Hadeel G El-Shorbagy
@Al-Menoufia
Faculty of science
Al-Menoufia Water and Wastewater Company, Menoufia, Egypt
Hadeel El-Shorbagy, I'm holding a Ph.D. in Environmental Organic Chemistry; I have four research articles published in international journals. In addition to the academic and research experience, I have practical experience in water treatment, natural product , analytical chemistry.
EDUCATION
Ph.D. in Environmental Organic Chemistry.
RESEARCH INTERESTS
Water treatment, adsorption, chitosan
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Hadeel G. El-Shorbagy, Salah M. El-Kousy, Khalid Z. Elwakeel, and M.A. Abd El-Ghaffar
Elsevier BV
Abstract A new economic method of modifying chitosan based on direct condensation reaction between chitosan and phenolic acids “Gallic or Caffeic acids” to produce new condensation adducts RI and RII. The new adducts structure and morphology were confirmed by physical and chemical tools such as FTIR, TGA, SEM, elemental analysis, water regain, dissociation in acidic medium, and point of zero charge. The new adducts were evaluated as silver ions adsorbents. The new adducts showed efficient removal of toxic silver ions from the aqueous medium with removal efficiency reached 100% and 92.66% for RI and RII respectively. Factors affecting on adsorption process as well as Kinetics, equilibrium, and thermal properties of adsorption were studied using conventional equations. Both adducts showed good re-use ability lasted for three cycles.
Salah M. El-Kousy, Hadeel G. El-Shorbagy, and M.A. Abd El-Ghaffar
Elsevier BV
Abstract New modified chitosan nano-montmorillonite composites were synthesized for efficient removal of Methylene Blue (MB) pollutant. The composites' structure and morphology were confirmed by 1H NMR, FTIR, TGA, SEM, XRD, XPS, water regain, stability in acidic medium, and pHpzc. Factors influencing dye adsorption; nano-montmorillonite ratio, initial dye concentration, composite dose, pH, temperature, contact time, and desorption were investigated. The new modified composites showed very fast adsorption performance and equilibrium occurred after 8 min with adsorption capacity 248.9, 276.03, 204.39, and 180 mg/g for R0, RI, RII, and RIII respectively. MB adsorption is a multilayer process preceded via electrostatic attraction in alkaline medium and/or cation exchange in acidic medium. Adsorption data is well-fitting to Freundlich isotherm and pseudo-second-order kinetics. The composites prepared showed high desorption ability amounting to 77.13, 84.28, 88.47, and 97% for R0, RI, RII, and RIII respectively by using 0.5 M HCl eluent.
Khalid Z. Elwakeel, S. El-Kousy, Hadeel G. El-Shorbagy, and M.A. Abd El-Ghaffar
Elsevier BV
Abstract Chitosan was modified through four different modification routes. First, epichlorohydrine cross-linked Chitosan was grafted with 3-Amino-1,2,4 triazole,5-thiol and melamine to produce RI and RII, respectively. Second, glutaraldehyde cross-linked chitosan was chemically modified using ammonium hydroxide then grafted with 3-Amino-1,2,4 triazole,5-thiol and melamine to produce RIII and RIV, respectively. The prepared polymers were characterized via FTIR, TGA, elemental analysis, water regain and surface area. RIII and RIV shows higher thermal stability, bigger surface area, and lower water regain, than RI and RII. Removal of Reactive Black 5 (RB5) anions from their aqueous solutions were studied using the modified chitosan adsorbents under various parameters such as pH, agitation time, and temperature. The maximum adsorption capacities are 0.492, 0.330, 0.622 and 0.698 mmol g −1 for RI, RII, RIII, and RIV, respectively, at pH 3 and 25 °C. The nature of interaction of RB5 with the adsorbents was identified. Uptake kinetics and adsorption isotherms were modeled using conventional and simple equations: best results were respectively obtained with the pseudo-second order rate equation and the Langmuir equation. The thermodynamic parameters have been calculated: the adsorption is endothermic, spontaneous and contributes to increase the entropy (randomness) of the system. RI and RII gives higher desorption yield than RIII and RIV, this probably due to the presence of the quaternary ammonium moiety in the last two sorbents.
Khalid Z. Elwakeel, M. A. Abd El-Ghaffar, Salah M. El-Kousy, and Hadeel G. El-Shorbagy
Informa UK Limited
Chitosan was cross-linked using epichlorohydrine to form chitosan gel. The resins obtained were chemically modified through the reaction with to 1,1,1,3,3,3 hexafloro,2-bis (3-amino,2-hydroxyphenyl) propane to produce resin (RI), 3-amino-1,2,4 triazole,5-thiol to produce resin (RII), and melamine to produce resin (RIII). The uptake of Reactive Black 5 (RB5) from aqueous media by the obtained resins was studied using batch method. Various parameters such as pH, agitation time, RB5 concentration and temperature were studied. The resins showed high affinity for the adsorption of RB5 where uptake values of 0.63, 0.45, and 0.33 mmol/g were reported for resins RI, RII, and RIII, respectively at 25°C. Both kinetics and thermodynamic parameters of the process were estimated. These data indicated an endothermic spontaneous adsorption process and kinetically followed the pseudo-second order model, Fickian diffusion low and Elovich equation. Desorption of RB5 from the surface of the prepared resins was efficiently done using sodium hydroxide.
Khalid Z. Elwakeel, M.A. Abd El-Ghaffar, Salah M. El-kousy, and Hadeel G. El-Shorbagy
Elsevier BV
Abstract Chitosan/gluteraldehyde resin was chemically modified using ammonium hydroxide to produce (RI) resin, which was additionally semi cross-linked with epichlorohydrine through hydroxyl group of chitosan. The obtained resin was modified with 3-Amino-1,2,4 triazole,5-thiol to produce resin (RII)/or melamine to produce resin (RIII). The uptake of modified chitosan resins toward Brilliant Blue R250 (BBR250) from aqueous media was studied using batch method. Various parameters such as pH, agitation time and temperature had been studied. The resins showed high affinity for the adsorption of BBR250 from aqueous media where uptake values of 0.97, 0.79 and 2.505 mmol/g were reported for resins RI, RII and RIII at 25 °C, respectively. Both kinetics and thermodynamic parameters of the process were estimated. These data indicated an endothermic spontaneous adsorption process and kinetically followed the pseudo-second order model, Fickian diffusion low and Elovich model. Desorption of BBR250 from the prepared resins was efficiently done using sodium hydroxide.