Significant contribution of metastable particulate organic matter to natural formation of silver nanoparticles in soils
Particulate organic matter (POM) is distributed worldwide in high abundance. Although insoluble, it could serve as a redox mediator for microbial reductive dehalogenation and mineral transformation. Quantitative information on the role of POM in the natural occurrence of silver nanoparticles (AgNPs)...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Online Access: | https://hdl.handle.net/10356/89747 http://hdl.handle.net/10220/49893 |
| _version_ | 1811693926929661952 |
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| author | Huang, Ying-Nan Qian, Ting-Ting Dang, Fei Yin, Yong-Guang Li, Min Zhou, Dong-Mei |
| author2 | Advanced Environmental Biotechnology Centre |
| author_facet | Advanced Environmental Biotechnology Centre Huang, Ying-Nan Qian, Ting-Ting Dang, Fei Yin, Yong-Guang Li, Min Zhou, Dong-Mei |
| author_sort | Huang, Ying-Nan |
| collection | NTU |
| description | Particulate organic matter (POM) is distributed worldwide in high abundance. Although insoluble, it could serve as a redox mediator for microbial reductive dehalogenation and mineral transformation. Quantitative information on the role of POM in the natural occurrence of silver nanoparticles (AgNPs) is lacking, but is needed to re-evaluate the sources of AgNPs in soils, which are commonly considered to derive from anthropogenic inputs. Here we demonstrate that POM reduces silver ions to AgNPs under solar irradiation, by producing superoxide radicals from phenol-like groups. The contribution of POM to the naturally occurring AgNPs is estimated to be 11–31%. By providing fresh insight into the sources of AgNPs in soils, our study facilitates unbiased assessments of the fate and impacts of anthropogenic AgNPs. Moreover, the reducing role of POM is likely widespread within surface environments and is expected to significantly influence the biogeochemical cycling of Ag and other contaminants that are reactive towards phenol-like groups. |
| first_indexed | 2024-10-01T06:59:27Z |
| format | Journal Article |
| id | ntu-10356/89747 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:59:27Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/897472020-09-26T22:01:38Z Significant contribution of metastable particulate organic matter to natural formation of silver nanoparticles in soils Huang, Ying-Nan Qian, Ting-Ting Dang, Fei Yin, Yong-Guang Li, Min Zhou, Dong-Mei Advanced Environmental Biotechnology Centre Nanyang Environment and Water Research Institute Science::Geology Silver Nanoparticles Particulate Organic Matter Particulate organic matter (POM) is distributed worldwide in high abundance. Although insoluble, it could serve as a redox mediator for microbial reductive dehalogenation and mineral transformation. Quantitative information on the role of POM in the natural occurrence of silver nanoparticles (AgNPs) is lacking, but is needed to re-evaluate the sources of AgNPs in soils, which are commonly considered to derive from anthropogenic inputs. Here we demonstrate that POM reduces silver ions to AgNPs under solar irradiation, by producing superoxide radicals from phenol-like groups. The contribution of POM to the naturally occurring AgNPs is estimated to be 11–31%. By providing fresh insight into the sources of AgNPs in soils, our study facilitates unbiased assessments of the fate and impacts of anthropogenic AgNPs. Moreover, the reducing role of POM is likely widespread within surface environments and is expected to significantly influence the biogeochemical cycling of Ag and other contaminants that are reactive towards phenol-like groups. Published version 2019-09-09T01:39:18Z 2019-12-06T17:32:32Z 2019-09-09T01:39:18Z 2019-12-06T17:32:32Z 2019 Journal Article Huang, Y.-N., Qian, T.-T., Dang, F., Yin, Y.-G., Li, M., & Zhou, D.-M. (2019). Significant contribution of metastable particulate organic matter to natural formation of silver nanoparticles in soils. Nature Communications, 10, 3775-. doi:10.1038/s41467-019-11643-6 https://hdl.handle.net/10356/89747 http://hdl.handle.net/10220/49893 10.1038/s41467-019-11643-6 en Nature Communications © 2019 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. 8 p. application/pdf |
| spellingShingle | Science::Geology Silver Nanoparticles Particulate Organic Matter Huang, Ying-Nan Qian, Ting-Ting Dang, Fei Yin, Yong-Guang Li, Min Zhou, Dong-Mei Significant contribution of metastable particulate organic matter to natural formation of silver nanoparticles in soils |
| title | Significant contribution of metastable particulate organic matter to natural formation of silver nanoparticles in soils |
| title_full | Significant contribution of metastable particulate organic matter to natural formation of silver nanoparticles in soils |
| title_fullStr | Significant contribution of metastable particulate organic matter to natural formation of silver nanoparticles in soils |
| title_full_unstemmed | Significant contribution of metastable particulate organic matter to natural formation of silver nanoparticles in soils |
| title_short | Significant contribution of metastable particulate organic matter to natural formation of silver nanoparticles in soils |
| title_sort | significant contribution of metastable particulate organic matter to natural formation of silver nanoparticles in soils |
| topic | Science::Geology Silver Nanoparticles Particulate Organic Matter |
| url | https://hdl.handle.net/10356/89747 http://hdl.handle.net/10220/49893 |
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