THE EFFECT OF FUEL COMPOSITION ON THE MUTAGENICITY OF DIESEL-ENGINE EXHAUST

被引:28
作者
CREBELLI, R [1 ]
CONTI, L [1 ]
CROCHI, B [1 ]
CARERE, A [1 ]
BERTOLI, C [1 ]
DELGIACOMO, N [1 ]
机构
[1] CNR,IST MOTORI,I-80125 NAPLES,ITALY
来源
MUTATION RESEARCH LETTERS | 1995年 / 346卷 / 03期
关键词
DIESEL FUEL; AROMATIC CONTENT; ENGINE EXHAUST; MUTAGENICITY;
D O I
10.1016/0165-7992(95)90049-7
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
The effect of fuel composition on the mutagenicity of diesel engine emission was investigated. To this end, a fuel matrix comprising fuels with different contents of aromatic and naphthenic compounds was used. Extracts of the organic phase of raw exhausts obtained with different fuels were tested for mutagenicity in bacterial reversion assays. The results obtained demonstrate that the mutagenicity of diesel exhaust is largely dependent on the aromatic content of the fuel. In fact, mutagenicity was greatly reduced when the aromatic content of the fuel was lowered by hydrogen treatment. Conversely, mutagenicity was enhanced when the fuel was enriched with fractions of di- or triaromatic compounds. The addition of di- and trinaphthenic compounds only produced borderline mutagenicity. No clear relationship was observed between sulfur content of the fuel and mutagenicity of the exhaust. Assays in bacterial strains with different sensitivity to nitroaromatic compounds suggest a low contribution of the highly mutagenic dinitropyrenes to the responses observed, and a relatively greater contribution of l-nitropyrene or other nitroaromatics processed by the same bacterial nitroreductase.
引用
收藏
页码:167 / 172
页数:6
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