ISSN:
1573-2932
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
Notes:
Abstract Trace organic compounds were measured in air and rainfall at a rural site in Texas. Chlorinated hydrocarbons and phthalic acid esters (PAEs) were present at concentrations of ng m−3 in air and ng L−1 in precipitation. The most abundant compounds measured in air were PAEs 〉 toxaphene 〉 chlordane 〉 hexachlorocyclohexanes (HCHs) 〉 others. In rainfall the concentration order was PAEs 〉 toxaphene 〉 HCHs 〉 DDTs 〉 chlordane 〉- PCBs 〉 others. An inverse correlation between concentration and rainfall amount was observed for most compounds. A model of precipitation scavenging of these compounds considered both scavenging of gas-phase and particle-bound compounds from the atmosphere. Good agreement was obtained between theoretical and measured concentrations. Results indicate that scavenging of a small amount of particle-bound compound can account for 〉98% of wet deposition for insoluble organic pollutants. Gas-phase scavenging is important for the more soluble compounds such as HCH.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00279583
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