In this study, natural zeolite (mordenite) was modified by using dimetliyldioctadecylammonium bro... more In this study, natural zeolite (mordenite) was modified by using dimetliyldioctadecylammonium bromide (DDAB) with polyvinyl alcohol (PVA) to afford surfactant modified granular zeolite (SMGZ) as adsorbent for humic acid (HA) removal. Column adsorption studies were carried out to examine the optimum conditions for the removal of HA by SMGZ. The optimum loading of surfactant was later utilized in characterization studies. The SMGZ were characterized by XRD. FTIR. BET specific surface area and FESEM. The removal of HA was performed in a fixed bed reactor. The effects of different experimental parameters such as DDAB loading levels, solution pH and HA solution flow rate were evaluated. Samples were collected and analyzed using UV. The results indicated that SMGZ showed great enhanced adsorption capacity of HA compared to natural granular zeolite due to the hydrophobic interaction and hydrogen bonding. The equilibrium uptake (geq(exp)) of HA decreased with increasing, flow rate and granu...
In attempt to improve the biological activity of the well-known drug hydroxychloroquine (HQC), ei... more In attempt to improve the biological activity of the well-known drug hydroxychloroquine (HQC), eight derivatives (HQ1-4Py – HQ8-4Py) based on the core of HQC were design and their electronic properties including frontier molecular orbitals, total energy and structural parameters were estimated at semi-empirical PM3 levels. Pharmacological parameters such as physicochemical, pharmacokinetics, drug-likeness and medicinal chemistry friendliness have been evaluated to estimate the drugs similarity. Introducing these moieties affect both electronic and drug likeness properties, HQ5-Py shows promised properties such large Eg and good clogP, The obtained results show that the suggested derivates may represent a potential drug candidate for COVID-19. Keywords: Molecular similarity, COVID-19, Hydroxychloroquine (HCQ).
Experimental realization was carried out using available activated carbon pine cone powder (ACPP)... more Experimental realization was carried out using available activated carbon pine cone powder (ACPP) as alternative adsorbent for characterized and removal of total organic carbon (TOC) from laundry aqueous solutions, phosphoric acid as an activated factor and microwave as heating source. X-ray diffraction (XRD) spectrum, Fourier-transform infrared spectrometry (FTIR), nitrogen adsorption-desorption isotherms and Brunauer-Emmett-Teller specific surface area and field emission scanning electron microscopy (FESEM) were used to study the surface properties of the ACPP. Using microwave irradiation gives rise to decrease of operation time, savings and homogeneous heating of samples, as opposed to furnace heating. The effects of heat methods, H 3 PO 4 concentration, microwave radiation power, microwave radiation time, temperature, initial TOC concentration, ACPP dosage, primary solution pH and soaking time were experimentally studied by batch method to estimate the adsorption capacity, kinetics and equilibrium. The chemical composition of ACPP before and after the modified form is discussed in relation to the XRD, FTIR, SEM and specific surface area results. The results showed that the surface and chemical composition of ACPP samples were modified by H 3 PO 4 under microwave radiation are changed after modification. Experimental results showed that the highest removal efficiency and adsorption capacity for removal of TOC took place at basic pH and concentration of 20% of H 3 PO 4. The TOC uptake process obeyed the pseudo-first-order kinetic expression and was best qualified by the Langmuir isotherm. Thermodynamic studies revealed that TOC adsorption on ACPP was exothermic and also spontaneous in nature. The results showed that pine cone could be used as a low-cost alternative for removal of TOC from laundry water.
Natural organic matter (NOM) is ubiquitous in aquatic environments and has recently become an iss... more Natural organic matter (NOM) is ubiquitous in aquatic environments and has recently become an issue of worldwide concern in drinking water treatment. The major component of NOM is humic acids (HA). In this study, a natural zeolite (mordenite) was modified employing hexadecyltrimethylammonium bromide (HDTMA) to enhance greater efficient sites for sorption of HA. The natural zeolite and surfactant-modified zeolite (SMZ) were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectrometer (FT-IR), N 2 Adsorption-desorption isotherms and BET-specific surface area, thermographic analysis, derivative thermographic analysis (TGA-DTA) and Field emission scanning electron microscopy (FESEM). A fixed-bed reactor was used for the removal of HA and the effects of different experimental parameters such as HDTMA loading levels, HA solution flow rate, solution pH and eluent concentration were investigated. The results indicated that the SMZ bed with HDTMA loading of 75% of external cation exchange capacity (ECEC) at a flow rate of 2 BV/h and pH of 10 showed the greatest enhanced removal efficiency of HA while ethanol solutions (25%v/v) with feed flow rate of 2 BV/h were sufficient for complete regeneration of SMZ and desorption of HA. Measurements of surface area of SMZ indicated that a monolayer formation of the surfactant at those conditions allowed the optimum removal of HA.
In this study, natural zeolite (mordenite) was modified by using dimetliyldioctadecylammonium bro... more In this study, natural zeolite (mordenite) was modified by using dimetliyldioctadecylammonium bromide (DDAB) with polyvinyl alcohol (PVA) to afford surfactant modified granular zeolite (SMGZ) as adsorbent for humic acid (HA) removal. Column adsorption studies were carried out to examine the optimum conditions for the removal of HA by SMGZ. The optimum loading of surfactant was later utilized in characterization studies. The SMGZ were characterized by XRD. FTIR. BET specific surface area and FESEM. The removal of HA was performed in a fixed bed reactor. The effects of different experimental parameters such as DDAB loading levels, solution pH and HA solution flow rate were evaluated. Samples were collected and analyzed using UV. The results indicated that SMGZ showed great enhanced adsorption capacity of HA compared to natural granular zeolite due to the hydrophobic interaction and hydrogen bonding. The equilibrium uptake (geq(exp)) of HA decreased with increasing, flow rate and granu...
In attempt to improve the biological activity of the well-known drug hydroxychloroquine (HQC), ei... more In attempt to improve the biological activity of the well-known drug hydroxychloroquine (HQC), eight derivatives (HQ1-4Py – HQ8-4Py) based on the core of HQC were design and their electronic properties including frontier molecular orbitals, total energy and structural parameters were estimated at semi-empirical PM3 levels. Pharmacological parameters such as physicochemical, pharmacokinetics, drug-likeness and medicinal chemistry friendliness have been evaluated to estimate the drugs similarity. Introducing these moieties affect both electronic and drug likeness properties, HQ5-Py shows promised properties such large Eg and good clogP, The obtained results show that the suggested derivates may represent a potential drug candidate for COVID-19. Keywords: Molecular similarity, COVID-19, Hydroxychloroquine (HCQ).
Experimental realization was carried out using available activated carbon pine cone powder (ACPP)... more Experimental realization was carried out using available activated carbon pine cone powder (ACPP) as alternative adsorbent for characterized and removal of total organic carbon (TOC) from laundry aqueous solutions, phosphoric acid as an activated factor and microwave as heating source. X-ray diffraction (XRD) spectrum, Fourier-transform infrared spectrometry (FTIR), nitrogen adsorption-desorption isotherms and Brunauer-Emmett-Teller specific surface area and field emission scanning electron microscopy (FESEM) were used to study the surface properties of the ACPP. Using microwave irradiation gives rise to decrease of operation time, savings and homogeneous heating of samples, as opposed to furnace heating. The effects of heat methods, H 3 PO 4 concentration, microwave radiation power, microwave radiation time, temperature, initial TOC concentration, ACPP dosage, primary solution pH and soaking time were experimentally studied by batch method to estimate the adsorption capacity, kinetics and equilibrium. The chemical composition of ACPP before and after the modified form is discussed in relation to the XRD, FTIR, SEM and specific surface area results. The results showed that the surface and chemical composition of ACPP samples were modified by H 3 PO 4 under microwave radiation are changed after modification. Experimental results showed that the highest removal efficiency and adsorption capacity for removal of TOC took place at basic pH and concentration of 20% of H 3 PO 4. The TOC uptake process obeyed the pseudo-first-order kinetic expression and was best qualified by the Langmuir isotherm. Thermodynamic studies revealed that TOC adsorption on ACPP was exothermic and also spontaneous in nature. The results showed that pine cone could be used as a low-cost alternative for removal of TOC from laundry water.
Natural organic matter (NOM) is ubiquitous in aquatic environments and has recently become an iss... more Natural organic matter (NOM) is ubiquitous in aquatic environments and has recently become an issue of worldwide concern in drinking water treatment. The major component of NOM is humic acids (HA). In this study, a natural zeolite (mordenite) was modified employing hexadecyltrimethylammonium bromide (HDTMA) to enhance greater efficient sites for sorption of HA. The natural zeolite and surfactant-modified zeolite (SMZ) were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectrometer (FT-IR), N 2 Adsorption-desorption isotherms and BET-specific surface area, thermographic analysis, derivative thermographic analysis (TGA-DTA) and Field emission scanning electron microscopy (FESEM). A fixed-bed reactor was used for the removal of HA and the effects of different experimental parameters such as HDTMA loading levels, HA solution flow rate, solution pH and eluent concentration were investigated. The results indicated that the SMZ bed with HDTMA loading of 75% of external cation exchange capacity (ECEC) at a flow rate of 2 BV/h and pH of 10 showed the greatest enhanced removal efficiency of HA while ethanol solutions (25%v/v) with feed flow rate of 2 BV/h were sufficient for complete regeneration of SMZ and desorption of HA. Measurements of surface area of SMZ indicated that a monolayer formation of the surfactant at those conditions allowed the optimum removal of HA.
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Papers by Awad Elsheikh