Masters Theses

Title

Direct measurement of VOCs diffusivities in tree tissues: impacts on tree-based phytoremediation

Abstract

"Recent discoveries regarding volatile organic compounds-' (VOCs) fate in phytoremediation have confirmed that diffusion and subsequent volatilization from trees comprise a fundamental transport process. 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, close 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"--Abstract, leaf iv.

Advisor(s)

Burken, Joel G. (Joel Gerard)

Committee Member(s)

Frank, Ronald L.
Morrison, Glenn

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Environmental Engineering

Sponsor(s)

Midwest Hazardous Substance Research Center
National Science Foundation (U.S.)

Publisher

University of Missouri--Rolla

Publication Date

Spring 2006

Pagination

x, 59 leaves

Note about bibliography

Includes bibliographical references (pages 53-54).

Rights

© 2006 Krishna Kumar Baduru, All rights reserved.

Document Type

Thesis - Citation

File Type

text

Language

English

Library of Congress Subject Headings

Partition coefficient (Chemistry)
Phytoremediation
Volatile organic compounds -- Measurement
Xylem

Thesis Number

T 8914

Print OCLC #

79473124

Link to Catalog Record

Full-text not available: Request this publication directly from Missouri S&T Library or contact your local library.

http://laurel.lso.missouri.edu/record=b5766822~S5

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