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Uptake of sulfuric acid mist by plant canopies. [Exposure chamber studies with maize and soybeans] [electronic resource].

Published
Fort Collins, Colo. : Colorado State University. Department of Civil Engineering, 1979.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: 62 : digital, PDF file
Additional Creators
Colorado State University. Department of Civil Engineering and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Wind tunnel studies and exposure chamber experiments were conducted in the Aerosol Science Laboratory at Colorado State University. Full scale, live plant canopies of 4 to 6 week old corn and soybeans were established in a large wind tunnel. Monodisperse aerosols (1 to 15 ..mu..m aerodynamic diameter) were injected into the tunnel and deposition velocities were determined for wind speeds of 183, 305, and 610 cm/sec. A minimum deposition velocity was seen to occur at 5 ..mu..m. Initially, 4 to 6 week old soybean plants were exposed to hydrated sulfuric acid mist droplets. Unquantified topically applied sulfuric acid mist was applied at a 1% or 10% volumetric concentration of acid to water. The 10% solution produced severe necrotic lesions and large chlorotic regions on the acropetal leaves. A heavy application of the 1% solution produced similar effects but with a reduced number of necrotic lesions. A light application had no visual effects on the plants even after 24 h.In addition, 4 to 6 week old corn and soybeans were placed in a glass exposure chamber. Droplets of pure 18M sulfuric acid mist (1.7 ..mu..m) were injected into the chamber at a rate commensurate with the deposition velocity results. Loading of 107 particles/cm2 were realized during exposure periods up to 10 h per day extending to 14 days total fumigation periods. No visible toxicity symptoms of damage resulted to the plants from these tests conducted at background humidity levels of approximately 40%. Scanning electron microscope observations of the 140 h treated plants showed no apparent damage due to the sulfuric acid mist treatment.
Report Numbers
E 1.99:coo-4367-1
coo-4367-1
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
01/01/1979.
"coo-4367-1"
Wedding, J.B.
Funding Information
EE-77-S-02-4367
View MARC record | catkey: 14151144