Observations of Twelve USEPA Priority Polycyclic Aromatic Hydrocarbons in the Aitken Size Range (10–32 nm D<sub><i>p</i></sub>)

Miguel, Antonio H.; Eiguren-Fernandez, Aarantzazu; Sioutas, Constantinos; Fine, Philip M.; Geller, Michael D.; Mayo, Paul R.

doi:10.1080/027868290950338

Cited by 15 publications

(12 citation statements)

References 20 publications

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“…This system has been used previously by many other investigators (e.g., Geller et al, 2002;Miguel et al, 2005). The designed cut-off sizes were 18, 3.2, 1.8, 1.0, 0.56, 0.32, 0.18, 0.10, 0.056, 0.032, 0.018, and 0.010 μm.…”

Section: Sampling Programmentioning

confidence: 99%

Size Distribution and Water Soluble Ions of Ambient Particulate Matter on Episode and Non-episode Days in Southern Taiwan

Tsai

Lin

Yao

et al. 2012

Aerosol Air Qual. Res.

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Distribution of inorganic ions at an urban/industrial/agricultural complex was investigated in southern Taiwan during particulate matter (PM) episode and non-episode periods, and the Micro Orifice Uniform Deposit Impactor (MOUDI) and nano-MOUDI were employed to take PM samples. In PM episode periods, the PM significantly increased in mass concentration and in the size ranges of 0.1-1.0 and 1.8-18 μm at the site. Sulfate, nitrate and ammonium were the dominant ionic species and contributed a large fraction of PM mass in different sizes. The nitrate concentration increase on episode days could be attributed to the increase of precursor gas-NO 2 concentration during these periods. In addition, SO 2 was significantly correlated to SO 4 2-in the nuclei mode (PM 0.1 ), which indicated that the gas had transferred into particulate matter. The molar equivalent ratio of {[NO

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Section: Sampling Programmentioning

confidence: 99%

Size Distribution and Water Soluble Ions of Ambient Particulate Matter on Episode and Non-episode Days in Southern Taiwan

Tsai

Lin

Yao

et al. 2012

Aerosol Air Qual. Res.

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“…Miguel et al (1998) found that significant fractions of diesel-derived PAHs were present in both the ultrafine size mode (D p < 0.12 μm) and the accumulation mode (0.12 μm < D p < 2 μm) in a tunnel. In 2005, Miguel et al (2005) Malcom and Dobson, 1994; b No TEF has been suggested.…”

Section: Total-pahs and Total-bap Eq Concentrations In Dpmsmentioning

confidence: 99%

PM, Carbon, PAH, and Particle-Extract-Induced Cytotoxicity of Emissions from a Diesel Generator Fueled with Waste-Edible-Oil-Biodiesel

Tsai

Chen

Huang

et al. 2012

Aerosol Air Qual. Res.

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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 (PM 0.01-0.056 (nano particles), PM 0.01-0.1 (ultrafine particles), PM 0.01-1 (submicron particles), PM 0.01-2.5 (fine particles), PM 0.01-10 and PM 0.01-18 ) and particle-bound carbons, polycyclic aromatic hydrocarbons (PAHs), and PAHs' toxicity equivalences (BaP eq ) 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-BaP eq (by 70.9-92.6%) in all sized particles emitted from the diesel generator, regardless of engine load. The reduction of PM 0.01-18 (81.3%) was higher in the lung respirable accumulation mode particles (PM 0.1-1 ). Regardless of fuel and loading, the emitted PM 0.01-18 exhibited a single-modal distribution and peaked in the submicron size range (0.18-0.32 μm). Compared with no engine load, with the exception of PM 0.01-0.1 and PM 0.01-0.056 , 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 μg PM) of particle extract was higher for nano ) and ultrafine (PM 0.056-0.1 ) particles than for the other sized ones. However, compared with D100, using W20 could reduce the cell toxicity to U937 (per μg PM) of extracts from all sized particles, especially for nano and ultrafine particles (reduction = 32-46%) at 3 kW engine load.

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“…Because of its superior aerodynamic design and outstanding performance characteristics, Nano-MOUDI ™ has an increasing application in environmental air quality and air pollution studies. [183][184][185][186][187][188][189][190] We believe its application in pharmaceutical nanoaerosol drug delivery characterization and modeling is very promising, as well.…”

mentioning

confidence: 99%

Nanomedicine in pulmonary delivery

Mansour¹,

Rhee²,

Wu³

2009

IJN

409

269

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Observations of Twelve USEPA Priority Polycyclic Aromatic Hydrocarbons in the Aitken Size Range (10–32 nm D_p)

Cited by 15 publications

References 20 publications

Size Distribution and Water Soluble Ions of Ambient Particulate Matter on Episode and Non-episode Days in Southern Taiwan

Size Distribution and Water Soluble Ions of Ambient Particulate Matter on Episode and Non-episode Days in Southern Taiwan

PM, Carbon, PAH, and Particle-Extract-Induced Cytotoxicity of Emissions from a Diesel Generator Fueled with Waste-Edible-Oil-Biodiesel

Nanomedicine in pulmonary delivery

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Observations of Twelve USEPA Priority Polycyclic Aromatic Hydrocarbons in the Aitken Size Range (10–32 nm Dp)

Cited by 15 publications

References 20 publications

Size Distribution and Water Soluble Ions of Ambient Particulate Matter on Episode and Non-episode Days in Southern Taiwan

Size Distribution and Water Soluble Ions of Ambient Particulate Matter on Episode and Non-episode Days in Southern Taiwan

PM, Carbon, PAH, and Particle-Extract-Induced Cytotoxicity of Emissions from a Diesel Generator Fueled with Waste-Edible-Oil-Biodiesel

Nanomedicine in pulmonary delivery

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Observations of Twelve USEPA Priority Polycyclic Aromatic Hydrocarbons in the Aitken Size Range (10–32 nm D_p)