The enhanced reduction of bromate by highly reactive and dispersive green nano-zerovalent iron (G-NZVI) synthesized with onion peel extract
Lem O. Yoon S. Bae S. Lee W.
27 January 2021Royal Society of Chemistry
RSC Advances
2021#11Issue 95008 - 5018 pp.
In this study, novel green nano-zerovalent iron (G-NZVI) is synthesized for the first time using onion peel extract for the prevention of rapid surface oxidation and the enhancement of particle dispersibility with a high reductive capacity. The results from various surface analyses revealed that the spherical shape of G-NZVI was fully covered by the onion peel extract composed of polyphenolic compounds with CC-CC unsaturated carbon, CC, C-O, and O-H bonds, resulting in high mobility during column chromatography. Furthermore, the obtained G-NZVI showed the complete removal of 50 mg L-1 of bromate (BrO3-) in 2 min under both aerobic (k = 4.42 min-1) and anaerobic conditions (k = 4.50 min-1), showing that G-NZVI had outstanding oxidation resistance compared to that of bare NZVI. Moreover, the observed performance of G-NZVI showed that it was much more reactive than other well-known reductants (e.g., Fe and Co metal organic frameworks), regardless of whether aerobic or anaerobic conditions were used. The effects of G-NZVI loading, the BrO3- concentration, and pH on the BrO3- removal kinetics using G-NZVI were also investigated in this study. The results provide the novel insight that organic onion peel waste can be reused to synthesize highly reactive anti-oxidative nanoparticles for the treatment of inorganic chemical species and heavy metals in water and wastewater. This journal is
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Department of Civil and Environmental Engineering, National Laboratory Astana, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
Department of Civil and Environmental Engineering, Konkuk University, Seoul, 05029, South Korea
Department of Civil and Environmental Engineering
Department of Civil and Environmental Engineering
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