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Light Promotes the Immobilization of U(VI) by Ferrihydrite
The environmental behaviors of uranium closely depend on its interaction with natural minerals. Ferrihydrite widely distributed in nature is considered as one main natural media that is able to change the geochemical behaviors of various elements. However, the semiconductor properties of ferrihydrit...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8950992/ https://www.ncbi.nlm.nih.gov/pubmed/35335223 http://dx.doi.org/10.3390/molecules27061859 |
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author | Wang, Yun Wang, Jingjing Ding, Zhe Wang, Wei Song, Jiayu Li, Ping Liang, Jianjun Fan, Qiaohui |
author_facet | Wang, Yun Wang, Jingjing Ding, Zhe Wang, Wei Song, Jiayu Li, Ping Liang, Jianjun Fan, Qiaohui |
author_sort | Wang, Yun |
collection | PubMed |
description | The environmental behaviors of uranium closely depend on its interaction with natural minerals. Ferrihydrite widely distributed in nature is considered as one main natural media that is able to change the geochemical behaviors of various elements. However, the semiconductor properties of ferrihydrite and its impacts on the environmental fate of elements are sometimes ignored. The present study systematically clarified the photocatalysis of U(VI) on ferrihydrite under anaerobic and aerobic conditions, respectively. Ferrihydrite showed excellent photoelectric response. Under anaerobic conditions, U(VI) was converted to U(IV) by light-irradiated ferrihydrite, in the form of UO(2+x) (x < 0.25), where •O(2)(−) was the dominant reactive reductive species. At pH 5.0, ~50% of U(VI) was removed after light irradiation for 2 h, while 100% U(VI) was eliminated at pH 6.0. The presence of methanol accelerated the reduction of U(VI). Under aerobic conditions, the light illumination on ferrihydrite also led to an obvious but slower removal of U(VI). The removal of U(VI) increased from ~25% to 70% as the pH increased from 5.0 to 6.0. The generation of H(2)O(2) under aerobic conditions led to the formation of UO(4)•xH(2)O precipitates on ferrihydrite. Therefore, it is proved that light irradiation on ferrihydrite significantly changed the species of U(VI) and promoted the removal of uranium both under anaerobic and aerobic conditions. |
format | Online Article Text |
id | pubmed-8950992 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-89509922022-03-26 Light Promotes the Immobilization of U(VI) by Ferrihydrite Wang, Yun Wang, Jingjing Ding, Zhe Wang, Wei Song, Jiayu Li, Ping Liang, Jianjun Fan, Qiaohui Molecules Article The environmental behaviors of uranium closely depend on its interaction with natural minerals. Ferrihydrite widely distributed in nature is considered as one main natural media that is able to change the geochemical behaviors of various elements. However, the semiconductor properties of ferrihydrite and its impacts on the environmental fate of elements are sometimes ignored. The present study systematically clarified the photocatalysis of U(VI) on ferrihydrite under anaerobic and aerobic conditions, respectively. Ferrihydrite showed excellent photoelectric response. Under anaerobic conditions, U(VI) was converted to U(IV) by light-irradiated ferrihydrite, in the form of UO(2+x) (x < 0.25), where •O(2)(−) was the dominant reactive reductive species. At pH 5.0, ~50% of U(VI) was removed after light irradiation for 2 h, while 100% U(VI) was eliminated at pH 6.0. The presence of methanol accelerated the reduction of U(VI). Under aerobic conditions, the light illumination on ferrihydrite also led to an obvious but slower removal of U(VI). The removal of U(VI) increased from ~25% to 70% as the pH increased from 5.0 to 6.0. The generation of H(2)O(2) under aerobic conditions led to the formation of UO(4)•xH(2)O precipitates on ferrihydrite. Therefore, it is proved that light irradiation on ferrihydrite significantly changed the species of U(VI) and promoted the removal of uranium both under anaerobic and aerobic conditions. MDPI 2022-03-13 /pmc/articles/PMC8950992/ /pubmed/35335223 http://dx.doi.org/10.3390/molecules27061859 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Wang, Yun Wang, Jingjing Ding, Zhe Wang, Wei Song, Jiayu Li, Ping Liang, Jianjun Fan, Qiaohui Light Promotes the Immobilization of U(VI) by Ferrihydrite |
title | Light Promotes the Immobilization of U(VI) by Ferrihydrite |
title_full | Light Promotes the Immobilization of U(VI) by Ferrihydrite |
title_fullStr | Light Promotes the Immobilization of U(VI) by Ferrihydrite |
title_full_unstemmed | Light Promotes the Immobilization of U(VI) by Ferrihydrite |
title_short | Light Promotes the Immobilization of U(VI) by Ferrihydrite |
title_sort | light promotes the immobilization of u(vi) by ferrihydrite |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8950992/ https://www.ncbi.nlm.nih.gov/pubmed/35335223 http://dx.doi.org/10.3390/molecules27061859 |
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