HR: 0830h
AN: A31D-0079    [PDF]
TI: Naphthalene and Naphthoquinone: Distributions and Human Exposure in the Los Angeles Basin
AU: * Lu, R
EM: rlu@ucla.edu
AF: Department of Atmospheric Sciences, University of California, Los Angeles, CA 90095-1565 United States
AU: Wu, J
EM: junwu@ucla.edu
AF: Department of Environmental Health Sciences, School of Public Health, University of California, Los Angeles, CA 90095-1772 United States
AU: Turco, R
EM: turco@ucla.edu
AF: Department of Atmospheric Sciences, University of California, Los Angeles, CA 90095-1565 United States
AU: Winer, A M
EM: amwiner@ucla.edu
AF: Department of Environmental Health Sciences, School of Public Health, University of California, Los Angeles, CA 90095-1772 United States
AU: Atkinson, R
EM: roger.atkinson@ucr.edu
AF: Department of Chemistry, University of California, Riverside, CA 92521 United States
AU: Paulson, S
EM: paulson@cloud.atmos.ucla.edu
AF: Department of Atmospheric Sciences, University of California, Los Angeles, CA 90095-1565 United States
AU: Arey, J
EM: janet.arey@ucr.edu
AF: Department of Chemistry, University of California, Riverside, CA 92521 United States
AU: Lurmann, F
EM: fred@sonomatech.com
AF: Sonoma Technology Inc., 1360 Redwood Way, Suite C, Petaluma, CA 94954 United States
AB: Naphthalene is the simplest and most abundant of the polycyclic aromatic hydrocarbons (PAHs). Naphthalene is found primarily in the gas-phase and has been detected in both outdoor and indoor samples. Evaporation from naphthalene-containing products (including gasoline), and during refining operations, are important sources of naphthalene in air. Naphthalene is also emitted during the combustion of fossil fuels and wood, and is a component of vehicle exhaust. Exposure to high concentrations of naphthalene can damage or destroy red blood cells, causing hemolytic anemia. If inhaled over a long period of time, naphthalene may cause kidney and liver damage, skin allergy and dermatitis, cataracts and retinal damage, as well as attack the central nervous system. Naphthalene has been found to cause cancer as a result of inhalation in animal tests. Naphthoquinones are photooxidation products of naphthalene and the potential health effects of exposure to these quinones are a current focus of research. We are developing and applying models that can be used to assess human exposure to naphthalene and its photooxidation products in major air basins such as California South Coast Air Basin (SoCAB). The work utilizes the Surface Meteorology and Ozone Generation (SMOG) airshed model, and the REgional Human EXposure (REHEX) model, including an analysis of individual exposure. We will present and discuss simulations of basin-wide distributions of, and human exposures to, naphthalene and naphthoquinone, with emphasis on the uncertainties in these estimates of atmospheric concentrations and human exposure. Regional modeling of pollutant sources and exposures can lead to cost-effective and optimally health-protective emission control strategies.
DE: 0317 Chemical kinetic and photochemical properties
DE: 0322 Constituent sources and sinks
DE: 0345 Pollution--urban and regional (0305)
DE: 0368 Troposphere--constituent transport and chemistry
DE: 6615 Legislation and regulation
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting