Loss of Fine Particle Ammonium from Denuded Nylon Filters

Journal Article · Tue Aug 01 04:00:00 EDT 2006 · Atmospheric Environment, 40(25):4797-4807

DOI:https://doi.org/10.1016/j.atmosenv.2006.03.061· OSTI ID:909252

Yu, Xiao-Ying; Lee, Taehyoung; Ayres, Benjamin; Kreidenweis, Sonia M; Malm, William C; Collett, Jeffrey L

Ammonium is an important constituent of fine particulate mass in the atmosphere, but can be difficult to quantify due to possible sampling artifacts. Losses of semivolatile species such as NH4NO3 can be particularly problematic. In order to evaluate ammonium losses from aerosol particles collected on filters, a series of field experiments was conducted using denuded nylon and Teflon filters at Bondville, Illinois (February 2003), San Gorgonio, California (April 2003 and July 2004), Grand Canyon National Park, Arizona (May, 2003), Brigantine, New Jersey (November 2003), and Great Smoky Mountains National Park (NP), Tennessee (July–August 2004). Samples were collected over 24-hr periods. Losses from denuded nylon filters ranged from 10% (monthly average) in Bondville, Illinois to 28% in San Gorgonio, California in summer. Losses on individual sample days ranged from 1% to 65%. Losses tended to increase with increasing diurnal temperature and relative humidity changes and with the fraction of ambient total N(--III) (particulate NH4+ plus gaseous NH3) present as gaseous NH3. The amount of ammonium lost at most sites could be explained by the amount of NH4NO3 present in the sampled aerosol. Ammonium losses at Great Smoky Mountains NP, however, significantly exceeded the amount of NH4NO3 collected. Ammoniated organic salts are suggested as additional important contributors to observed ammonium loss at this location.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 909252
• Report Number(s): PNNL-SA-51276; KP1205030
• Journal Information: Atmospheric Environment, 40(25):4797-4807, Journal Name: Atmospheric Environment, 40(25):4797-4807 Journal Issue: 25 Vol. 40; ISSN ATENBP; ISSN 0004-6981
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AEROSOLS
AIR SAMPLERS
AMMONIUM NITRATES
ATMOSPHERIC CHEMISTRY
ECOLOGICAL CONCENTRATION
FILTERS
IMPROVE
LOSSES
NYLON
PARTICULATES
PM2.5
SAMPLING
TEFLON
ammonia
ammonium nitrate
annular denuder
nylon filter
teflon filter