The fate of aniline after a photo-fenton reaction in an aqueous system containing iron(III), humic acid, and hydrogen peroxide

Journal Article · Mon May 15 04:00:00 EDT 2000 · Environmental Science and Technology

DOI:https://doi.org/10.1021/es991058k· OSTI ID:20080461

Fukushima, Masami; Tatsumi, Kenji; Morimoto, Kengo

The degradation of aniline (ArNH{sub 2}) was facilitated by light irradiation ({lambda} > 370 nm) of an aqueous solution, which contained Fe(III), humic acid(HA), and H{sub 2}O{sub 2}. The consumption of H{sub 2}O{sub 2} and the reduction of Fe(III) to Fe(II) was consistent with the degradation of ArNH{sub 2} via the photo-Fenton reaction, accompanied by the generation of hydroxyl radicals (HO{sm_bullet}). HPLC analysis of the reaction mixture indicated the presence of p-aminophenol, p-hydroquinone, and maleic and fumaric acids and the simultaneous release of NH{sub 4}{sup +} ion. However, the sum of the product concentrations, as determined by HPLC after the reaction, was much smaller than the ArNH{sub 2} concentration added initially. This can be attributed to the majority of the ArNH{sub 2} being incorporated into the polymeric structure in the HA after the reaction. The {sup 15}N NMR and pyrolysis-GC/MS studies indicated that, after the reaction, ArNH{sub 2} formed covalent bonds with quinone and the vinyl carbons in the HA, to form anilino-compounds, such as anilinoquinone and enaminone.

• Research Organization: National Inst. for Resources and Environment, Tsukuba (JP)
• OSTI ID: 20080461
• Journal Information: Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 10 Vol. 34; ISSN ESTHAG; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ANILINE
ENVIRONMENTAL TRANSPORT
GROUND WATER
HUMIC ACIDS
HYDROGEN PEROXIDE
IRON
PHOTOCHEMICAL REACTIONS
REMEDIAL ACTION
SOILS
WATER CHEMISTRY