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Nucleotide-grafted coal for high-efficiency removal of uranium: performance, optimisation, and insight into the adsorption mechanism.

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Title: Nucleotide-grafted coal for high-efficiency removal of uranium: performance, optimisation, and insight into the adsorption mechanism.
Authors: Shaida, Mohd Azfar1,2 (AUTHOR) mashaida.co@amu.ac.in, Sen, Amit Kumar3 (AUTHOR), Dutta, Raj Kumar1 (AUTHOR)
Source: Environmental Science & Pollution Research. Jun2025, Vol. 32 Issue 27, p16142-16158. 17p.
Subject Terms: *Adsorption (Chemistry), *Radioactive waste management, *Water purification, *Sorbents, *Chemical engineering, *Physisorption
Abstract: Removal of radioactive waste from aqueous medium using cost-effective material is an utmost priority to manage the radioactive waste toxicity. Here we present a novel approach for uranium removal from aqueous system by chemically modifying low-grade coal (low-carbon and high silicate content) with adenosine 5′-monophosphate (AMP) nucleotide and adsorbent referred here as coal@AMP. Functionalisation of coal was carried out by incorporating amide and phosphate functional groups via oxidation and reduction phenomenon. Chemical make-up and structural morphology of coal@AMP was explored using FT-IR and SEM–EDX analysis. Under the optimised pH 6 and adsorbent dose (10 mg per 100 mL), the coal@AMP exhibited 92.2% removal of uranium from aqueous medium in 300 s, following pseudo-second-order kinetics and Langmuir adsorption isotherm. It corresponded to a maximum adsorption capacity (qmax) of 624.6 mg/g. The fast and efficient adsorption of uranium by coal@AMP is favoured by the strong interaction or chelation of uranium species with the amide and phosphate groups. Coal@AMP exhibited excellent selectivity towards adsorption of uranium against interfering ions, e.g. Cd2⁺, Co2⁺, Cu2⁺, Fe2⁺, Hg2⁺, Pb2⁺, Mn2⁺, Zn2⁺, and Ni2⁺. The thermodynamic studies favour spontaneous and endothermic nature of adsorption. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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An: 186782510
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  Data: Nucleotide-grafted coal for high-efficiency removal of uranium: performance, optimisation, and insight into the adsorption mechanism.
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  Data: <searchLink fieldCode="AR" term="%22Shaida%2C+Mohd+Azfar%22">Shaida, Mohd Azfar</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> mashaida.co@amu.ac.in</i><br /><searchLink fieldCode="AR" term="%22Sen%2C+Amit+Kumar%22">Sen, Amit Kumar</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dutta%2C+Raj+Kumar%22">Dutta, Raj Kumar</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Environmental+Science+%26+Pollution+Research%22">Environmental Science & Pollution Research</searchLink>. Jun2025, Vol. 32 Issue 27, p16142-16158. 17p.
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  Data: *<searchLink fieldCode="DE" term="%22Adsorption+%28Chemistry%29%22">Adsorption (Chemistry)</searchLink><br />*<searchLink fieldCode="DE" term="%22Radioactive+waste+management%22">Radioactive waste management</searchLink><br />*<searchLink fieldCode="DE" term="%22Water+purification%22">Water purification</searchLink><br />*<searchLink fieldCode="DE" term="%22Sorbents%22">Sorbents</searchLink><br />*<searchLink fieldCode="DE" term="%22Chemical+engineering%22">Chemical engineering</searchLink><br />*<searchLink fieldCode="DE" term="%22Physisorption%22">Physisorption</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Removal of radioactive waste from aqueous medium using cost-effective material is an utmost priority to manage the radioactive waste toxicity. Here we present a novel approach for uranium removal from aqueous system by chemically modifying low-grade coal (low-carbon and high silicate content) with adenosine 5′-monophosphate (AMP) nucleotide and adsorbent referred here as coal@AMP. Functionalisation of coal was carried out by incorporating amide and phosphate functional groups via oxidation and reduction phenomenon. Chemical make-up and structural morphology of coal@AMP was explored using FT-IR and SEM–EDX analysis. Under the optimised pH 6 and adsorbent dose (10 mg per 100 mL), the coal@AMP exhibited 92.2% removal of uranium from aqueous medium in 300 s, following pseudo-second-order kinetics and Langmuir adsorption isotherm. It corresponded to a maximum adsorption capacity (qmax) of 624.6 mg/g. The fast and efficient adsorption of uranium by coal@AMP is favoured by the strong interaction or chelation of uranium species with the amide and phosphate groups. Coal@AMP exhibited excellent selectivity towards adsorption of uranium against interfering ions, e.g. Cd2⁺, Co2⁺, Cu2⁺, Fe2⁺, Hg2⁺, Pb2⁺, Mn2⁺, Zn2⁺, and Ni2⁺. The thermodynamic studies favour spontaneous and endothermic nature of adsorption. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1007/s11356-025-36653-4
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      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 17
        StartPage: 16142
    Subjects:
      – SubjectFull: Adsorption (Chemistry)
        Type: general
      – SubjectFull: Radioactive waste management
        Type: general
      – SubjectFull: Water purification
        Type: general
      – SubjectFull: Sorbents
        Type: general
      – SubjectFull: Chemical engineering
        Type: general
      – SubjectFull: Physisorption
        Type: general
    Titles:
      – TitleFull: Nucleotide-grafted coal for high-efficiency removal of uranium: performance, optimisation, and insight into the adsorption mechanism.
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            NameFull: Shaida, Mohd Azfar
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            NameFull: Sen, Amit Kumar
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            NameFull: Dutta, Raj Kumar
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            – D: 06
              M: 06
              Text: Jun2025
              Type: published
              Y: 2025
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              Value: 32
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              Value: 27
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            – TitleFull: Environmental Science & Pollution Research
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