Influence of ethanol-diesel blended fuels on diesel exhaust emissions and mutagenic and genotoxic activities of particulate extracts.
This study was aimed at evaluating the influence of ethanol addition on diesel exhaust emissions and the toxicity of particulate extracts. The experiments were conducted on a heavy-duty diesel engine and five fuels were used, namely: E0 (base diesel fuel), E5 (5%), E10 (10%), E15 (15%) and E20 (20%), respectively. The regulated emissions (THC, CO, NOx, PM) and polycyclic aromatic hydrocarbon (PAH) emissions were measured, and Ames test and Comet assay, respectively, were used to investigate the mutagenicity and genotoxicity of particulate extracts. From the point of exhaust emissions, the introduction of ethanol to diesel fuel could result in higher brake specific THC (BSTHC) and CO (BSCO) emissions and lower smoke emissions, while the effects on the brake specific NOx (BSNOx) and particulate matters (BSPM) were not obvious. The PAH emissions showed an increasing trend with a growth of ethanol content in the ethanol-diesel blends. As to the biotoxicity, E20 always had the highest brake specific revertants (BSR) in both TA98 and TA100 with or without metabolizing enzymes (S9), while the lowest BSR were found in E5 except that of TA98-S9. DNA damage data showed a lower genotoxic potency of E10 and E15 as a whole.
Song
Chong-Lin
CL
State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China. songchonglin@tju.edu.cn
Zhou
Ying-Chao
YC
Huang
Rui-Jing
RJ
Wang
Yu-Qiu
YQ
Huang
Qi-Fei
QF
Lü
Gang
G
Liu
Ke-Ming
KM
D020552:Comet Assay; D000431:Ethanol; D005742:Gasoline; D009153:Mutagens / Q000633:toxicity*; D011084:Polycyclic Aromatic Hydrocarbons / Q000633:toxicity; D012486:Salmonella typhimurium / Q000187:drug effects; D001335:Vehicle Emissions / Q000633:toxicity*
D005742:Gasoline; D009153:Mutagens; D011084:Polycyclic Aromatic Hydrocarbons; D001335:Vehicle Emissions; D000431:Ethanol