Record Display for the EPA National Library Catalog

RECORD NUMBER: 4 OF 4

Main Title Uptake and Photodegradation of 2,3,7,8-Tetrachlorodibenzo-p-dioxin Sorbed to Grass Foliage.
Author McCrady, J. K. ; Maggard., S. P. ;
CORP Author Corvallis Environmental Research Lab., OR. ;ManTech Environmental Technology, Inc., Corvallis, OR.
Publisher c1993
Year Published 1993
Report Number EPA/600/J-94/162;
Stock Number PB94-160488
Additional Subjects Sunlight ; Dioxin ; Photodegradation ; Grasses ; Vapor phases ; Herbicides ; Vegetation ; Ultraviolet radiation ; Volatility ; Sorption ; Exposure ; Humans ; Contamination ; Darkness ; Mathematical models ; Half life ; Furans ; Dioxin/Tetrachloro dibenzo ; Air to vegetation bioconcentration ; Plant uptake ; Ultraviolet B radiation
Holdings
Library Call Number Additional Info Location Last
Modified		 Checkout
Status
NTIS  PB94-160488 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 10p
Abstract
Plant uptake rates were determined for airborne 2,3,7,8-TCDD using grass foliage. The primary elimination mechanisms for 2,3,7,8-TCDD from grass, photodegradation and volatility, were measured in natural sunlight, filtered sunlight which reduced UV-B radiation, and in the dark. Rapid sorption of 2,3,7,8-TCDD vapor to grass resulted in an initial uptake rate constant of 1750/h(-1). Photodegradation of 2,3,7,8-TCDD and volatility of 2,3,7,8-TCDD from the foliage back into the air were both significant elimination mechanisms. The rapid photodegradation of 2,3,7,8-TCDD sorbed to grass indicates this elimination mechanism should be considered when estimating plant contamination from 2,3,7,8-TCDD. (Copyright (c) 1993 by the American Chemical Society.)