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VAPOR-PHASE 2,3,7,8-TCDD SORPTION TO PLANT FOILAGE - A SPECIES COMPARISON
Citation:
McCrady, J. VAPOR-PHASE 2,3,7,8-TCDD SORPTION TO PLANT FOILAGE - A SPECIES COMPARISON. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-94/163 (NTIS PB94160496).
Description:
Plant uptake rate constants (k1) were determined for vapor-phase 2,3,7,8-TCDD using grass, azalea, spruce, kale and pepper foliage, and the fruit from apple, tomato and pepper. lants were exposed to vapor-phase 3H-2,3,7,8-TCDD for 96 h, and the TCDD sorption rate constant for each plant species was determined from measured air and plant concentration. orption rate constants for the different plant tissues, expressed on a fresh weight basis, varied by two orders of magnitude. he rate constants were normalized for the exposed plant surface area (SA) by dividing kFwt by the SA/FWT ratio for each plant species. ormalizing the rate constants for exposed surface area resulted in significantly less variation between species. he cuticular wax content of the different plant species did not effect the short-term sorption kinetics of 2,3,7,8-TCDD.