Back to Search
Start Over
Oxidative transformation of 1-naphthylamine in water mediated by different environmental black carbons
- Source :
- Journal of hazardous materials. 403
- Publication Year :
- 2020
-
Abstract
- 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 O2 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 sp2-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.
- Subjects :
- 021110 strategic, defence & security studies
Environmental Engineering
Health, Toxicology and Mutagenesis
0211 other engineering and technologies
chemistry.chemical_element
02 engineering and technology
Carbon black
010501 environmental sciences
medicine.disease_cause
Photochemistry
01 natural sciences
Pollution
Soot
Catalysis
chemistry.chemical_compound
chemistry
Biochar
medicine
Environmental Chemistry
Reactivity (chemistry)
Graphite
Waste Management and Disposal
Carbon
0105 earth and related environmental sciences
Naphthalene
Subjects
Details
- ISSN :
- 18733336
- Volume :
- 403
- Database :
- OpenAIRE
- Journal :
- Journal of hazardous materials
- Accession number :
- edsair.doi.dedup.....e6dbd1c05f4ce35977246b7b643d9ece