Promising Enhancement in the Removal of Uranium Ions by Surface-Modified Activated Carbons: Kinetic and Equilibrium Studies

Haddad, Djamila; Mellah, A.; Nibou, Djamel; Khemaissia, Sihem

doi:10.1061/(asce)ee.1943-7870.0001349

Cited by 21 publications

(4 citation statements)

References 61 publications

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“…Thus, unavoidable uranium waste is discharged into the natural environment through viable modes, such as power plants, nuclear tests, nuclear power plant accidents, and facilities. , Because uranium toxicity, even at trace level, presents a public health problem, the entrapment of uranium from wastewater is rather important to relieve the damage to humans and the surroundings . Therefore, many research efforts have focused on such remediation techniques . Among the different methods for removing uranium from wastewater, the sorption method has been proven to be the most effective .…”

Section: Introductionmentioning

confidence: 99%

“…2 Therefore, many research efforts have focused on such remediation techniques. 4 Among the different methods for removing uranium from wastewater, the sorption method has been proven to be the most effective. 5 Numerous sorbents have been reported in the literature, for example, graphene oxide, 6−9 metal−organic frameworks (MOFs), 10−16 mesoporous silica nanospheres, 17 polymers, 18,19 magnesium oxide foam, 20 and chitosan.…”

Section: Introductionmentioning

confidence: 99%

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Fast and High Amount of U(VI) Uptake by Functional Magnetic Carbon Nanotubes with Phosphate Group

Liu

Zhao

Yuan

et al. 2018

Ind. Eng. Chem. Res.

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In the present study, PZS-TPP/CNT/Fe 3 O 4 was fabricated by carbon nantubes (CNTs) with polyphosphazene and magnetic particles for application in U(VI) removal. The structure of the synthesized composite was characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), a vibrating sample magnetometer (VSM), and X-ray photoelectron spectroscopy (XPS). Studies of the effects of pH values, U(VI) concentration, contact time, and adsorption temperature including competing ions and reusability to the uranium adsorption were conducted. The calculated q max from the Langmuir model was 606.06 mg/g. The possible mechanism was investigated by XPS about the uranium-adsorbed PZS-TPP/CNT/ Fe 3 O 4 , which revealed that the adsorption capacity was mainly due to the coordination ability of phosphoryl groups and nitrogen atoms in the polyphosphazene skeleton. This new material is promising for separation and safe disposal of radionuclides in water.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fast and High Amount of U(VI) Uptake by Functional Magnetic Carbon Nanotubes with Phosphate Group

Liu

Zhao

Yuan

et al. 2018

Ind. Eng. Chem. Res.

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“…On comparing the R 2 values of correlation coefficient, it is seen that Langmuir model has better performance than Freundlich model for representing the equilibrium data. Separation factor RL, a non-dimensional parameter of Langmuir isotherm, (RL = 1/(1 + bCo)), showed that the Chromium (VI) adsorption on Tulsion A-62 was favorable because of (0 < RL=0.99 < 1) [24].…”

Section: Analysis Of Adsorption Isotherm Modelsmentioning

confidence: 99%

Removal of Chromium(VI) from Aqueous Solution using a Strong base Anion Exchange Resin : Kinetic and Equilibrium Studies

Revankar

Koujalagi

Gurjar

et al. 2021

Preprint

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The removal of chromium (VI) from aqueous solution using the strong base anion exchange resin Tulsion A-62 (MP) is reported in this study under a variety of experimental conditions, including initial chromium (VI) concentration, contact time, and medium pH. The ion-exchange process for the resin Tulsion A-62 (MP) was relatively simple and after 300 minutes of phase contact, the equilibrium was achieved. The sorption process, which is pH based, extracted the most chromium (VI) when the pH was between 4.0 and 5.0. Both Langmuir and Freundlich adsorption isotherms were used to fit the equilibrium results for Cr(VI) adsorption, however Langmuir isotherm model was found to be more acceptable for the Cr(VI) adsorption and maximum adsorption capacity of Cr(VI) was found to be 201.6 mg/g. Scanning Electron Microscopy with EDX and Fourier transformed infrared spectroscopy were also used to characterize Tulsion A-62 (MP) before and after chromium adsorption. The adsorption mechanism followed reversible first-order kinetics. The findings showed that such anion-exchange resins can be used to effectively extract chromium (VI) ions from water and wastewater.

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“…Adsorption, chemical precipitation, coagulation/flocculation, ultrafiltration and reverse osmosis are common processes used for removing U from wastewaters [7]. Adsorption of U(VI) onto insoluble adsorbents, such as clay minerals, activated carbon, biochar and natural biopolymers, has been investigated [8,9,10,11,12]. Humic acid (HA) is an inexpensive biopolymer with abundant functional groups (carboxylic and phenolic-hydroxyl), and it has been utilized to adsorb heavy metal ions [13].…”

Section: Introductionmentioning

confidence: 99%

Kinetics and Thermodynamics of Uranium (VI) Adsorption onto Humic Acid Derived from Leonardite

Meng

Yuan

Larson

et al. 2019

IJERPH

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Humic acid (HA) is well known as an inexpensive and effective adsorbent for heavy metal ions. However, the thermodynamics of uranium (U) adsorption onto HA is not fully understood. This study aimed to understand the kinetics and isotherms of U(VI) adsorption onto HA under different temperatures from acidic water. A leonardite-derived HA was characterized for its ash content, elemental compositions, and acidic functional groups, and used for the removal of U (VI) from acidic aqueous solutions via batch experiments at initial concentrations of 0–100 mg·L−1 at 298, 308 and 318 K. ICP-MS was used to determine the U(VI) concentrations in solutions before and after reacting with the HA. The rate and capacity of HA adsorbing U(VI) increased with the temperature. Adsorption kinetic data was best fitted to the pseudo second-order model. This, together with FTIR spectra, indicated a chemisorption of U(VI) by HA. Equilibrium adsorption data was best fitted to the Langmuir and Temkin models. Thermodynamic parameters such as equilibrium constant (K0), standard Gibbs free energy (ΔG0), standard enthalpy change (ΔH0), and standard entropy change (ΔS0), indicated that U(VI) adsorption onto HA was endothermic and spontaneous. The co-existence of cations (Cu2+, Co2+, Cd2+ and Pb2+) and anions (HPO42− and SO42−) reduced U(VI) adsorption. The high propensity and capacity of leonardite-derived HA adsorbing U(VI) suggests that it has the potential for cost-effective removal of U(VI) from acidic contaminated waters.

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Promising Enhancement in the Removal of Uranium Ions by Surface-Modified Activated Carbons: Kinetic and Equilibrium Studies

Cited by 21 publications

References 61 publications

Fast and High Amount of U(VI) Uptake by Functional Magnetic Carbon Nanotubes with Phosphate Group

Fast and High Amount of U(VI) Uptake by Functional Magnetic Carbon Nanotubes with Phosphate Group

Removal of Chromium(VI) from Aqueous Solution using a Strong base Anion Exchange Resin : Kinetic and Equilibrium Studies

Kinetics and Thermodynamics of Uranium (VI) Adsorption onto Humic Acid Derived from Leonardite

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