Hanaa Abu Khoziem - Academia.edu (original) (raw)

Papers by Hanaa Abu Khoziem

Separation Science and Technology, Nov 27, 2017

ABSTRACT An innovative procedure for the selective recovery of lanthanides using (NH4)2SO4 from h... more ABSTRACT An innovative procedure for the selective recovery of lanthanides using (NH4)2SO4 from hydrous oxide cake produced after the alkali breakdown of monazite mineral concentrate was proposed. By applying this procedure, 94.6% of the rare earth elements (REEs) content would be dissolved. In this context, partial precipitation of light rare earth elements (LREEs) as their double sulfate took place. To separate uranium completely from thorium and the remaining REEs (5.4%) from hydrous oxide cake, an alkaline leaching procedure has been carried out by using a mixture of 1/3 (Na2CO3/NaHCO3) solution. Finally, the remaining hydrous oxide cake was then dissolved in 4M HCl to separate either Th or REEs contents.

Radiation Physics and Chemistry

Journal of Water Process Engineering

Journal of Material Cycles and Waste Management

The primary goal of this work is to develop a technology that allows for the recovery of metal va... more The primary goal of this work is to develop a technology that allows for the recovery of metal values from waste products, thereby promoting the wise and efficient use of our nation's resources. To achieve this goal, an industrial waste of El Kriymat boiler fly Ash was used for recovering its content of vanadium, nickel and zinc. About 97, 95 and 99% respectively of these economic elements were first dissolved from boiler fly ash magnetic concentrate (after physical concentration). Leaching experiments using optimum conditions include: 180 g/L sulfuric acid concentration and 4% solid/solid proportion manganese dioxide acts as an oxidant at 80 °C. The recovery of vanadium (V) metal ions was carried out using 3% Alamine 336 in kerosene at an equilibrium pH value of 0.9. Subsequently, 15% sodium sulfide solution was used for co-precipitation of nickel and zinc metal ions in the raffinate solution at pH value of 3.5. Graphical Abstract

Radiochemistry, 2021

Hydrometallurgical processing of micaceous bands concentrate for recovering U and Th using sulfur... more Hydrometallurgical processing of micaceous bands concentrate for recovering U and Th using sulfuric acid agitation leaching was studied. This concentrate assays 4.1% ZrO2, 3.8% Nb2O5, 1.2% RE2O3, 2.8% ThO2, and 0.55% U3O8. The corresponding minerals of these elements include zircon, ferrocolumbite, fergusonite, uranothorite, autunite, and uranophane. About 96% of Th and 94% of U were dissolved under optimum leaching conditions: 30% H2SO4, 1/3 S/L ratio, 4 h leaching time, and 85°C leaching temperature. Di(2-ethylhexyl) hydrogen phosphate (HDEHP) in kerosene was used for U extraction with 90.9% efficiency and its separation from Th in the presence of 0.3 M EDTA solution. Th was then selectively precipitated from the raffinate solution as Th peroxide.

International Journal of Environmental Analytical Chemistry, 2021

Radiochemistry, 2020

Urea CO(NH 2) 2 is an eff ective selective lixiviant for uranium from phosphate raw material. Exp... more Urea CO(NH 2) 2 is an eff ective selective lixiviant for uranium from phosphate raw material. Experiments were performed to determine the factors of uranium dissolution from El-Sebaiya phosphate ore. Under the optimized conditions, uranium is extracted almost completely without signifi cant changes in the chemical composition of the phosphate ore. From the latter, highly pure uranium-free phosphoric acid can be prepared. Analysis of the kinetic data using shrinking core models shows that the uranium leaching from El-Sebaiya phosphate ore with urea is a process controlled by chemical reaction.

International Journal of Mineral Processing, 2014

ABSTRACT The present work aims to study the link between mineralogy and process characteristics o... more ABSTRACT The present work aims to study the link between mineralogy and process characteristics of North Ras Mohamed ore materials. The chemical nature of the latter was also studied to determine the type of treatment employed from one hand and the preferred lixiviate option from the other hand. For this purpose, three technological samples representing three different deposit types were examined for their potential processing options. These include basal sandstone, aplite dyke and pegmatitic bodies which were found to assay 0.05, 0.04 and 0.06% U, 0.13, 0.10 and 0.07% Th and 0.14, 0.13 and 0.09% REEs respectively, while Nb assays 1.3% and Ta 0.5%, in the pegmatitic ore sample. The corresponding minerals of these elements of interest include thorite and uranothorite in the basal sandstone ore material. On the other hand, the multiple-oxide minerals samarsIdte, fergusonite and allanite are found in both the aplite and the pegmatite bodies. However, the zircon, fluorite, apatite, titanite and brookite are considered as the main accessory minerals in the three study ore materials Based on the available chemical and mineralogical data on the three different ore material types of Ras Mohamed area, a physical upgrading process would be required as a major recommendation for future prolific metallurgical work

International Journal of Environmental Analytical Chemistry, 2020

The present work is concerned with the recovery of Cu and REEs from the processed Alloga carbonac... more The present work is concerned with the recovery of Cu and REEs from the processed Alloga carbonaceous shale (almost free from U) of Abu Zeneima area at Southwestern Sinai using H 2 SO 4 acid agitation leaching method. The working processed sample assays 0.18% Cu and 0.068% REEs. The applied optimum leaching conditions realized dissolution efficiencies of 91.2% for Cu and 99.1% for REEs. For selective separation of Cu, LIX973N diluted in kerosene was used. Cu was regenerated from the loaded organic phase under the optimum stripping conditions of 12% H 2 SO 4 acid with shaking time of 3 min at A/O ratio of 1/1 and then precipitated directly as Cu (OH) 2. With respect to REEs extraction, the raffinate solution left behind after Cu recovery and assayed 0.16 g/L of REEs was subjected to Dowex50 W-X8 cation-exchange resin in its hydrogen form realizing loading efficiency of 79.5%. About 99% of eluted REEs was precipitated by the addition of 10% oxalic acid at pH of 1.1. A flowsheet for the preparation of CuO and RE 2 O 3 was proposed.

A hubnerite (MnWO4) mineral concentrate was prepared from the mineralized quartz veins of Gabal Q... more A hubnerite (MnWO4) mineral concentrate was prepared from the mineralized quartz veins of Gabal Qash Amir muscovite granite. This Wconcentrate was chemically processed to obtain the more economic highly pure tungsten oxide. To accomplish this goal, two successive atmospheric agitation leaching processes were conducted. The first includes HCl acid agitation leaching to breakdown hubnerite mineral structure. The purpose was also to get rid of the associated Mn and Fe contents from one hand, and to prepare the more important intermediate tungstic acid from the other hand. From the latter, a sodium tungstate (Na2HWO4) leach liquor was adequately prepared after applying the second atmospheric NaOH agitation leeching process using the optimum conditions of 40% caustic soda concentration at solid/ liquid ratio of 1/3, 180oC for 2h. Finally, 7% Alamine 336 in kerosene was used for extracting 93.7% of W content under the studied optimum conditions of O/A ratio of 1/1, contact time 7 min at r...

Toxics

The development of new materials based on biopolymers (as renewable resources) is substantial for... more The development of new materials based on biopolymers (as renewable resources) is substantial for environmental challenges in the heavy metal and radionuclide ions removal contaminations. Functionalization of chitosan with sulfonic groups was achieved for improving the uranium sorption, not only from slightly acidic leachate, but also for the underground water. The prepared hydrogel based on chitosan was characterized by series of analysis tools for structure elucidation as FTIR spectroscopy, textural properties using nitrogen adsorption method, pHPZC (by pH-drift method), thermogravimetric analysis (TGA), SEM, and SEM-EDX analyses. The sorption was performed toward uranium (VI) ions for adjustment of sorption performances. The optimum sorption was performed at pH 4 (prior to the precipitation pH). The total sorption was achieved within 25 min (relatively fast kinetics) and was fitted by pseudo-first order rate equation (PFORE) and resistance to intraparticle diffusion equation (RID...

Separation and Purification Technology, 2022

An economically important rare-metal mineralization is recorded in the mineralized pegmatite inje... more An economically important rare-metal mineralization is recorded in the mineralized pegmatite injected in alkali-feldspar microgranite of Gabal Samma at North Ras Mohammed granitic pluton, Southern Sinai, Egypt. The studied mineralization was found as distinguishable megascopic crystals scattered within the pegmatitic bodies of Gabal Samma granite and reach up to tens of centimeters. The mineralogy and geochemistry of the studied rare metal mineralization were determined using microscopic examination and X-ray Diffraction (XRD) as well as scanning electron microscope (SEM). These minerals include a unique occurrence of colored ishikawaite (uranium-rich samarskite) together with fergusonite-Y, allanite, titanite, zircon-thorite association, uranothorite and fluorite. The obtained SEM data for the studied minerals are showing the compositional limits of these minerals as specified in the literature. The occurrence of colored ishikawaite varieties (light brown, reddish dark brown and da...

Journal of Radioanalytical and Nuclear Chemistry

Physicochemical Problems of Mineral Processing, 2021

An economically important rare-metal mineralization is recorded in the mineralized pegmatite inje... more An economically important rare-metal mineralization is recorded in the mineralized pegmatite injected in alkali-feldspar microgranite of Gabal Samma at North Ras Mohammed granitic pluton, Southern Sinai, Egypt. The studied mineralization was found as distinguishable megascopic crystals scattered within the pegmatitic bodies of Gabal Samma granite and reach up to tens of centimeters. The mineralogy and geochemistry of the studied rare metal mineralization were determined using microscopic examination and X-ray Diffraction (XRD) as well as scanning electron microscope (SEM). These minerals include a unique occurrence of colored ishikawaite (uraniumrich samarskite) together with fergusonite-Y, allanite, titanite, zircon-thorite association, uranothorite and fluorite. The obtained SEM data for the studied minerals are showing the compositional limits of these minerals as specified in the literature. The occurrence of colored ishikawaite varieties (light brown, reddish dark brown and dar...

Kaolinitization, ferrugination, silicification, and illitization hematitization are the main alte... more Kaolinitization, ferrugination, silicification, and illitization hematitization are the main alteration types recorded in the Gabal (G.) El Sela area, South Eastern Desert, Egypt. These altration zones occur in successive manar as supergene events along faults plane causing mineral redistribution. Uranium mineralization observed in the northern part of Gabal El Sela is mainly controlled by complicated structure regime: faulting, infrastructures, and shearing. So, the northern part of Gabal El Sela area is considered as the most significant and U-fertile part in the studied area. Visible secondary uranium minerals (uranophane and autunite) have been identified and are found to be related mainly to kaolinitized and ferruginated altered samples. Also, pyrite and chalcopyrite can be recorded as reduced Fe bearing minerals in fewer amounts than in hematite and goethite minerals. Finally, the present work confirms that G. El Sela granite is considered as one of the most promising granite ...

Physicochemical Problems of Mineral Processing

Journal of Environmental Chemical Engineering

Separation Science and Technology, Nov 27, 2017

ABSTRACT An innovative procedure for the selective recovery of lanthanides using (NH4)2SO4 from h... more ABSTRACT An innovative procedure for the selective recovery of lanthanides using (NH4)2SO4 from hydrous oxide cake produced after the alkali breakdown of monazite mineral concentrate was proposed. By applying this procedure, 94.6% of the rare earth elements (REEs) content would be dissolved. In this context, partial precipitation of light rare earth elements (LREEs) as their double sulfate took place. To separate uranium completely from thorium and the remaining REEs (5.4%) from hydrous oxide cake, an alkaline leaching procedure has been carried out by using a mixture of 1/3 (Na2CO3/NaHCO3) solution. Finally, the remaining hydrous oxide cake was then dissolved in 4M HCl to separate either Th or REEs contents.

Radiation Physics and Chemistry

Journal of Water Process Engineering

Journal of Material Cycles and Waste Management

The primary goal of this work is to develop a technology that allows for the recovery of metal va... more The primary goal of this work is to develop a technology that allows for the recovery of metal values from waste products, thereby promoting the wise and efficient use of our nation's resources. To achieve this goal, an industrial waste of El Kriymat boiler fly Ash was used for recovering its content of vanadium, nickel and zinc. About 97, 95 and 99% respectively of these economic elements were first dissolved from boiler fly ash magnetic concentrate (after physical concentration). Leaching experiments using optimum conditions include: 180 g/L sulfuric acid concentration and 4% solid/solid proportion manganese dioxide acts as an oxidant at 80 °C. The recovery of vanadium (V) metal ions was carried out using 3% Alamine 336 in kerosene at an equilibrium pH value of 0.9. Subsequently, 15% sodium sulfide solution was used for co-precipitation of nickel and zinc metal ions in the raffinate solution at pH value of 3.5. Graphical Abstract

Radiochemistry, 2021

Hydrometallurgical processing of micaceous bands concentrate for recovering U and Th using sulfur... more Hydrometallurgical processing of micaceous bands concentrate for recovering U and Th using sulfuric acid agitation leaching was studied. This concentrate assays 4.1% ZrO2, 3.8% Nb2O5, 1.2% RE2O3, 2.8% ThO2, and 0.55% U3O8. The corresponding minerals of these elements include zircon, ferrocolumbite, fergusonite, uranothorite, autunite, and uranophane. About 96% of Th and 94% of U were dissolved under optimum leaching conditions: 30% H2SO4, 1/3 S/L ratio, 4 h leaching time, and 85°C leaching temperature. Di(2-ethylhexyl) hydrogen phosphate (HDEHP) in kerosene was used for U extraction with 90.9% efficiency and its separation from Th in the presence of 0.3 M EDTA solution. Th was then selectively precipitated from the raffinate solution as Th peroxide.

International Journal of Environmental Analytical Chemistry, 2021

Radiochemistry, 2020

Urea CO(NH 2) 2 is an eff ective selective lixiviant for uranium from phosphate raw material. Exp... more Urea CO(NH 2) 2 is an eff ective selective lixiviant for uranium from phosphate raw material. Experiments were performed to determine the factors of uranium dissolution from El-Sebaiya phosphate ore. Under the optimized conditions, uranium is extracted almost completely without signifi cant changes in the chemical composition of the phosphate ore. From the latter, highly pure uranium-free phosphoric acid can be prepared. Analysis of the kinetic data using shrinking core models shows that the uranium leaching from El-Sebaiya phosphate ore with urea is a process controlled by chemical reaction.

International Journal of Mineral Processing, 2014

ABSTRACT The present work aims to study the link between mineralogy and process characteristics o... more ABSTRACT The present work aims to study the link between mineralogy and process characteristics of North Ras Mohamed ore materials. The chemical nature of the latter was also studied to determine the type of treatment employed from one hand and the preferred lixiviate option from the other hand. For this purpose, three technological samples representing three different deposit types were examined for their potential processing options. These include basal sandstone, aplite dyke and pegmatitic bodies which were found to assay 0.05, 0.04 and 0.06% U, 0.13, 0.10 and 0.07% Th and 0.14, 0.13 and 0.09% REEs respectively, while Nb assays 1.3% and Ta 0.5%, in the pegmatitic ore sample. The corresponding minerals of these elements of interest include thorite and uranothorite in the basal sandstone ore material. On the other hand, the multiple-oxide minerals samarsIdte, fergusonite and allanite are found in both the aplite and the pegmatite bodies. However, the zircon, fluorite, apatite, titanite and brookite are considered as the main accessory minerals in the three study ore materials Based on the available chemical and mineralogical data on the three different ore material types of Ras Mohamed area, a physical upgrading process would be required as a major recommendation for future prolific metallurgical work

International Journal of Environmental Analytical Chemistry, 2020

The present work is concerned with the recovery of Cu and REEs from the processed Alloga carbonac... more The present work is concerned with the recovery of Cu and REEs from the processed Alloga carbonaceous shale (almost free from U) of Abu Zeneima area at Southwestern Sinai using H 2 SO 4 acid agitation leaching method. The working processed sample assays 0.18% Cu and 0.068% REEs. The applied optimum leaching conditions realized dissolution efficiencies of 91.2% for Cu and 99.1% for REEs. For selective separation of Cu, LIX973N diluted in kerosene was used. Cu was regenerated from the loaded organic phase under the optimum stripping conditions of 12% H 2 SO 4 acid with shaking time of 3 min at A/O ratio of 1/1 and then precipitated directly as Cu (OH) 2. With respect to REEs extraction, the raffinate solution left behind after Cu recovery and assayed 0.16 g/L of REEs was subjected to Dowex50 W-X8 cation-exchange resin in its hydrogen form realizing loading efficiency of 79.5%. About 99% of eluted REEs was precipitated by the addition of 10% oxalic acid at pH of 1.1. A flowsheet for the preparation of CuO and RE 2 O 3 was proposed.

A hubnerite (MnWO4) mineral concentrate was prepared from the mineralized quartz veins of Gabal Q... more A hubnerite (MnWO4) mineral concentrate was prepared from the mineralized quartz veins of Gabal Qash Amir muscovite granite. This Wconcentrate was chemically processed to obtain the more economic highly pure tungsten oxide. To accomplish this goal, two successive atmospheric agitation leaching processes were conducted. The first includes HCl acid agitation leaching to breakdown hubnerite mineral structure. The purpose was also to get rid of the associated Mn and Fe contents from one hand, and to prepare the more important intermediate tungstic acid from the other hand. From the latter, a sodium tungstate (Na2HWO4) leach liquor was adequately prepared after applying the second atmospheric NaOH agitation leeching process using the optimum conditions of 40% caustic soda concentration at solid/ liquid ratio of 1/3, 180oC for 2h. Finally, 7% Alamine 336 in kerosene was used for extracting 93.7% of W content under the studied optimum conditions of O/A ratio of 1/1, contact time 7 min at r...

Toxics

The development of new materials based on biopolymers (as renewable resources) is substantial for... more The development of new materials based on biopolymers (as renewable resources) is substantial for environmental challenges in the heavy metal and radionuclide ions removal contaminations. Functionalization of chitosan with sulfonic groups was achieved for improving the uranium sorption, not only from slightly acidic leachate, but also for the underground water. The prepared hydrogel based on chitosan was characterized by series of analysis tools for structure elucidation as FTIR spectroscopy, textural properties using nitrogen adsorption method, pHPZC (by pH-drift method), thermogravimetric analysis (TGA), SEM, and SEM-EDX analyses. The sorption was performed toward uranium (VI) ions for adjustment of sorption performances. The optimum sorption was performed at pH 4 (prior to the precipitation pH). The total sorption was achieved within 25 min (relatively fast kinetics) and was fitted by pseudo-first order rate equation (PFORE) and resistance to intraparticle diffusion equation (RID...

Separation and Purification Technology, 2022

An economically important rare-metal mineralization is recorded in the mineralized pegmatite inje... more An economically important rare-metal mineralization is recorded in the mineralized pegmatite injected in alkali-feldspar microgranite of Gabal Samma at North Ras Mohammed granitic pluton, Southern Sinai, Egypt. The studied mineralization was found as distinguishable megascopic crystals scattered within the pegmatitic bodies of Gabal Samma granite and reach up to tens of centimeters. The mineralogy and geochemistry of the studied rare metal mineralization were determined using microscopic examination and X-ray Diffraction (XRD) as well as scanning electron microscope (SEM). These minerals include a unique occurrence of colored ishikawaite (uranium-rich samarskite) together with fergusonite-Y, allanite, titanite, zircon-thorite association, uranothorite and fluorite. The obtained SEM data for the studied minerals are showing the compositional limits of these minerals as specified in the literature. The occurrence of colored ishikawaite varieties (light brown, reddish dark brown and da...

Journal of Radioanalytical and Nuclear Chemistry

Physicochemical Problems of Mineral Processing, 2021

An economically important rare-metal mineralization is recorded in the mineralized pegmatite inje... more An economically important rare-metal mineralization is recorded in the mineralized pegmatite injected in alkali-feldspar microgranite of Gabal Samma at North Ras Mohammed granitic pluton, Southern Sinai, Egypt. The studied mineralization was found as distinguishable megascopic crystals scattered within the pegmatitic bodies of Gabal Samma granite and reach up to tens of centimeters. The mineralogy and geochemistry of the studied rare metal mineralization were determined using microscopic examination and X-ray Diffraction (XRD) as well as scanning electron microscope (SEM). These minerals include a unique occurrence of colored ishikawaite (uraniumrich samarskite) together with fergusonite-Y, allanite, titanite, zircon-thorite association, uranothorite and fluorite. The obtained SEM data for the studied minerals are showing the compositional limits of these minerals as specified in the literature. The occurrence of colored ishikawaite varieties (light brown, reddish dark brown and dar...

Kaolinitization, ferrugination, silicification, and illitization hematitization are the main alte... more Kaolinitization, ferrugination, silicification, and illitization hematitization are the main alteration types recorded in the Gabal (G.) El Sela area, South Eastern Desert, Egypt. These altration zones occur in successive manar as supergene events along faults plane causing mineral redistribution. Uranium mineralization observed in the northern part of Gabal El Sela is mainly controlled by complicated structure regime: faulting, infrastructures, and shearing. So, the northern part of Gabal El Sela area is considered as the most significant and U-fertile part in the studied area. Visible secondary uranium minerals (uranophane and autunite) have been identified and are found to be related mainly to kaolinitized and ferruginated altered samples. Also, pyrite and chalcopyrite can be recorded as reduced Fe bearing minerals in fewer amounts than in hematite and goethite minerals. Finally, the present work confirms that G. El Sela granite is considered as one of the most promising granite ...

Physicochemical Problems of Mineral Processing

Journal of Environmental Chemical Engineering