University of Oulu

dos Reis, G.S., Schnorr, C.E., Dotto, G.L. et al. Wood waste-based functionalized natural hydrochar for the effective removal of Ce(III) ions from aqueous solution. Environ Sci Pollut Res 30, 64067–64077 (2023).

Wood waste-based functionalized natural hydrochar for the effective removal of Ce(III) ions from aqueous solution

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Author: dos Reis, Glaydson S.1; Schnorr, Carlos E.2; Dotto, Guilherme L.3,4;
Organizations: 1Department of Forest Biomaterials and Technology, Biomass Technology Centre, Swedish University of Agricultural Sciences, 901 83, Umeå, Sweden
2Universidad De La Costa, Calle 58 # 55–66, 080002, Barranquilla, Atlántico, Colombia
3Research Group On Adsorptive and Catalytic Process Engineering (ENGEPAC), Federal University of Santa Maria, Av. Roraima, 1000-7, Santa Maria, RS, 97105–900, Brazil
4Normandie Université, UNIROUEN, INSA Rouen, CNRS, COBRA (UMR 6014), 27000, Evreux, France
5Institute of Chemistry, Federal University of Rio Grande Do Sul, P.O.15003, Porto Alegre, 91501-970, Brazil
6Research Unit of Sustainable Chemistry, University of Oulu, P.O. Box 3000, 90014, Oulu, Finland
7Unit of Applied Chemistry, University of Jyvaskyla, Kokkola University Consortium Chydenius, Talonpojankatu 2B, 67100, Kokkola, Finland
Format: article
Version: accepted version
Access: embargoed
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Language: English
Published: Springer Nature, 2023
Publish Date: 2024-04-15


In this study, a sustainable and easily prepared hydrochar from wood waste was studied to adsorb and recover the rare earth element cerium (Ce(III)) from an aqueous solution. The results revealed that the hydrochar contains several surface functional groups (e.g., C–O, C = O, OH, COOH), which largely influenced its adsorption capacity. The effect of pH strongly influenced the Ce(III) removal, achieving its maximum removal efficiency at pH 6.0 and very low adsorption capacity under an acidic solution. The hydrochar proved to be highly efficient in Ce(III) adsorption reaching a maximum adsorption capacity of 327.9 mg g−1 at 298 K. The kinetic and equilibrium process were better fitted by the general order and Liu isotherm model, respectively. Possible mechanisms of Ce(III) adsorption on the hydrochar structure could be explained by electrostatic interactions and chelation between surface functional groups and the Ce(III). Furthermore, the hydrochar exhibited an excellent regeneration capacity upon using 1 mol L−1 of sulfuric acid (H₂SO₄) as eluent, and it was reused for three cycles without losing its adsorption performance. This research proposes a sustainable approach for developing an efficient adsorbent with excellent physicochemical and adsorption properties for Ce(III) removal.

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Series: Environmental science and pollution research
ISSN: 0944-1344
ISSN-E: 1614-7499
ISSN-L: 0944-1344
Volume: 30
Issue: 23
Pages: 64067 - 64077
DOI: 10.1007/s11356-023-26921-6
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
Funding: This work was funded by Brazilian National Council for Scientific and Technological Development/CNPq (Grants 405982/2022-4, 303992/2021-2, 303.612/2021-5, and 402.450/2021-3) and Coordination for the Improvement of Higher Education Personnel/ CAPES (CAPES-Print program). Funding support is also provided by Bio4Energy—a Strategic Research Environment appointed by the Swedish government and the Swedish University of Agricultural Sciences.
Copyright information: © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023. This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: