Based on a diesel bus certified to China Ⅲemission standards, thecomposition of particulates emission with different proportions of biodiesel was investigated during China city bus cycle (CCBC) on a heavy chassis dynamometer. The results show that soluble organic fraction (SOF) was mainly consists of fatty acid and N-alkanes, while Hopanes and PAHs account for less than 7%. Biodiesel has a significant impact on the compositions, with the proportion of biodiesel going up, EC decreased while OC/EC and SOF increased, C18:2 and C18:1 of fatty acids increased apparently while C12:0 and C14 decreased, N-alkanes and Hopanes components also decreased. The mass of PAHs is concentrated in medium and small molecular with 3 or 4 Benzene rings, while the toxicity of PAHs concentrated in medium and high molecular with more than 4 Benzene rings. When using biodiesel, the mass of PAHs decreased apparently, especially Pyr, FL and PA, while the toxicity changedlittle.
楼狄明, 耿小雨, 谭丕强, 胡志远, 孙瑜泽. 公交车燃用不同比例生物柴油的颗粒物组分特性研究[J]. 中国环境科学, 2017, 37(9): 3285-3291.
LOU Di-ming, GENG Xiao-yu, TAN Pi-qiang, HU Zhi-yuan, Zhang Yun-hua, SUN Yu-ze. Particulates composition characteristics from a bus fueled with different proportions of biodiesel. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(9): 3285-3291.
Liu Z, Lu M, Brich M E, et al. Variations of the particulate carbon distribution from a nonroad diesel generator[J]. Environmental Science & Technology, 2005,39(20):7840-4.
Office of Transportation and air quality, US. EPA. A comprehensive analysis of biodiesel impacts on exhaust emissions[R]. EPA Report, 420-P-02-001, Cincinnati, USA:Environmental Protection Agency, 2002.
[7]
Tan P Q, Hu Z Y, Lou D M, et al. Exhaust emissions from a light-duty diesel engine with Jatropha biodiesel fuel.[J]. Energy, 2012,39(1):356-362.
Sharp C A, Howell S A, Jobe J. The effect of biodiesel fuels on transient emissions from modern diesel engines, Part Ⅱ unregulated emissions and chemical characterization[C]//CEC/SAE Spring Fuels & Lubricants Meeting & Exposition, 2000:1784-1807.
[14]
Watson J G, Chow J C, Lowenthal D H, et al. Differences in the carbon composition of source profiles for diesel-and gasoline-powered vehicles[J]. Atmospheric Environment, 1994,28(15):2493-2505.
Nisbet I C, Lagoy P K. Toxic equivalency factors (TEFs) for polycyclic aromatic hydrocarbons (PAHs).[J]. Regulatory Toxicology & Pharmacology Rtp, 1992,16(3):290.
[19]
Madill R E A, Brownlee B G, Josephy P D, et al. Comparison of the ames salmonella assay and mutatox genotoxicity assay for assessing the mutagenicity of polycyclic aromatic compounds in porewater from athabasca oil sands mature fine tailings[J]. Environmental Science & Technology, 1999,33(15):2510-2516.
[20]
Jin T, Liang Q, Liu S, et al. Chemical characteristics of particulate matter emitted from a heavy duty diesel engine and correlation among inorganic and PAH components[J]. Fuel, 2014,116(1):655-661.
[21]
Marr L C, And T W K, Harley R A, et al. Characterization of polycyclic aromatic hydrocarbons in motor vehicle fuels and exhaust emissions[J]. Environmental Science & Technology, 1999,33(18):3091-3099.