摘要
报告了柴油发动机车辆在不同工况下排放废气中多环芳烃（ＰＡＨｓ）变化的规律及其对城市大气质量的影响。试验表明，不同类型的柴油发动机的排污量不同，即使是同一台柴油发动机在不同工况下，排污量也有较大差异，一般以负荷百分数在２％－－５％时排污量最小。在该废气和北京市区大气中分别检出了致突变性比苯并（ａ）芘更大的环戊二烯并（ｃ，ｄ）芘。
he changes in the concentration of polycyclic aromatic hydrocarbons (PAHs) in exhaust gas emitted from diesel vehicles under different working conditions and their effects on urban air quality were reported in this paper. The PAHs emissions were found to be related to the types of engine and their conditions, with the lowest emission generated upon an operation load of between about 2 %-- 5 %.Cyclopenta (c, d)pyrene was measured respectively in the exhaust gases and urban air,and was found to have a much higher mutagenicity than benzo(a)pyrene.
出处
《环境科学》
CAS
CSSCI
CSCD
北大核心
1994年第3期61-64,共4页
Environmental Science
关键词
柴油发动机
车辆
多环芳烃
diesel vehicles, poiycyclic aromatic hydrocarbons, air quality, cyclopenta (c, d ) pyrene.
