Removal of Trichloroethylene from Water by Bimetallic Ni/Fe Nanoparticles
Chlorinated organic solvents (COSs) are a significant threat to human beings. In this study, nanoscale bimetallic Ni/Fe particles were synthesized from the reaction of sodium borohydride (NaBH<sub>4</sub>) with the reduction of Ni<sup>2+</sup> and Fe<sup>2+</sup>...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-05-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/14/10/1616 |
| _version_ | 1797494453715337216 |
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| author | Xiaonan Liu Minghong Wu Jian Zhao |
| author_facet | Xiaonan Liu Minghong Wu Jian Zhao |
| author_sort | Xiaonan Liu |
| collection | DOAJ |
| description | Chlorinated organic solvents (COSs) are a significant threat to human beings. In this study, nanoscale bimetallic Ni/Fe particles were synthesized from the reaction of sodium borohydride (NaBH<sub>4</sub>) with the reduction of Ni<sup>2+</sup> and Fe<sup>2+</sup> in an aqueous solution. The synthesized nanoscale zero-valent iron (nZVI) and Ni-nZVI were characterized by SEM (scanning electron microscopy), XRD (X-ray diffractometer), Brunauer–Emmett–Teller (BET), and transmission electron microscopy (TEM). The removal performance of trichloroethylene (TCE) over the nZVI catalyst and Ni-nZVI was evaluated. Ni-nZVI with different Ni contents exhibited good reactivity towards the dechlorination of TCE over a 1h period, and the pseudo-first-order rate constant for TCE dechlorination by Ni-nZVI was 1.4–3.5 times higher than that of nZVI. Ni-nZVI with 5 wt% Ni contents exhibited the best dechlorination effect; the removal rates of TCE and its by-product dichloroethylene (DCE) were 100% and 63.69%, respectively. These results indicated that the Ni nanoparticles as the second dopant metal were better than nZVI for TCE degradation. This determination of the optimal Ni-NZVI load ratio provides a factual and theoretical basis for the subsequent application of nano-metal binding in the environment. |
| first_indexed | 2024-03-10T01:34:31Z |
| format | Article |
| id | doaj.art-5b6b67a5997347578c965b667c12a831 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T01:34:31Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-5b6b67a5997347578c965b667c12a8312023-11-23T13:35:12ZengMDPI AGWater2073-44412022-05-011410161610.3390/w14101616Removal of Trichloroethylene from Water by Bimetallic Ni/Fe NanoparticlesXiaonan Liu0Minghong Wu1Jian Zhao2Key Laboratory of Organic Compound Pollution Control Engineering, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, ChinaKey Laboratory of Organic Compound Pollution Control Engineering, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, ChinaKey Laboratory of Organic Compound Pollution Control Engineering, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, ChinaChlorinated organic solvents (COSs) are a significant threat to human beings. In this study, nanoscale bimetallic Ni/Fe particles were synthesized from the reaction of sodium borohydride (NaBH<sub>4</sub>) with the reduction of Ni<sup>2+</sup> and Fe<sup>2+</sup> in an aqueous solution. The synthesized nanoscale zero-valent iron (nZVI) and Ni-nZVI were characterized by SEM (scanning electron microscopy), XRD (X-ray diffractometer), Brunauer–Emmett–Teller (BET), and transmission electron microscopy (TEM). The removal performance of trichloroethylene (TCE) over the nZVI catalyst and Ni-nZVI was evaluated. Ni-nZVI with different Ni contents exhibited good reactivity towards the dechlorination of TCE over a 1h period, and the pseudo-first-order rate constant for TCE dechlorination by Ni-nZVI was 1.4–3.5 times higher than that of nZVI. Ni-nZVI with 5 wt% Ni contents exhibited the best dechlorination effect; the removal rates of TCE and its by-product dichloroethylene (DCE) were 100% and 63.69%, respectively. These results indicated that the Ni nanoparticles as the second dopant metal were better than nZVI for TCE degradation. This determination of the optimal Ni-NZVI load ratio provides a factual and theoretical basis for the subsequent application of nano-metal binding in the environment.https://www.mdpi.com/2073-4441/14/10/1616zero-valent ironnickel-zero-valent irontrichloroethyldichloroethylene |
| spellingShingle | Xiaonan Liu Minghong Wu Jian Zhao Removal of Trichloroethylene from Water by Bimetallic Ni/Fe Nanoparticles Water zero-valent iron nickel-zero-valent iron trichloroethyl dichloroethylene |
| title | Removal of Trichloroethylene from Water by Bimetallic Ni/Fe Nanoparticles |
| title_full | Removal of Trichloroethylene from Water by Bimetallic Ni/Fe Nanoparticles |
| title_fullStr | Removal of Trichloroethylene from Water by Bimetallic Ni/Fe Nanoparticles |
| title_full_unstemmed | Removal of Trichloroethylene from Water by Bimetallic Ni/Fe Nanoparticles |
| title_short | Removal of Trichloroethylene from Water by Bimetallic Ni/Fe Nanoparticles |
| title_sort | removal of trichloroethylene from water by bimetallic ni fe nanoparticles |
| topic | zero-valent iron nickel-zero-valent iron trichloroethyl dichloroethylene |
| url | https://www.mdpi.com/2073-4441/14/10/1616 |
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