A novel compound, 9-hydroxy-1-nitropyrene, is a major photodegraded compound of 1-nitropyrene in the environment.
1-Nitropyrene is a widely distributed environmental contaminant, but its fate in the environment remains unknown. 1-Nitropyrene in benzene exposed to sunlight was found to degrade rapidly, whereas 1-nitropyrene adsorbed on soot was stable and degraded at a rate of 42% in 40 d. The major degraded compound was identified as 9-hydroxy-1-nitropyrene, using nuclear magnetic resonance and gas chromatography/mass spectrometry. Concentrations of 9-hydroxy-1-nitropyrene were found to be between 15 and 23 pg/m3 in urban airborne samples. The mutagenic potency of 9-hydroxy-1-nitropyrene was much lower than that of 1-nitropyrene. We concluded that 1-nitropyrene in the environment is photodegraded into 9-hydroxy-1-nitropyrene to become a less mutagenic compound.
Koizumi
A
A
Department of Hygiene, Akita University School of Medicine, Japan.
Saitoh
N
N
Suzuki
T
T
Kamiyama
S
S
D000327:Adsorption; D000393:Air Pollutants / Q000032:analysis / Q000378:metabolism*; D001554:Benzene; D002244:Carbon; D004784:Environmental Monitoring; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D007564:Japan; D009682:Magnetic Resonance Spectroscopy; D009152:Mutagenicity Tests; D010782:Photolysis; D011721:Pyrenes / Q000032:analysis* / Q000378:metabolism*; D014505:Urban Population
D000393:Air Pollutants; D011721:Pyrenes; D002244:Carbon; C086755:9-hydroxy-1-nitropyrene; D001554:Benzene; C032668:1-nitropyrene