Dry deposition of sulfate to Quercus rubra and Liriodendron tulipifera foliage
Estimates were made of the rate of dry deposition to red oak (Quercus rubra) and tulip poplar (Liriodendron tulipifera) foliage. In the laboratory, radioactive ammonium sulfate aerosols were generated in an exposure chamber. These aerosols were dry deposited onto leaves that were sequentially washed to examine the efficacy of washing procedures in removal of surface deposits. Over 90% of dry deposited sulfate was removed after a 30 second wash duration. Laboratory procedures also estimated the magnitude of foliar sulfur that leached into leaf wash solutions. The majority of laboratory leaves demonstrated no leaching of sulfur from the internal pool. However, some leaves showed significant sulfur leaching. It was concluded that leaching of internal sulfur was highly leaf specific. This indicated that each leaf used in field experiments needed to be individually examined for leaching.
- Research Organization:
- Duke Univ., Durham, NC (USA)
- OSTI ID:
- 6154602
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Atmospheric-- Basic Studies-- Radiometric Techniques-- (-1989)
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560300 -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AEROSOLS
COLLOIDS
DEPOSITION
DISPERSIONS
DISSOLUTION
EXPOSURE CHAMBERS
ISOTOPE APPLICATIONS
LEACHING
MAGNOLIOPHYTA
MAGNOLIOPSIDA
OAKS
OXYGEN COMPOUNDS
PLANTS
POPLARS
RADIOACTIVE AEROSOLS
SEPARATION PROCESSES
SOLS
SULFATES
SULFUR COMPOUNDS
TRACER TECHNIQUES
TREES