- 期刊
- OpenAccess
Characteristics of PM_(2.5)-bound PCDD/Fs, PCBs, PBDD/Fs and PBDEs from a Diesel Generator Using Waste Cooking Oil-based Biodiesel Blends
摘要
This study investigates fine particulate matter (PM_(2.5)) bound persistent organic pollutants (POPs) emitted from a diesel generator fueled with three waste cooking oil-based biodiesel (WCO-biodiesel) blends (W0 (pure diesel), W20 (WCO-biodiesel/ diesel = 20%/80% (v/v)), and W40). These POPs are polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyl (PCBs), polybrominated dibenzo-p-dioxins and dibenzofurans (PBDD/Fs) and polybrominated diphenyl ethers (PBDEs). Experimental results indicate that the mass concentrations of PM_(2.5)-bound PCDD/Fs, PCBs, PBDD/Fs and PBDEs in the engine exhaust are 2.15-3.65, 16.7-35.4, 25.8-46.5 and 303-440 pg Nm^(-3), respectively, at 1.5-3.0 kW loads for using W0, while the corresponding toxic equivalent (TEQ) concentrations of the above PM_(2.5)-bound pollutants are 0.282-0.527, 0.038-0.051 and 0.064-0.093 pg WHO_(2005-)TEQ Nm^(-3), respectively (excluding PBDEs, which still have no toxic equivalency factors (TEFs) for TEQ calculation). Using W20 and W40 reduced the mass and TEQ emission concentrations of PM_(2.5)-bound PCDD/Fs, PCBs, PBDD/Fs and PBDEs in comparison with W0. The reductions of mass concentrations in exhausted PM_(2.5) were in the order PBDEs ＞＞ PBDD/Fs ＞ PCBs ＞ PCDD/Fs, while the decrease in toxic concentration followed the order PCDD/Fs ＞ PBDD/Fs ＞ PCBs. Thus, adding WCO-biodiesel to the fuel mixture in generator engines lowers the adverse effects of PM_(2.5) emissions on the environment and human health.
延伸閱讀
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