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Environ Sci Technol

Title:		"Competitive uptake of trichloroethene and 1,1,1-trichloroethane by Eucalyptus camaldulensis seedlings and wood"
Author(s):		Graber ER; Sorek A; Tsechansky L; Atzmon N;
Address:		"Institute of Soil, Water and Environmental Sciences, The Volcani Center, Agricultural Research Organization, P.O.B. 6, Bet Dagan 50250, Israel. ergraber@volcani.agri.gov.il"
Journal Title:		Environ Sci Technol
Year:		2007
Volume:		41
Issue:		19
Page Number:		6704 - 6710
DOI:		10.1021/es070743l
ISSN/ISBN:		0013-936X (Print) 0013-936X (Linking)
Abstract:		"The efficient use of trees for taking up volatile organic compounds (VOCs) from the subsurface for remedial and screening purposes is hampered because many poorly quantified co-occurring processes affect VOC concentrations in the tree, the most basic of which are VOC sorption and uptake by roots. Toward understanding the dominant sorption mechanisms, uptake of trichloroethene (TCE) and 1,1,1-trichloroethane (TCA) by Eucalyptus camaldulensis seedlings was studied in both single-solute and bi-solute experiments. Single-solute and bi-solute sorption experiments on wood from a mature Eucalyptus camaldulensis specimen were also carried out. Competition between TCE and TCA for sorption sites was found in both seedling uptake and wood sorption experiments, indicating that partitioning is not the sole mechanism governing compound interactions in these systems. The nonlinear single-solute sorption isotherms on wood were fit by a dual-mode model including partitioning and Langmuir terms. The dual-mode model calculated parameters were consistent with the results of the bi-solute sorption experiments. As a consequence of competitive sorption processes, uptake of individual compounds may be lower than expected when multiple VOC contaminants are present in the subsurface"
Keywords:		Adsorption Eucalyptus/*metabolism Seedlings/metabolism Soil Pollutants/chemistry/metabolism Trichloroethanes/*chemistry/*metabolism Trichloroethylene/*chemistry/*metabolism Wood/chemistry;
Notes:		"MedlineGraber, E R Sorek, A Tsechansky, L Atzmon, N eng Research Support, Non-U.S. Gov't 2007/11/01 Environ Sci Technol. 2007 Oct 1; 41(19):6704-10. doi: 10.1021/es070743l"