The Removal of Uranium and Thorium from Their Aqueous Solutions by 8-Hydroxyquinoline Immobilized Bentonite

The sorption of uranium and thorium from their aqueous solutions by using 8-hydroxyquinoline modified Na-bentonite (HQ-bentonite) was investigated by the batch technique. Na-bentonite and HQ-bentonite were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microsco...

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Published in:Minerals (Basel) 2019-10, Vol.9 (10), p.626
Main Authors: A. Salah, Bahaa, S. Gaber, Mohamed, T. Kandil, Abdel hakim
Format: Article
Language:English
Subjects:
8-Hydroxyquinoline
Acidity
Adsorbents
Adsorption
adsorption kinetics
Adsorptivity
Aluminum oxide
Aqueous solutions
Bentonite
Cation exchanging
Cations
Chemical composition
Correlation coefficients
Diatomaceous earth
Diatomites
Equilibrium
Exchange capacity
Fourier transforms
Humic acids
Hydroxyquinoline
Illite
Illites
Ion temperature
Ions
Isotherms
langmuir isotherm
Metal concentrations
Metal ions
Metals
Morphology
Nuclear power plants
Organic chemistry
Permeability
Phosphorus pentoxide
Physicochemical processes
Physicochemical properties
Pollutants
Scanning electron microscopy
Silica
Silicon dioxide
Smectites
Sodium
Soil
Soil permeability
Soil pollution
Sorbents
Sorption
Thorium
Uranium
X-ray diffraction
X-ray fluorescence
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description The sorption of uranium and thorium from their aqueous solutions by using 8-hydroxyquinoline modified Na-bentonite (HQ-bentonite) was investigated by the batch technique. Na-bentonite and HQ-bentonite were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier Transform Infrared (FTIR) spectroscopy. Factors that influence the sorption of uranium and thorium onto HQ-bentonite such as solution pH, contact time, initial metal ions concentration, HQ-bentonite mass, and temperature were tested. Sorption experiments were expressed by Freundlich and Langmuir isotherms and the sorption results demonstrated that the sorption of uranium and thorium onto HQ-bentonite correlated better with the Langmuir isotherm than the Freundlich isotherm. Kinetics studies showed that the sorption followed the pseudo-second-order kinetic model. Thermodynamic parameters such as ΔH°, ΔS°, and ΔG° indicated that the sorption of uranium and thorium onto HQ-bentonite was endothermic, feasible, spontaneous, and physical in nature. The maximum adsorption capacities of HQ-bentonite were calculated from the Langmuir isotherm at 303 K and were found to be 63.90 and 65.44 for U(VI) and Th(IV) metal ions, respectively.
doi_str_mv 10.3390/min9100626
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Salah, Bahaa</creatorcontrib><creatorcontrib>S. Gaber, Mohamed</creatorcontrib><creatorcontrib>T. Kandil, Abdel hakim</creatorcontrib><title>The Removal of Uranium and Thorium from Their Aqueous Solutions by 8-Hydroxyquinoline Immobilized Bentonite</title><title>Minerals (Basel)</title><description>The sorption of uranium and thorium from their aqueous solutions by using 8-hydroxyquinoline modified Na-bentonite (HQ-bentonite) was investigated by the batch technique. Na-bentonite and HQ-bentonite were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier Transform Infrared (FTIR) spectroscopy. Factors that influence the sorption of uranium and thorium onto HQ-bentonite such as solution pH, contact time, initial metal ions concentration, HQ-bentonite mass, and temperature were tested. 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The maximum adsorption capacities of HQ-bentonite were calculated from the Langmuir isotherm at 303 K and were found to be 63.90 and 65.44 for U(VI) and Th(IV) metal ions, respectively.</description><subject>8-Hydroxyquinoline</subject><subject>Acidity</subject><subject>Adsorbents</subject><subject>Adsorption</subject><subject>adsorption kinetics</subject><subject>Adsorptivity</subject><subject>Aluminum oxide</subject><subject>Aqueous solutions</subject><subject>Bentonite</subject><subject>Cation exchanging</subject><subject>Cations</subject><subject>Chemical composition</subject><subject>Correlation coefficients</subject><subject>Diatomaceous earth</subject><subject>Diatomites</subject><subject>Equilibrium</subject><subject>Exchange capacity</subject><subject>Fourier transforms</subject><subject>Humic acids</subject><subject>Hydroxyquinoline</subject><subject>Illite</subject><subject>Illites</subject><subject>Ion temperature</subject><subject>Ions</subject><subject>Isotherms</subject><subject>langmuir isotherm</subject><subject>Metal concentrations</subject><subject>Metal ions</subject><subject>Metals</subject><subject>Morphology</subject><subject>Nuclear power plants</subject><subject>Organic chemistry</subject><subject>Permeability</subject><subject>Phosphorus pentoxide</subject><subject>Physicochemical processes</subject><subject>Physicochemical properties</subject><subject>Pollutants</subject><subject>Scanning electron microscopy</subject><subject>Silica</subject><subject>Silicon dioxide</subject><subject>Smectites</subject><subject>Sodium</subject><subject>Soil</subject><subject>Soil permeability</subject><subject>Soil pollution</subject><subject>Sorbents</subject><subject>Sorption</subject><subject>Thorium</subject><subject>Uranium</subject><subject>X-ray diffraction</subject><subject>X-ray fluorescence</subject><issn>2075-163X</issn><issn>2075-163X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>M0C</sourceid><sourceid>PIMPY</sourceid><sourceid>DOA</sourceid><recordid>eNpNUdFKwzAULaLgmHvxCwK-CdWkadrkcQ51g4GgG_gWkjZxmW3ulrbi_Hq7TdT7cs89HM69lxNFlwTfUCrwbe28IBhnSXYSDRKcs5hk9PX0Hz6PRk2zxn0JQjlLBtH7YmXQs6nhQ1UILFoG5V1XI-VLtFhB2GMboO4H4wIabzsDXYNeoOpaB75Beod4PN2VAT532855qJw3aFbXoF3lvkyJ7oxvwbvWXERnVlWNGf30YbR8uF9MpvH86XE2Gc_jgmakjblNyoJpYkRKORXU9KeqlGW6yLXS2BLOSKlNanNuubFaZz3PU8K4FiLVCR1Gs6NvCWotN8HVKuwkKCcPBIQ3qULrisrIImVECFxmhvI0Z5gzrESqLGVKU3rwujp6bQL0vzetXEMXfH--TChJMCGE5r3q-qgqAjRNMPZ3K8Fyn438y4Z-Aze4gbM</recordid><startdate>20191001</startdate><enddate>20191001</enddate><creator>A. 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Salah, Bahaa</au><au>S. Gaber, Mohamed</au><au>T. Kandil, Abdel hakim</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Removal of Uranium and Thorium from Their Aqueous Solutions by 8-Hydroxyquinoline Immobilized Bentonite</atitle><jtitle>Minerals (Basel)</jtitle><date>2019-10-01</date><risdate>2019</risdate><volume>9</volume><issue>10</issue><spage>626</spage><pages>626-</pages><issn>2075-163X</issn><eissn>2075-163X</eissn><abstract>The sorption of uranium and thorium from their aqueous solutions by using 8-hydroxyquinoline modified Na-bentonite (HQ-bentonite) was investigated by the batch technique. Na-bentonite and HQ-bentonite were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier Transform Infrared (FTIR) spectroscopy. Factors that influence the sorption of uranium and thorium onto HQ-bentonite such as solution pH, contact time, initial metal ions concentration, HQ-bentonite mass, and temperature were tested. Sorption experiments were expressed by Freundlich and Langmuir isotherms and the sorption results demonstrated that the sorption of uranium and thorium onto HQ-bentonite correlated better with the Langmuir isotherm than the Freundlich isotherm. Kinetics studies showed that the sorption followed the pseudo-second-order kinetic model. Thermodynamic parameters such as ΔH°, ΔS°, and ΔG° indicated that the sorption of uranium and thorium onto HQ-bentonite was endothermic, feasible, spontaneous, and physical in nature. The maximum adsorption capacities of HQ-bentonite were calculated from the Langmuir isotherm at 303 K and were found to be 63.90 and 65.44 for U(VI) and Th(IV) metal ions, respectively.</abstract><cop>Basel</cop><pub>MDPI AG</pub><doi>10.3390/min9100626</doi><oa>free_for_read</oa></addata></record>
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ispartof Minerals (Basel), 2019-10, Vol.9 (10), p.626
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subjects 8-Hydroxyquinoline
Acidity
Adsorbents
Adsorption
adsorption kinetics
Adsorptivity
Aluminum oxide
Aqueous solutions
Bentonite
Cation exchanging
Cations
Chemical composition
Correlation coefficients
Diatomaceous earth
Diatomites
Equilibrium
Exchange capacity
Fourier transforms
Humic acids
Hydroxyquinoline
Illite
Illites
Ion temperature
Ions
Isotherms
langmuir isotherm
Metal concentrations
Metal ions
Metals
Morphology
Nuclear power plants
Organic chemistry
Permeability
Phosphorus pentoxide
Physicochemical processes
Physicochemical properties
Pollutants
Scanning electron microscopy
Silica
Silicon dioxide
Smectites
Sodium
Soil
Soil permeability
Soil pollution
Sorbents
Sorption
Thorium
Uranium
X-ray diffraction
X-ray fluorescence
title The Removal of Uranium and Thorium from Their Aqueous Solutions by 8-Hydroxyquinoline Immobilized Bentonite
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