Highly Efficient and Stable Removal of Arsenic by Live Cell Fabricated Magnetic Nanoparticles
As concerns about public health and environmental problems regarding contamination by toxic substances increase worldwide, the development of a highly effective and specific treatment method is imperative. Although physicochemical arsenic treatment methods have been developed, microbial in vivo reme...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-07-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/20/14/3566 |
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| author | Hyo Kyeong Kim Sun-Wook Jeong Jung Eun Yang Yong Jun Choi |
| author_facet | Hyo Kyeong Kim Sun-Wook Jeong Jung Eun Yang Yong Jun Choi |
| author_sort | Hyo Kyeong Kim |
| collection | DOAJ |
| description | As concerns about public health and environmental problems regarding contamination by toxic substances increase worldwide, the development of a highly effective and specific treatment method is imperative. Although physicochemical arsenic treatment methods have been developed, microbial in vivo remediation processes using live cell fabricated nanoparticles have not yet been reported. Herein, we report the development of magnetic iron nanoparticles immobilized an extremophilic microorganism, <i>Deinococcus radiodurans</i> R1, capable of removing toxic arsenic species. First, in vivo synthesis of magnetic iron nanoparticles was successfully achieved with the <i>D. radiodurans</i> R1 strain and characterized by scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), dynamic light scattering (DLS), zeta-potential, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analysis. Second, the maximum removal capacity of the magnetic iron nanoparticle-immobilized <i>D. radiodurans</i> R1 strain (DR-FeNPs) for arsenic [As(V)] was evaluated under the optimized conditions. Finally, the removal capacity of DR-FeNPs in the presence of various competitive anions was also investigated to simulate the practical application. More than 98% of As(V) was efficiently removed by DR-FeNPs within 1 h, and the removal efficiency was stably maintained for up to 32 h (98.97%). Furthermore, the possibility of recovery of DR-FeNPs after use was also suggested using magnets as a proof-of-concept. |
| first_indexed | 2024-04-13T02:19:36Z |
| format | Article |
| id | doaj.art-b9385abafdfd40fdaa324f541b0e7640 |
| institution | Directory Open Access Journal |
| issn | 1422-0067 |
| language | English |
| last_indexed | 2024-04-13T02:19:36Z |
| publishDate | 2019-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-b9385abafdfd40fdaa324f541b0e76402022-12-22T03:07:02ZengMDPI AGInternational Journal of Molecular Sciences1422-00672019-07-012014356610.3390/ijms20143566ijms20143566Highly Efficient and Stable Removal of Arsenic by Live Cell Fabricated Magnetic NanoparticlesHyo Kyeong Kim0Sun-Wook Jeong1Jung Eun Yang2Yong Jun Choi3School of Environmental Engineering, University of Seoul, Seoul 02504, KoreaSchool of Environmental Engineering, University of Seoul, Seoul 02504, KoreaWorld Institute of Kimchi, Gwangju 61755, KoreaSchool of Environmental Engineering, University of Seoul, Seoul 02504, KoreaAs concerns about public health and environmental problems regarding contamination by toxic substances increase worldwide, the development of a highly effective and specific treatment method is imperative. Although physicochemical arsenic treatment methods have been developed, microbial in vivo remediation processes using live cell fabricated nanoparticles have not yet been reported. Herein, we report the development of magnetic iron nanoparticles immobilized an extremophilic microorganism, <i>Deinococcus radiodurans</i> R1, capable of removing toxic arsenic species. First, in vivo synthesis of magnetic iron nanoparticles was successfully achieved with the <i>D. radiodurans</i> R1 strain and characterized by scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), dynamic light scattering (DLS), zeta-potential, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analysis. Second, the maximum removal capacity of the magnetic iron nanoparticle-immobilized <i>D. radiodurans</i> R1 strain (DR-FeNPs) for arsenic [As(V)] was evaluated under the optimized conditions. Finally, the removal capacity of DR-FeNPs in the presence of various competitive anions was also investigated to simulate the practical application. More than 98% of As(V) was efficiently removed by DR-FeNPs within 1 h, and the removal efficiency was stably maintained for up to 32 h (98.97%). Furthermore, the possibility of recovery of DR-FeNPs after use was also suggested using magnets as a proof-of-concept.https://www.mdpi.com/1422-0067/20/14/3566<i>Deinococcus radiodurans</i> R1bioremediationmagnetic nanoparticlearsenicadsorption |
| spellingShingle | Hyo Kyeong Kim Sun-Wook Jeong Jung Eun Yang Yong Jun Choi Highly Efficient and Stable Removal of Arsenic by Live Cell Fabricated Magnetic Nanoparticles International Journal of Molecular Sciences <i>Deinococcus radiodurans</i> R1 bioremediation magnetic nanoparticle arsenic adsorption |
| title | Highly Efficient and Stable Removal of Arsenic by Live Cell Fabricated Magnetic Nanoparticles |
| title_full | Highly Efficient and Stable Removal of Arsenic by Live Cell Fabricated Magnetic Nanoparticles |
| title_fullStr | Highly Efficient and Stable Removal of Arsenic by Live Cell Fabricated Magnetic Nanoparticles |
| title_full_unstemmed | Highly Efficient and Stable Removal of Arsenic by Live Cell Fabricated Magnetic Nanoparticles |
| title_short | Highly Efficient and Stable Removal of Arsenic by Live Cell Fabricated Magnetic Nanoparticles |
| title_sort | highly efficient and stable removal of arsenic by live cell fabricated magnetic nanoparticles |
| topic | <i>Deinococcus radiodurans</i> R1 bioremediation magnetic nanoparticle arsenic adsorption |
| url | https://www.mdpi.com/1422-0067/20/14/3566 |
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