Experienced Professor with a demonstrated history of working in environmental analytical chemistry and industrial pollution abatement projects . Experienced Professional with over 4 working with the Egyptian Environmental Affairs Agency in the field of Industrial project identification, formulation and implementation. Skilled in Microsoft Word, Lecturing, Environmental Impact Assessment, Public Speaking, and High-Performance Liquid Chromatography (HPLC) and other topics concerning analytical and environmental chemistry. Strong education professional with a Doctor of Philosophy (Ph.D.) focused in Environmental Physical and Biological Sciences from Ain Shams University, MSc from Univeristy of Alberta, Edmonton, Canada and a BSc from the American University in Cairo.
International Journal of Materials Technology and Innovation, 2023
Raw talc (RT) and mechanically activated talc (MAT) were prepared and utilized as adsorbents for ... more Raw talc (RT) and mechanically activated talc (MAT) were prepared and utilized as adsorbents for removing Crystal Violet (CV) and Acid Red 1 (AR1) from aqueous solutions. We investigated the impact of pH, dye concentration, conditioning time, and temperature on the removal efficiency of acid and basic dyes by RT and MAT samples. The results demonstrate that MAT exhibited significantly higher adsorption capacities, with values of 160 mg/g for CV and 130 mg/g for AR1-2-3 times greater than those of RT. Experimental data revealed that the adsorption of both dyes by RT followed the Temkin isotherm, while MAT followed the Freundlich isotherm. Additionally, the adsorption behavior of CV and AR1 on MAT and RT followed a pseudo-second-order process, with intra-particle diffusion being the rate-limiting step for the adsorption kinetics of AR1 onto RT. The enhanced adsorption performance of MAT was attributed to its high pore volume and the presence of multi-charged sites resulting from the rupture of chemical bonds through intensive material grinding. Physical properties of RT and MAT were further investigated using XRD analysis, FTIR, zeta potential, particle size, and Brunauer-Emmet-Teller (BET) analysis. The results revealed that intensive grinding caused significant crystal dislocations in raw talc, leading to a noticeable shift in its isoelectric point (IEP), an increase in surface area, and a decrease in pore size. These findings provide supporting evidence for the observed adsorption results.
In this work, the removal of aniline blue (AB) and methyl violet (MV) from aqueous solution using... more In this work, the removal of aniline blue (AB) and methyl violet (MV) from aqueous solution using chitosan (Cs) and chitosan/activated carbon biomass prepared from eggplant (CS/AC E) and pomegranate peels (Cs/AC P) was investigated. The respective Cs/biomass was formed from the carbonized eggplant and pomegranate peels which was activated with 0.1 M ZnCl 2 prior to their incorporation. The dye removal process was studied in batch system with respect to the initial pH, contact time, temperature, adsorbent weight and the initial dye concentration. The results indicated that optimal (AB) and (MV) removal was achieved at pH 5 and after 5 h contact time. The experimental data was best fitted to pseudo-second-order model for both dyes based upon the obtained R 2 values. As well, the process followed the Freundlich isotherm model. The thermodynamic parameters (∆Hº, ∆Sº and ∆Gº) for the prepared adsorbents uptake of both dyes indicated that the process was endothermic and spontaneous for AB, however, it was non spontaneous for MV. keywords: Chitosan / biomass, eggplant and pomegranate peel activated carbon, aniline blue, and methyl violet.
International Journal of Materials Technology and Innovation, 2023
Raw talc (RT) and mechanically activated talc (MAT) were prepared and utilized as adsorbents for ... more Raw talc (RT) and mechanically activated talc (MAT) were prepared and utilized as adsorbents for removing Crystal Violet (CV) and Acid Red 1 (AR1) from aqueous solutions. We investigated the impact of pH, dye concentration, conditioning time, and temperature on the removal efficiency of acid and basic dyes by RT and MAT samples. The results demonstrate that MAT exhibited significantly higher adsorption capacities, with values of 160 mg/g for CV and 130 mg/g for AR1-2-3 times greater than those of RT. Experimental data revealed that the adsorption of both dyes by RT followed the Temkin isotherm, while MAT followed the Freundlich isotherm. Additionally, the adsorption behavior of CV and AR1 on MAT and RT followed a pseudo-second-order process, with intra-particle diffusion being the rate-limiting step for the adsorption kinetics of AR1 onto RT. The enhanced adsorption performance of MAT was attributed to its high pore volume and the presence of multi-charged sites resulting from the rupture of chemical bonds through intensive material grinding. Physical properties of RT and MAT were further investigated using XRD analysis, FTIR, zeta potential, particle size, and Brunauer-Emmet-Teller (BET) analysis. The results revealed that intensive grinding caused significant crystal dislocations in raw talc, leading to a noticeable shift in its isoelectric point (IEP), an increase in surface area, and a decrease in pore size. These findings provide supporting evidence for the observed adsorption results.
In this work, the removal of aniline blue (AB) and methyl violet (MV) from aqueous solution using... more In this work, the removal of aniline blue (AB) and methyl violet (MV) from aqueous solution using chitosan (Cs) and chitosan/activated carbon biomass prepared from eggplant (CS/AC E) and pomegranate peels (Cs/AC P) was investigated. The respective Cs/biomass was formed from the carbonized eggplant and pomegranate peels which was activated with 0.1 M ZnCl 2 prior to their incorporation. The dye removal process was studied in batch system with respect to the initial pH, contact time, temperature, adsorbent weight and the initial dye concentration. The results indicated that optimal (AB) and (MV) removal was achieved at pH 5 and after 5 h contact time. The experimental data was best fitted to pseudo-second-order model for both dyes based upon the obtained R 2 values. As well, the process followed the Freundlich isotherm model. The thermodynamic parameters (∆Hº, ∆Sº and ∆Gº) for the prepared adsorbents uptake of both dyes indicated that the process was endothermic and spontaneous for AB, however, it was non spontaneous for MV. keywords: Chitosan / biomass, eggplant and pomegranate peel activated carbon, aniline blue, and methyl violet.
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Papers by Farida M . S . E . El-Dars