Oxidative transformation of 1-naphthylamine in water mediated by different environmental black carbons.
In: Journal of hazardous materials, Jg. 403 (2021-02-05), S. 123594
academicJournal
Zugriff:
Black carbons (BCs) are ubiquitous in the natural environment and can significantly influence the environmental behavior of pollutants. This work examined the mediating effects of graphite, soot, and biochar on 1-naphthylamine (1-NA) oxidation under aerobic conditions. It was shown that the three BCs significantly promoted the oxidation of 1-NA in the dark, and the mediation efficiency of graphite was much greater than that of soot or biochar. The oxidation products were the coupling oligomers (dimers and trimers) and the oxygen-containing oligomers of 1-NA (di-OH-1-NA, OH-azo naphthalene, OH-trimers and amino-naphthoquinone derivatives etc.). The phenolic OH on BCs were identified as the active sites for 1-NA oxidation, which could stimulate O 2 to produce reactive oxygen species through successive single electron transfer and then cause 1-NA oxidation. Moreover, the superior catalytic performance of graphite was also related to its high electrical conductivity. The synergies between the sp 2 -hybridized carbon surface and the active sites (such as phenolic OH and defects) facilitated the oxidation of 1-NA on graphite. Findings in this study not only are helpful for better understanding the reactivity of environmental BCs, but also provide new insights into the risk assessment of 1-NA in the natural environment.
(Copyright © 2020 Elsevier B.V. All rights reserved.)
Titel: |
Oxidative transformation of 1-naphthylamine in water mediated by different environmental black carbons.
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Autor/in / Beteiligte Person: | Yang, Y ; Pei, Z ; Yan, L ; Ma, J ; Zhang, Z ; Li, Y ; Yang, R ; Wang, P ; Zhu, Y ; Zhang, Q |
Zeitschrift: | Journal of hazardous materials, Jg. 403 (2021-02-05), S. 123594 |
Veröffentlichung: | Amsterdam : Elsevier,, 2021 |
Medientyp: | academicJournal |
ISSN: | 1873-3336 (electronic) |
DOI: | 10.1016/j.jhazmat.2020.123594 |
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