Preparation and characterization of biochar-iron oxide-palygorskite composites for uranium(VI) removal from aqueous solutions
This paper details the synthesis of palygorskite/biochar/iron oxide composites and their utilization for the remediation of water solutions contaminated with uranium(VI). The synthesis procedure involved the combination of iron chloride, starch, and palygorskite with subsequent pH adjustment, drying...
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Academy of Sciences of Moldova, Institute of Chemistry
2025-07-01
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| Series: | Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry |
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http://cjm.ichem.md/preparation-and-characterization-of-biochar-iron-oxide-palygorskite-composites-for-uranium
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| author | Ihor Pylypenko Iryna Kovalchuk Mykola Tsyba Yurii Lytvynenko Oleksandr Shyrokov |
| author_facet | Ihor Pylypenko Iryna Kovalchuk Mykola Tsyba Yurii Lytvynenko Oleksandr Shyrokov |
| author_sort | Ihor Pylypenko |
| collection | DOAJ |
| description | This paper details the synthesis of palygorskite/biochar/iron oxide composites and their utilization for the remediation of water solutions contaminated with uranium(VI). The synthesis procedure involved the combination of iron chloride, starch, and palygorskite with subsequent pH adjustment, drying of the formed precipitate, and pyrolysis at 600°C. The synthesis of mesoporous materials, primarily composed of iron oxides, including magnetite and hematite, was confirmed using various characterization techniques, including FTIR, SEM, and XRD. It was shown that the adsorption of uranium(VI) reached a maximum of 100.2 μmol/g, exhibiting the highest affinity, which is associated with significant magnetite involvement, which facilitates the reduction processes of uranium(VI) to uranium(IV). The findings demonstrated that the uranium removal process was enhanced by a rise in pH, with significant adsorption and possible precipitation occurring under neutral conditions, so using these composite materials is suitable for in situ remediation of water solutions contaminated by uranium(VI). |
| format | Article |
| id | doaj-art-4d085223e1c946598dc348c0e764f1fa |
| institution | Kabale University |
| issn | 1857-1727 2345-1688 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Academy of Sciences of Moldova, Institute of Chemistry |
| record_format | Article |
| series | Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry |
| spelling | doaj-art-4d085223e1c946598dc348c0e764f1fa2025-08-20T03:50:32ZengAcademy of Sciences of Moldova, Institute of ChemistryChemistry Journal of Moldova: General, Industrial and Ecological Chemistry1857-17272345-16882025-07-01201697810.19261/cjm.2025.12941294Preparation and characterization of biochar-iron oxide-palygorskite composites for uranium(VI) removal from aqueous solutionsIhor Pylypenko0Iryna Kovalchuk1Mykola Tsyba2Yurii Lytvynenko3Oleksandr Shyrokov4 National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37, Beresteiskyi ave., Kyiv, 03056, Ukraine National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, 37, Beresteiskyi ave., Kyiv, 03056, Ukraine Institute for Sorption and Problems of Endoecology of NAS of Ukraine, 13, Oleha Mudraka str., Kyiv, 03164, Ukraine Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of NAS of Ukraine, 34, Palladina ave., Kyiv, 03142, Ukraine Frantsevich Institute for Problems of Materials Science of NAS of Ukraine, 3, Omelyana Prytsaka str., Kyiv, 03142, Ukraine This paper details the synthesis of palygorskite/biochar/iron oxide composites and their utilization for the remediation of water solutions contaminated with uranium(VI). The synthesis procedure involved the combination of iron chloride, starch, and palygorskite with subsequent pH adjustment, drying of the formed precipitate, and pyrolysis at 600°C. The synthesis of mesoporous materials, primarily composed of iron oxides, including magnetite and hematite, was confirmed using various characterization techniques, including FTIR, SEM, and XRD. It was shown that the adsorption of uranium(VI) reached a maximum of 100.2 μmol/g, exhibiting the highest affinity, which is associated with significant magnetite involvement, which facilitates the reduction processes of uranium(VI) to uranium(IV). The findings demonstrated that the uranium removal process was enhanced by a rise in pH, with significant adsorption and possible precipitation occurring under neutral conditions, so using these composite materials is suitable for in situ remediation of water solutions contaminated by uranium(VI). http://cjm.ichem.md/preparation-and-characterization-of-biochar-iron-oxide-palygorskite-composites-for-uranium biochar compositepalygorskitepyrolysisadsorptionuranium(vi) |
| spellingShingle | Ihor Pylypenko Iryna Kovalchuk Mykola Tsyba Yurii Lytvynenko Oleksandr Shyrokov Preparation and characterization of biochar-iron oxide-palygorskite composites for uranium(VI) removal from aqueous solutions Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry biochar composite palygorskite pyrolysis adsorption uranium(vi) |
| title | Preparation and characterization of biochar-iron oxide-palygorskite composites for uranium(VI) removal from aqueous solutions |
| title_full | Preparation and characterization of biochar-iron oxide-palygorskite composites for uranium(VI) removal from aqueous solutions |
| title_fullStr | Preparation and characterization of biochar-iron oxide-palygorskite composites for uranium(VI) removal from aqueous solutions |
| title_full_unstemmed | Preparation and characterization of biochar-iron oxide-palygorskite composites for uranium(VI) removal from aqueous solutions |
| title_short | Preparation and characterization of biochar-iron oxide-palygorskite composites for uranium(VI) removal from aqueous solutions |
| title_sort | preparation and characterization of biochar iron oxide palygorskite composites for uranium vi removal from aqueous solutions |
| topic | biochar composite palygorskite pyrolysis adsorption uranium(vi) |
| url |
http://cjm.ichem.md/preparation-and-characterization-of-biochar-iron-oxide-palygorskite-composites-for-uranium
|
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