TY - JOUR AB - This study used pure fossil diesel (D100) and a 20% (v/v, volume percent) waste-edible-oil-biodiesel blend (W20, 20% waste-edible-oil-biodiesel + 80% diesel) as the fuels for a generator to investigate the mass concentrations of various sized PMs (PM0.01-0.056 (nano particles), PM0.01-0.1 (ultrafine particles), PM0.01-1 (submicron particles), PM0.01-2.5 (fine particles), PM0.01-10 and PM0.01-18) and particle-bound carbons, polycyclic aromatic hydrocarbons (PAHs), and PAHs' toxicity equivalences (BaPeq) in generator emissions. The engine load was set as either 0 or 3 kW. MOUDIs and Nano-MOUDIs were used as the samplers. Human male single cells (U937) and the method MTT (3-(4,5-dimethyl-thiazol-2-yl)-2,5-diphenyltetrazolium bromide) were used to test the cell toxicity of particle extracts (obtained from organic-solvent extraction). The results showed that, compared with D100, using W20 effectively reduced the PM (by 21.0-72.8%), particulate EC (by 2.69-57.3%), particulate OC (by 30.8-47.5%), Total-PAHs (by 64.1-81.9%), and Total-BaPeq (by 70.9-92.6%) in all sized particles emitted from the diesel generator, regardless of engine load. The reduction of PM0.01-18 (81.3%) was higher in the lung respirable accumulation mode particles (PM0.1-1). Regardless of fuel and loading, the emitted PM0.01-18 exhibited a single-modal distribution and peaked in the submicron size range (0.18-0.32 mu m). Compared with no engine load, with the exception of PM0.01-0.1 and PM0.01-0.056, the OC contents of various particle sizes in PM at 3 kW engine load using D100 and W20 were all reduced (by 13.3-15.0% and 28.9-31.7%, respectively), while the EC content increased (by 27.5-29.1% and 37.9-41.4%, respectively). Moreover, the cell toxicity to U937 (per mu g PM) of particle extract was higher for nano (PM0.01-0.056) and ultrafine (PM0.056-0.1) particles than for the other sized ones. However, compared with D100, using W20 could reduce the cell toxicity to U937 (per mu g PM) of extracts from all sized particles, especially for nano and ultrafine particles (reduction = 32-46%) at 3 kW engine load. AD - Natl Pingtung Univ Sci & Technol, Dept Environm Sci & Engn, Nei Pu 91201, Pingtung County, Taiwan AN - WOS:000308976500014 AU - Tsai, J. H. AU - Chen, S. J. AU - Huang, K. L. AU - Lin, T. C. AU - Chaung, H. C. AU - Chiu, C. H. AU - Chiu, J. Y. AU - Lin, C. C. AU - Tsai, P. Y. DA - Oct DO - 10.4209/aaqr.2012.07.0181 IS - 5 J2 - Aerosol Air Qual Res KW - waste-edible-oil-biodiesel LA - English N1 - 008sj PY - 2012 SN - 1680-8584 SP - 843-855 ST - PM, Carbon, PAH, and Particle-Extract-Induced Cytotoxicity Emissions from a Diesel Generator Fueled with Waste-Edible-Oil-Biodiesel T2 - Aerosol and Air Quality Research TI - PM, Carbon, PAH, and Particle-Extract-Induced Cytotoxicity Emissions from a Diesel Generator Fueled with Waste-Edible-Oil-Biodiesel UR - ://WOS:000308976500014 VL - 12 ID - 8201 ER -