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Removal of Trichloroethylene from Water by Bimetallic Ni/Fe Nanoparticles
| Content Provider | MDPI |
|---|---|
| Author | Liu, Xiaonan Wu, Minghong Zhao, Jian |
| Copyright Year | 2022 |
| 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 $(NaBH_{4}$) with the reduction of $Ni^{2+}$ and $Fe^{2+}$ 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. |
| Starting Page | 1616 |
| e-ISSN | 20734441 |
| DOI | 10.3390/w14101616 |
| Journal | Water |
| Issue Number | 10 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-05-18 |
| Access Restriction | Open |
| Subject Keyword | Water Environmental Engineering Environmental Sciences Zero-valent Iron Nickel-zero-valent Iron Trichloroethyl Dichloroethylene |
| Content Type | Text |
| Resource Type | Article |
