Dissolution and Retention Process of CeO2 Nanoparticles in Soil with Dynamic Redox Conditions
The time-course association of soil physicochemical properties and fate of CeO2 nanoparticles (NPs) is not well understood. This study for the first time investigated the dissolution and retention of CeO2 NPs (<25 nm) during soil short-term (6 h) and long-term (30 d) aging processes with dynamic redox conditions. Under the additional reductant-induced initial reductive condition, theoretically, up to 220‰ of Ce(IV) was temporarily reductively dissolved within 10 min, accompanied by a slow retention process (180 min) of Ce species in soil solutions. Conversely, the dissolution and slow retention of Ce species were not significant in soil solutions without added reductant. X-ray absorption near edge spectroscopy (XANES) shows that most of Ce species were present as Ce(IV) (94.0%-97.8%) in all soils after a long-term aging process. These results indicate that the soil dynamic redox conditions induced by oxidant/reductant intrinsically determined the different time-course dissolution and retention of CeO2 NPs, highlighting the occasional reductive condition in soil solution that may contribute to the migration and diffusion of Ce species. The time-course study should be also adopted to develop a comprehensive understanding of the nano-soil interactions.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:55 |
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| Enthalten in: |
Environmental science & technology - 55(2021), 21 vom: 02. Nov., Seite 14649-14657 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Jiao, Chunlei [VerfasserIn] |
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| Links: |
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| Themen: |
30K4522N6T |
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| Anmerkungen: |
Date Completed 10.11.2021 Date Revised 10.11.2021 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1021/acs.est.1c04660 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM331926253 |
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| 100 | 1 | |a Jiao, Chunlei |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Dissolution and Retention Process of CeO2 Nanoparticles in Soil with Dynamic Redox Conditions |
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| 500 | |a Date Revised 10.11.2021 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a The time-course association of soil physicochemical properties and fate of CeO2 nanoparticles (NPs) is not well understood. This study for the first time investigated the dissolution and retention of CeO2 NPs (<25 nm) during soil short-term (6 h) and long-term (30 d) aging processes with dynamic redox conditions. Under the additional reductant-induced initial reductive condition, theoretically, up to 220‰ of Ce(IV) was temporarily reductively dissolved within 10 min, accompanied by a slow retention process (180 min) of Ce species in soil solutions. Conversely, the dissolution and slow retention of Ce species were not significant in soil solutions without added reductant. X-ray absorption near edge spectroscopy (XANES) shows that most of Ce species were present as Ce(IV) (94.0%-97.8%) in all soils after a long-term aging process. These results indicate that the soil dynamic redox conditions induced by oxidant/reductant intrinsically determined the different time-course dissolution and retention of CeO2 NPs, highlighting the occasional reductive condition in soil solution that may contribute to the migration and diffusion of Ce species. The time-course study should be also adopted to develop a comprehensive understanding of the nano-soil interactions | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a nanoparticles | |
| 650 | 4 | |a oxidation reduction potential | |
| 650 | 4 | |a reductive dissolution | |
| 650 | 4 | |a reductive substance | |
| 650 | 4 | |a retention | |
| 650 | 4 | |a soil redox condition | |
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| 700 | 1 | |a Dong, Chaonan |e verfasserin |4 aut | |
| 700 | 1 | |a Xie, Changjian |e verfasserin |4 aut | |
| 700 | 1 | |a Luo, Wenhe |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Junzhe |e verfasserin |4 aut | |
| 700 | 1 | |a Fan, Shixian |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Yabo |e verfasserin |4 aut | |
| 700 | 1 | |a Ma, Yuhui |e verfasserin |4 aut | |
| 700 | 1 | |a He, Xiao |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Zhiyong |e verfasserin |4 aut | |
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