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Uranium recovery from alkaline leach solutions of low-grade Central Jordan uranium deposits utilizing Lewatit® TP-107.

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Title: Uranium recovery from alkaline leach solutions of low-grade Central Jordan uranium deposits utilizing Lewatit® TP-107.
Authors: Alnaief, Mohammad1,2 (AUTHOR) mohammad.alnaief@gju.edu.jo, Al-Shannag, Mohammad2,3 (AUTHOR), Aljarrah, Mohannad4 (AUTHOR), Nawafleh, Heba4 (AUTHOR), Al-Hamamre, Zayed3 (AUTHOR)
Source: Environmental Science & Pollution Research. Nov2025, Vol. 32 Issue 52, p29660-29674. 15p.
Subject Terms: *Uranium mining, *Ion exchange resins, *Chemical kinetics, *Liquid-liquid extraction, *Ore deposits, *Thermodynamics, *Adsorption (Chemistry)
Geographic Terms: Jordan
Abstract: Intensive exploration efforts have confirmed the presence of uranium as a low-grade surficial deposit in the Central Jordan region. According to the Joint Ore Reserve Committee (JORC) compliance resource estimations, approximately 41,000 tons of U3O8 with an average grade of 137 ppm are located in this region, presenting challenges for effective uranium mining. This study evaluates the use of Lewatit® TP-107 resin for uranium recovery from the pregnant liquor solution produced by the alkaline leach process employed by the Jordan Uranium Mining Company (JUMCO). Uranium adsorption and desorption were examined through batch processes, considering various parameters such as initial pH, contact time, temperature, adsorbent dosage, and initial uranium concentration. The maximum uranium adsorption capacity of Lewatit® TP-107 was found to be approximately 67 mg of U/g of resin at a temperature of 50 °C. Adsorption isotherms were analyzed using both the Langmuir and Freundlich models. Thermodynamic analysis revealed that the Gibbs free energy change (ΔG°) ranged from 27.58 to − 24.05 kJ/mol, the enthalpy change (ΔH°) was 18.03 kJ/mol, and the entropy change (ΔS°) was 141.23 J/mol·K, indicating a spontaneous endothermic adsorption process. Kinetic analysis showed that the adsorption rate followed a pseudo-second-order model, with a squared correlation coefficient (R2) close to unitary. After five consecutive cycles, the resin maintained an efficiency of approximately 85%, similar to its initial performance, when using NaHCO3 as the eluting solution. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 190749016
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Uranium recovery from alkaline leach solutions of low-grade Central Jordan uranium deposits utilizing Lewatit® TP-107.
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  Data: <searchLink fieldCode="AR" term="%22Alnaief%2C+Mohammad%22">Alnaief, Mohammad</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> mohammad.alnaief@gju.edu.jo</i><br /><searchLink fieldCode="AR" term="%22Al-Shannag%2C+Mohammad%22">Al-Shannag, Mohammad</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Aljarrah%2C+Mohannad%22">Aljarrah, Mohannad</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nawafleh%2C+Heba%22">Nawafleh, Heba</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Al-Hamamre%2C+Zayed%22">Al-Hamamre, Zayed</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Environmental+Science+%26+Pollution+Research%22">Environmental Science & Pollution Research</searchLink>. Nov2025, Vol. 32 Issue 52, p29660-29674. 15p.
– Name: Subject
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  Data: *<searchLink fieldCode="DE" term="%22Uranium+mining%22">Uranium mining</searchLink><br />*<searchLink fieldCode="DE" term="%22Ion+exchange+resins%22">Ion exchange resins</searchLink><br />*<searchLink fieldCode="DE" term="%22Chemical+kinetics%22">Chemical kinetics</searchLink><br />*<searchLink fieldCode="DE" term="%22Liquid-liquid+extraction%22">Liquid-liquid extraction</searchLink><br />*<searchLink fieldCode="DE" term="%22Ore+deposits%22">Ore deposits</searchLink><br />*<searchLink fieldCode="DE" term="%22Thermodynamics%22">Thermodynamics</searchLink><br />*<searchLink fieldCode="DE" term="%22Adsorption+%28Chemistry%29%22">Adsorption (Chemistry)</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Jordan%22">Jordan</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Intensive exploration efforts have confirmed the presence of uranium as a low-grade surficial deposit in the Central Jordan region. According to the Joint Ore Reserve Committee (JORC) compliance resource estimations, approximately 41,000 tons of U3O8 with an average grade of 137 ppm are located in this region, presenting challenges for effective uranium mining. This study evaluates the use of Lewatit® TP-107 resin for uranium recovery from the pregnant liquor solution produced by the alkaline leach process employed by the Jordan Uranium Mining Company (JUMCO). Uranium adsorption and desorption were examined through batch processes, considering various parameters such as initial pH, contact time, temperature, adsorbent dosage, and initial uranium concentration. The maximum uranium adsorption capacity of Lewatit® TP-107 was found to be approximately 67 mg of U/g of resin at a temperature of 50 °C. Adsorption isotherms were analyzed using both the Langmuir and Freundlich models. Thermodynamic analysis revealed that the Gibbs free energy change (ΔG°) ranged from 27.58 to − 24.05 kJ/mol, the enthalpy change (ΔH°) was 18.03 kJ/mol, and the entropy change (ΔS°) was 141.23 J/mol·K, indicating a spontaneous endothermic adsorption process. Kinetic analysis showed that the adsorption rate followed a pseudo-second-order model, with a squared correlation coefficient (R2) close to unitary. After five consecutive cycles, the resin maintained an efficiency of approximately 85%, similar to its initial performance, when using NaHCO3 as the eluting solution. [ABSTRACT FROM AUTHOR]
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      – Type: doi
        Value: 10.1007/s11356-025-36550-w
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      – Code: eng
        Text: English
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        PageCount: 15
        StartPage: 29660
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      – SubjectFull: Uranium mining
        Type: general
      – SubjectFull: Ion exchange resins
        Type: general
      – SubjectFull: Chemical kinetics
        Type: general
      – SubjectFull: Liquid-liquid extraction
        Type: general
      – SubjectFull: Ore deposits
        Type: general
      – SubjectFull: Thermodynamics
        Type: general
      – SubjectFull: Adsorption (Chemistry)
        Type: general
      – SubjectFull: Jordan
        Type: general
    Titles:
      – TitleFull: Uranium recovery from alkaline leach solutions of low-grade Central Jordan uranium deposits utilizing Lewatit® TP-107.
        Type: main
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          Name:
            NameFull: Alnaief, Mohammad
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            NameFull: Al-Shannag, Mohammad
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            NameFull: Aljarrah, Mohannad
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            NameFull: Nawafleh, Heba
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            NameFull: Al-Hamamre, Zayed
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            – D: 06
              M: 11
              Text: Nov2025
              Type: published
              Y: 2025
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              Value: 09441344
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              Value: 32
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              Value: 52
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            – TitleFull: Environmental Science & Pollution Research
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