Secondary organic aerosol formation from naphthalene roadway emissions in the South Coast Air Basin of California

作者：Cohan Alexander; Eiguren Fernandez Arantzazu; Miguel Antonio H; Dabdub Donald^*

来源：International Journal of Environment and Pollution, 2013, 52(3-4): 206-224.

• air quality modelling
• environmental pollution
• naphthalene
• photochemistry
• secondary organic aerosol
• SOA
• gasoline and diesel emissions factors

Naphthalene is the simplest and most abundant polycyclic aromatic hydrocarbon (PAH) in California fuels, with concentrations of up to 2,600 mg L-1 in gasoline and 1,600 mg L-1 in diesel fuel. In this work, naphthalene emission factors for gasoline and diesel vehicles are combined with an activity-based automobile inventory to characterise anthropogenic naphthalene emissions in the South Coast Air Basin of California (SoCAB). A three-dimensional air quality model is used to examine transport and chemical reaction losses of naphthalene in the SoCAB. Inclusion of naphthalene emissions from on-road gasoline and diesel vehicles was found to increase modelled SOA growth by up to 10%. Hence, reductions of naphthalene from both gasoline and diesel fuels may be an effective means of reducing the emissions of an important SOA-forming precursor to the atmosphere of large urban centres with characteristics similar to the SoCAB. The implications of these findings are discussed.

• 出版日期2013