Impact of solution chemistry on the properties and bactericidal activity of silver nanoparticles decorated on superabsorbent cryogels
This study investigated the effects of dissolved organic matter (DOM) and various electrolytes commonly found in environmental aqueous matrices on the physicochemical properties and bactericidal efficacy of silver nanoparticles (AgNPs), which are immobilized on cryogels (or PSA/AgNP cryogel). The Ag...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Language: | English |
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2015
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| Online Access: | https://hdl.handle.net/10356/80948 http://hdl.handle.net/10220/38968 |
| _version_ | 1826125472975552512 |
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| author | Loo, Siew-Leng Krantz, William B. Hu, Xiao Lim, Teik-Thye Fane, Anthony Gordon |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Loo, Siew-Leng Krantz, William B. Hu, Xiao Lim, Teik-Thye Fane, Anthony Gordon |
| author_sort | Loo, Siew-Leng |
| collection | NTU |
| description | This study investigated the effects of dissolved organic matter (DOM) and various electrolytes commonly found in environmental aqueous matrices on the physicochemical properties and bactericidal efficacy of silver nanoparticles (AgNPs), which are immobilized on cryogels (or PSA/AgNP cryogel). The AgNPs in the PSA/AgNP cryogel that were exposed to different media underwent morphological transformation in terms of particle size and structure. In addition, the presence of DOM and electrolytes increased the release of dissolved Ag. The biological uptake of Ag species (determined as the total Ag in exposed cells) increased in the presence of DOM, but decreased in the presence of electrolytes. The presence of electrolytes did not result in any significant reduction in the bactericidal activity. Although an initial increase of the DOM to 2.5 mg-C L−1 attenuated the bactericidal efficacy of the immobilized AgNPs, an increase in the DOM concentration beyond 5 mg-C L−1 enhanced the bactericidal efficacy. This study found that the bactericidal activity of the immobilized AgNPs is less sensitive to the solution chemistry relative to the free AgNPs. This suggests that immobilizing the AgNPs in a supporting material is a good strategy to preserve their efficacy for disinfection in various aqueous matrices. |
| first_indexed | 2024-10-01T06:37:11Z |
| format | Journal Article |
| id | ntu-10356/80948 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:37:11Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/809482020-09-26T22:01:14Z Impact of solution chemistry on the properties and bactericidal activity of silver nanoparticles decorated on superabsorbent cryogels Loo, Siew-Leng Krantz, William B. Hu, Xiao Lim, Teik-Thye Fane, Anthony Gordon School of Materials Science & Engineering School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Environmental matrix E. coli Silver Composite Disinfection Dissolution Hydrogel This study investigated the effects of dissolved organic matter (DOM) and various electrolytes commonly found in environmental aqueous matrices on the physicochemical properties and bactericidal efficacy of silver nanoparticles (AgNPs), which are immobilized on cryogels (or PSA/AgNP cryogel). The AgNPs in the PSA/AgNP cryogel that were exposed to different media underwent morphological transformation in terms of particle size and structure. In addition, the presence of DOM and electrolytes increased the release of dissolved Ag. The biological uptake of Ag species (determined as the total Ag in exposed cells) increased in the presence of DOM, but decreased in the presence of electrolytes. The presence of electrolytes did not result in any significant reduction in the bactericidal activity. Although an initial increase of the DOM to 2.5 mg-C L−1 attenuated the bactericidal efficacy of the immobilized AgNPs, an increase in the DOM concentration beyond 5 mg-C L−1 enhanced the bactericidal efficacy. This study found that the bactericidal activity of the immobilized AgNPs is less sensitive to the solution chemistry relative to the free AgNPs. This suggests that immobilizing the AgNPs in a supporting material is a good strategy to preserve their efficacy for disinfection in various aqueous matrices. NRF (Natl Research Foundation, S’pore) EDB (Economic Devt. Board, S’pore) Accepted version 2015-12-04T07:53:36Z 2019-12-06T14:18:04Z 2015-12-04T07:53:36Z 2019-12-06T14:18:04Z 2015 Journal Article Loo, S.-L., Krantz, W. B., Hu, X., Fane, A. G., & Lim, T.-T. (2016). Impact of solution chemistry on the properties and bactericidal activity of silver nanoparticles decorated on superabsorbent cryogels. Journal of Colloid and Interface Science, 461, 104-113. 0021-9797 https://hdl.handle.net/10356/80948 http://hdl.handle.net/10220/38968 10.1016/j.jcis.2015.09.007 en Journal of Colloid and Interface Science © 2015 Elsevier Inc. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Colloid and Interface Science, Elsevier Inc. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.jcis.2015.09.007]. 32 p. application/pdf |
| spellingShingle | Environmental matrix E. coli Silver Composite Disinfection Dissolution Hydrogel Loo, Siew-Leng Krantz, William B. Hu, Xiao Lim, Teik-Thye Fane, Anthony Gordon Impact of solution chemistry on the properties and bactericidal activity of silver nanoparticles decorated on superabsorbent cryogels |
| title | Impact of solution chemistry on the properties and bactericidal activity of silver nanoparticles decorated on superabsorbent cryogels |
| title_full | Impact of solution chemistry on the properties and bactericidal activity of silver nanoparticles decorated on superabsorbent cryogels |
| title_fullStr | Impact of solution chemistry on the properties and bactericidal activity of silver nanoparticles decorated on superabsorbent cryogels |
| title_full_unstemmed | Impact of solution chemistry on the properties and bactericidal activity of silver nanoparticles decorated on superabsorbent cryogels |
| title_short | Impact of solution chemistry on the properties and bactericidal activity of silver nanoparticles decorated on superabsorbent cryogels |
| title_sort | impact of solution chemistry on the properties and bactericidal activity of silver nanoparticles decorated on superabsorbent cryogels |
| topic | Environmental matrix E. coli Silver Composite Disinfection Dissolution Hydrogel |
| url | https://hdl.handle.net/10356/80948 http://hdl.handle.net/10220/38968 |
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