Ahmed A. Alibrahimi | Thi-Qar UNIVERSITY (original) (raw)

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Papers by Ahmed A. Alibrahimi

Research paper thumbnail of Methylene Blue Dye Removal from Aqueous Solutions and Photocatalytic Activity Using UV/Nano-TiO : Operating Parameters Study

Analytical Chemistry Letters, 2015

The activated carbon samples (SC and PC) were prepared from papyrus plant by chemical activation ... more The activated carbon samples (SC and PC) were prepared from papyrus plant by chemical activation with sulfuric acid and phosphoric acid, respectively. The SC and PC were then modified with nitric acid to give the oxidized sulfuric carbon (OSC) and oxidized phosphoric carbon (OPC) and utilized for removing Methylene Blue (MB) from aqueous solution with initial dye concentration (5-650) mg/L and a temperature of 25-45°C. The effects of pH, contact time, initial concentration of MB and temperature on adsorption, as well as the thermodynamics and kinetics were investigated. The experimental results showed that: (1) The adsorption capacity of MB was dependent upon pH and maximum adsorption occurs at pH 8. (2) The adsorption process was in good agreement with the Langmuir adsorption isotherm model. (3) The adsorption kinetics followed a pseudo-second order kinetic model and intra particle diffusion was involved in the adsorption process. (4) Thermodynamic results indicated that the adsorption process was spontaneous and endothermic in nature. The proposed adsorbent was successfully applied for the removal of Methylene Blue (MB) from aqueous solution with a percent recovery of the sample SC 98.9%, PC 98.3%, OSC 97.5%, OPC 95.05% when using 0.1-1M HCl.

Research paper thumbnail of Taking Advantage of the Rapid Growing Water Hyacinth Plant in the Iraqi Rivers

The ability of natural plants to remove contaminants from water can be exploited to produce water... more The ability of natural plants to remove contaminants from water can be exploited to produce water suitable for human, plant and animal use. The study is based upon the preparation of solid stationary phases of plants that include a high amount of cellulose water hyacinth plant after several treatments and chemical modifications give many static phases which have been prepared from it and helped in the removal of organic pollutants dyes Methylene Blue. Chemo-therapy is done with acid H3PO4. Chemical modifications use oxidizing acids such as HNO3. The tributary groups, that will compensate for the active carbon surface, are diagnosed by FTIR analysis. To identify the shape of the particles and the nature of the carbon surface, the Scanning Electron Microscope SEM should be used. The surface area of the stationary phases molecules has been measured. Several effects on stationary phases of pH solution, concentration and temperature are studied to determine the efficiency of stationary p...

Research paper thumbnail of Removing Metal Ions of Cobalt (II) from Aqueous Solutions By CaO Nanoparticle

Journal of Physics: Conference Series

Colloidal particles of"Calcium0oxide" CaO" nanoparticles0were prepared by the (sol-,gel)method)fr... more Colloidal particles of"Calcium0oxide" CaO" nanoparticles0were prepared by the (sol-,gel)method)from(CaCl2). The study focused on the removal of metal Co(II) from aqueous solutions by adsorption process. Powder CaO was calcination at temperature 500oC. The 9 structural (characteristics) of the synthesized sorbent-were investigated, by-means of (X-ray) analysis "XRD" FTIR spectroscopy, "transmission electron microscope" (TEM), "scanning electron microscope" (SEM) and surface area. The effect of various parameters like as the effect of pH (2, 5, 7, 8 and 10), initial concentration for metal ion Co(II) (50-350 mg/L) and temperature difference (5, 25, 45 and 65) oC. Almost complete removal (99 %) of metal ion Co(II) was obtained within 30 min at an optimum adsorbent dose of 0.05 mg for initial Co(II) concentration of 50 mg/L at pH = 7, room temperature (≈ 25oC) were achieved.

Research paper thumbnail of Solid Phase Extraction and Determination of Cationic Azo Dye from Aqueous Solution Using Dried Papyrus Plant

Ahmed A. Alibrahimi, 2015

The dried papyrus plant (DP) treated with 0.025 M ethylenediaminetetraacetic acid (EDTA) at pH=10... more The dried papyrus plant (DP) treated with 0.025 M ethylenediaminetetraacetic acid (EDTA) at pH=10 was used as effective adsorbent for the removal of Methylene Blue (MB) (cationic azo dye) from aqueous solution. The dried papyrus plant sample characterized by Fourier Transform Infrared (FTIR), and Scanning Electron Microscopy (SEM). The effects of initial dye concentration (5-250 mg/L), pH (2-10), temperature (298-318 K), adsorbent dose (0.005-0.035 g), and contact time were investigated and discussed. The batch adsorption experiments, showed that the maximum adsorption of MB (qe max) at pH=8 was 101.60 mg/g and increased with the increase in temperature from 298 to 318 K. The adsorption of MB onto (DP) reached equilibrium within about 150 min. The adsorption equilibrium is described using Langmuir and Freundlich isotherm models. It can be found that the regression coefficient R 2 obtained from Langmuir model is much higher than that from Freundlich model and the practical adsorption capacity is very close to that calculated from Langmuir isotherm, suggesting that the Langmuir isotherm fits better with the experimental data. The adsorption kinetics followed a pseudo-second order kinetic model and intra particle diffusion was involved in the adsorption process. Thermodynamic results indicated that the adsorption process was spontaneous and endothermic in nature. The proposed adsorbent was successfully applied for the removal of MB from aqueous solution with a percent recovery 81.65 % by using 0.1 N HCl.

Research paper thumbnail of Adsorption of Mercuric Ions from Aqueous Solution using Activated Carbon and Modified Activated Carbon Prepared from Dried Papyrus Plant

Ahmed A. Alibrahimi, 2015

It has prepared several stationary phasesfrom the papyrus plant are of three types.First type: DP... more It has prepared several stationary phasesfrom the papyrus plant are of three types.First type: DP phase of dry papyrus, papyrus plant sockedby 0.036 M (EDTA) ethylene diamine tetra-acetic acid at pH=10. Second type: activated carbon SAC (sulfuric activated carbon) treated by sulfuric acid at ratio 1:3, PAC (phosphoric activated carbon) treated by phosphoric acid at ratio 1:3. Third type: modification activate carbon OSAC (oxidized sulfuric activated carbon) and OPAC (oxidized phosphoric activated carbon) modified by nitric acid at ratio 1:10. The study of effectsfrom different pHvalue (2 – 6), contact time (5 – 180) min, initial concentration (5 – 600) mg/L, temperature (298 – 318) K and adsorbed dosage (0.025 – 0.2) g.The samples characterized using Scanning Electron Microscope (SEM) and Fourier Transform Infrared (FTIR) Spectrophotometry before and after adsorption.suggesting that the Langmuir isotherm fits better with the experimental data ,Langmuir model is much higher than that from Freundlich and the practical adsorption.

Research paper thumbnail of Removal of Cadmium ions By Several Solid Stationary Phases Prepared from Papyrus Plant

Ahmed A. Alibrahimi, 2015

The removal of Cd 2+ ions from aqueous solution, has been done by using stationary phases prepare... more The removal of Cd 2+ ions from aqueous solution, has been done by using stationary phases prepared from papyrus plant. The dried (DP) treated with 0.025 M ethylene diamine tetra-acetic acid (EDTA) at pH=10, The activated carbon samples (SAC and PAC) were treated by chemical activation with sulfuric acid and phosphoric acid. Then activated carbon has been modified by nitric acid and gives the oxidized sulfuric activated carbon (OSAC) and oxidized phosphoric activated carbon (OPAC). Batch adsorption experiments were held at different pH values (2-6), contact time (5-300) min, initial metal concentration (25-300) mg/L, where the adsorbed dosage (25-200) mg, and solution temperature (298-318) K. The oxidized activated carbon, activated carbon and the dried from were seen as Fourier Transform Infrared (FTIR), as well as Scanning Electron Microscopy (SEM). The particular adsorption stability was described using Langmuir as well as Freundlich isotherm designs. The adsorption kinetics followed a pseudo-second get kinetic design and intra particle diffusion was involved in the adsorption procedure. Thermodynamic outcomes indicated how the adsorption procedure was quickly arranged and endothermic within nature.

Research paper thumbnail of Methylene Blue Dye Removal from Aqueous Solution Using Several Solid Stationary Phases Prepared from Papyrus Plant

The activated carbon samples (SC and PC) were prepared from papyrus plant by chemical a... more The activated carbon samples (SC and PC) were prepared from papyrus plant by chemical activation with sulfuric acid and phosphoric acid, respectively. The SC and PC were then modified with nitric acid to give the oxidized sulfuric carbon (OSC) and oxidized phosphoric carbon (OPC) and utilized for removing Methylene Blue (MB) from aqueous solution with initial dye concentration (5 - 650) mg/L and a temperature of 25–45°C. The effects of pH, contact time, initial concentration of MB and temperature on adsorption, as well as the thermodynamics and kinetics were investigated. The experimental results showed that: (1) The adsorption capacity of MB was dependent upon pH and maximum adsorption occurs at pH =8. (2) The adsorption process was in good agreement with the Langmuir adsorption isotherm model. (3) The adsorption kinetics followed a pseudo-second order kinetic model and intra particle diffusion was involved in the adsorption process. (4) Thermodynamic results indicated that the adsorption process was spontaneous and endothermic in nature. The proposed adsorbent was successfully applied for the removal of Methylene Blue (MB) from aqueous solution with a percent recovery of the sample SC 98.9%, PC 98.3%, OSC 97.5%, OPC 95.05% when using 0.1 𝙼 HCL.

Research paper thumbnail of Methylene Blue Dye Removal from Aqueous Solutions and Photocatalytic Activity Using UV/Nano-TiO : Operating Parameters Study

Analytical Chemistry Letters, 2015

The activated carbon samples (SC and PC) were prepared from papyrus plant by chemical activation ... more The activated carbon samples (SC and PC) were prepared from papyrus plant by chemical activation with sulfuric acid and phosphoric acid, respectively. The SC and PC were then modified with nitric acid to give the oxidized sulfuric carbon (OSC) and oxidized phosphoric carbon (OPC) and utilized for removing Methylene Blue (MB) from aqueous solution with initial dye concentration (5-650) mg/L and a temperature of 25-45°C. The effects of pH, contact time, initial concentration of MB and temperature on adsorption, as well as the thermodynamics and kinetics were investigated. The experimental results showed that: (1) The adsorption capacity of MB was dependent upon pH and maximum adsorption occurs at pH 8. (2) The adsorption process was in good agreement with the Langmuir adsorption isotherm model. (3) The adsorption kinetics followed a pseudo-second order kinetic model and intra particle diffusion was involved in the adsorption process. (4) Thermodynamic results indicated that the adsorption process was spontaneous and endothermic in nature. The proposed adsorbent was successfully applied for the removal of Methylene Blue (MB) from aqueous solution with a percent recovery of the sample SC 98.9%, PC 98.3%, OSC 97.5%, OPC 95.05% when using 0.1-1M HCl.

Research paper thumbnail of Taking Advantage of the Rapid Growing Water Hyacinth Plant in the Iraqi Rivers

The ability of natural plants to remove contaminants from water can be exploited to produce water... more The ability of natural plants to remove contaminants from water can be exploited to produce water suitable for human, plant and animal use. The study is based upon the preparation of solid stationary phases of plants that include a high amount of cellulose water hyacinth plant after several treatments and chemical modifications give many static phases which have been prepared from it and helped in the removal of organic pollutants dyes Methylene Blue. Chemo-therapy is done with acid H3PO4. Chemical modifications use oxidizing acids such as HNO3. The tributary groups, that will compensate for the active carbon surface, are diagnosed by FTIR analysis. To identify the shape of the particles and the nature of the carbon surface, the Scanning Electron Microscope SEM should be used. The surface area of the stationary phases molecules has been measured. Several effects on stationary phases of pH solution, concentration and temperature are studied to determine the efficiency of stationary p...

Research paper thumbnail of Removing Metal Ions of Cobalt (II) from Aqueous Solutions By CaO Nanoparticle

Journal of Physics: Conference Series

Colloidal particles of"Calcium0oxide" CaO" nanoparticles0were prepared by the (sol-,gel)method)fr... more Colloidal particles of"Calcium0oxide" CaO" nanoparticles0were prepared by the (sol-,gel)method)from(CaCl2). The study focused on the removal of metal Co(II) from aqueous solutions by adsorption process. Powder CaO was calcination at temperature 500oC. The 9 structural (characteristics) of the synthesized sorbent-were investigated, by-means of (X-ray) analysis "XRD" FTIR spectroscopy, "transmission electron microscope" (TEM), "scanning electron microscope" (SEM) and surface area. The effect of various parameters like as the effect of pH (2, 5, 7, 8 and 10), initial concentration for metal ion Co(II) (50-350 mg/L) and temperature difference (5, 25, 45 and 65) oC. Almost complete removal (99 %) of metal ion Co(II) was obtained within 30 min at an optimum adsorbent dose of 0.05 mg for initial Co(II) concentration of 50 mg/L at pH = 7, room temperature (≈ 25oC) were achieved.

Research paper thumbnail of Solid Phase Extraction and Determination of Cationic Azo Dye from Aqueous Solution Using Dried Papyrus Plant

Ahmed A. Alibrahimi, 2015

The dried papyrus plant (DP) treated with 0.025 M ethylenediaminetetraacetic acid (EDTA) at pH=10... more The dried papyrus plant (DP) treated with 0.025 M ethylenediaminetetraacetic acid (EDTA) at pH=10 was used as effective adsorbent for the removal of Methylene Blue (MB) (cationic azo dye) from aqueous solution. The dried papyrus plant sample characterized by Fourier Transform Infrared (FTIR), and Scanning Electron Microscopy (SEM). The effects of initial dye concentration (5-250 mg/L), pH (2-10), temperature (298-318 K), adsorbent dose (0.005-0.035 g), and contact time were investigated and discussed. The batch adsorption experiments, showed that the maximum adsorption of MB (qe max) at pH=8 was 101.60 mg/g and increased with the increase in temperature from 298 to 318 K. The adsorption of MB onto (DP) reached equilibrium within about 150 min. The adsorption equilibrium is described using Langmuir and Freundlich isotherm models. It can be found that the regression coefficient R 2 obtained from Langmuir model is much higher than that from Freundlich model and the practical adsorption capacity is very close to that calculated from Langmuir isotherm, suggesting that the Langmuir isotherm fits better with the experimental data. The adsorption kinetics followed a pseudo-second order kinetic model and intra particle diffusion was involved in the adsorption process. Thermodynamic results indicated that the adsorption process was spontaneous and endothermic in nature. The proposed adsorbent was successfully applied for the removal of MB from aqueous solution with a percent recovery 81.65 % by using 0.1 N HCl.

Research paper thumbnail of Adsorption of Mercuric Ions from Aqueous Solution using Activated Carbon and Modified Activated Carbon Prepared from Dried Papyrus Plant

Ahmed A. Alibrahimi, 2015

It has prepared several stationary phasesfrom the papyrus plant are of three types.First type: DP... more It has prepared several stationary phasesfrom the papyrus plant are of three types.First type: DP phase of dry papyrus, papyrus plant sockedby 0.036 M (EDTA) ethylene diamine tetra-acetic acid at pH=10. Second type: activated carbon SAC (sulfuric activated carbon) treated by sulfuric acid at ratio 1:3, PAC (phosphoric activated carbon) treated by phosphoric acid at ratio 1:3. Third type: modification activate carbon OSAC (oxidized sulfuric activated carbon) and OPAC (oxidized phosphoric activated carbon) modified by nitric acid at ratio 1:10. The study of effectsfrom different pHvalue (2 – 6), contact time (5 – 180) min, initial concentration (5 – 600) mg/L, temperature (298 – 318) K and adsorbed dosage (0.025 – 0.2) g.The samples characterized using Scanning Electron Microscope (SEM) and Fourier Transform Infrared (FTIR) Spectrophotometry before and after adsorption.suggesting that the Langmuir isotherm fits better with the experimental data ,Langmuir model is much higher than that from Freundlich and the practical adsorption.

Research paper thumbnail of Removal of Cadmium ions By Several Solid Stationary Phases Prepared from Papyrus Plant

Ahmed A. Alibrahimi, 2015

The removal of Cd 2+ ions from aqueous solution, has been done by using stationary phases prepare... more The removal of Cd 2+ ions from aqueous solution, has been done by using stationary phases prepared from papyrus plant. The dried (DP) treated with 0.025 M ethylene diamine tetra-acetic acid (EDTA) at pH=10, The activated carbon samples (SAC and PAC) were treated by chemical activation with sulfuric acid and phosphoric acid. Then activated carbon has been modified by nitric acid and gives the oxidized sulfuric activated carbon (OSAC) and oxidized phosphoric activated carbon (OPAC). Batch adsorption experiments were held at different pH values (2-6), contact time (5-300) min, initial metal concentration (25-300) mg/L, where the adsorbed dosage (25-200) mg, and solution temperature (298-318) K. The oxidized activated carbon, activated carbon and the dried from were seen as Fourier Transform Infrared (FTIR), as well as Scanning Electron Microscopy (SEM). The particular adsorption stability was described using Langmuir as well as Freundlich isotherm designs. The adsorption kinetics followed a pseudo-second get kinetic design and intra particle diffusion was involved in the adsorption procedure. Thermodynamic outcomes indicated how the adsorption procedure was quickly arranged and endothermic within nature.

Research paper thumbnail of Methylene Blue Dye Removal from Aqueous Solution Using Several Solid Stationary Phases Prepared from Papyrus Plant

The activated carbon samples (SC and PC) were prepared from papyrus plant by chemical a... more The activated carbon samples (SC and PC) were prepared from papyrus plant by chemical activation with sulfuric acid and phosphoric acid, respectively. The SC and PC were then modified with nitric acid to give the oxidized sulfuric carbon (OSC) and oxidized phosphoric carbon (OPC) and utilized for removing Methylene Blue (MB) from aqueous solution with initial dye concentration (5 - 650) mg/L and a temperature of 25–45°C. The effects of pH, contact time, initial concentration of MB and temperature on adsorption, as well as the thermodynamics and kinetics were investigated. The experimental results showed that: (1) The adsorption capacity of MB was dependent upon pH and maximum adsorption occurs at pH =8. (2) The adsorption process was in good agreement with the Langmuir adsorption isotherm model. (3) The adsorption kinetics followed a pseudo-second order kinetic model and intra particle diffusion was involved in the adsorption process. (4) Thermodynamic results indicated that the adsorption process was spontaneous and endothermic in nature. The proposed adsorbent was successfully applied for the removal of Methylene Blue (MB) from aqueous solution with a percent recovery of the sample SC 98.9%, PC 98.3%, OSC 97.5%, OPC 95.05% when using 0.1 𝙼 HCL.