"Recent discoveries regarding volatile organic compounds’ (VOCs) fate in phytoremediation have confirmed that diffusion and subsequent volatilization from trees comprise a fundamental transport processes. Diffusion of VOCs through woody plant tissues has direct impact on contaminant fate in phytoremediation. Diffusion studies experiments were conducted to investigate the transport rates of VOCs in wood tissues. Compounds investigated were chlorinated compounds such as trichloroethylene (TCE), perchloroethene (PCE), and tetrachloroethane (TeCA), and aromatic hydrocarbons such as benzene, toluene, and methyl tert-butyl ether (MTBE).
Direct measurement of diffusion rates was carried out on hybrid poplar tree cores (P delotoides X P nigra, clone DN34). Diffusivities were determined by modeling the diffusive transport using one dimensional diffusive flux with appropriate initial and boundary conditions. Diffusivities found to be inversely related to molecular weight of the compounds. The determined diffusivities compare favorably with theory-based predictions, considering wood as a three phase media. Confirming and enhancing the theoretical model, this study opens the door to projecting the potential fate of many volatile and semi volatile compounds that have not been studied explicitly and will increase the understanding and potentially the acceptance of VOC phytoremediation efforts"--Abstract, page iv.
Burken, Joel G. (Joel Gerard)
Frank, Ronald L.
Civil, Architectural and Environmental Engineering
M.S. in Environmental Engineering
National Science Foundation (U.S.)
Midwest Hazardous Substance Research Center
University of Missouri--Rolla
Journal article titles appearing in thesis/dissertation
Direct Measurement of VOC Diffusivities in Tree Tissues: Impacts on Tree-based Phytoremediation
x, 59 pages
© 2006 Krishna Kumar Baduru, All rights reserved.
Thesis - Restricted Access
Partition coefficient (Chemistry)
Volatile organic compounds -- Measurement
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Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.http://merlin.lib.umsystem.edu/record=b5766822~S5
Baduru, Krishna Kumar, "Direct measurement of VOCs diffusivities in tree tissues: Impacts on tree-based phytoremediation" (2006). Masters Theses. 3831.
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