the SFE based research studies. Furthermore, we mention the limitations and potential of future perspectives related to SFE applications.
- Published
- 2021
10. Designed assembly of Ni/MAX (Ti3AlC2) and porous graphene-based asymmetric electrodes for capacitive deionization of multivalent ions
- Author
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T. Pazhanivel, G. Bharath, Krishnamoorthy Rambabu, Shadi W. Hasan, Abdul Hai, and Fawzi Banat
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Environmental Engineering ,Aqueous solution ,Materials science ,Capacitive deionization ,Graphene ,Reducing agent ,Health, Toxicology and Mutagenesis ,Metal ions in aqueous solution ,0208 environmental biotechnology ,Inorganic chemistry ,Public Health, Environmental and Occupational Health ,Nanoparticle ,02 engineering and technology ,General Medicine ,General Chemistry ,010501 environmental sciences ,Electrochemistry ,01 natural sciences ,Pollution ,020801 environmental engineering ,law.invention ,Anode ,law ,Environmental Chemistry ,0105 earth and related environmental sciences - Abstract
The contamination of aquatic ecosystems by fluoride and heavy metal ions constitute an environmental hazard and has been proven to be harmful to human health. This study explores the feasibility of using asymmetric capacitive deionization (CDI) electrodes to remove such toxic ions from wastewater. An asymmetric CDI cell was fabricated using 2D Ni/MAX as an anode and 3D porous reduced graphene oxide (pRGO) as a cathode for the electrosorption of F−, Pb2+, and As(III) ions. A simple microwave process was used for the synthesis of Ni/MAX composite using fish sperm DNA (f-DNA) as a cross-linker between MAX nanosheets (NSs) and the metallic Ni nanoparticles (NPs). Further, pRGO anode was prepared through effective reduction of RGO using lemon juice as green reducing agent with the assist of f-DNA as a structure-directing agent for the formation of 3D network. With this tailored nanoarchitecture, pRGO and Ni/MAX electrodes exhibited a high specific capacitance of 760 and 385 F g−1, respectively. The fabricated Ni/MAX and pRGO based CDI system demonstrated a high electrosorption capacity of 68, 76, and 51 mg g−1 for the monovalent F−, divalent Pb2+, and trivalent As(III) ions at 1.4 V in neutral pH. Furthermore, Ni/MAX//pRGO system was successfully applied for the removal of total F(T), Pb(T), and As(T) ions from real industrial wastewater and contaminated groundwater. The present findings indicate that the fabricated Ni/MAX//pRGO electrode has excellent electrochemical properties that can be exploited for the removal of anionic and cationic metal ions from aqueous solutions in a CDI based system.
- Published
- 2021
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