Plants can interact with a variety of organic compounds, and thereby affect the fate and transport of many environmental contaminants. Volatile organic compounds may be volatilized from stems or leaves (direct phytovolatilization) or from soil due to plant root activities (indirect phytovolatilization). Fluxes of contaminants volatilizing from plants are important across scales ranging from local contaminant spills to global fluxes of methane emanating from ecosystems biochemically reducing organic carbon. In this article past studies are reviewed to clearly differentiate between direct- and indirect-phytovolatilization and we discuss the plant physiology driving phytovolatilization in different ecosystems. Current measurement techniques are also described, including common difficulties in experimental design. We also discuss reports of phytovolatilization in the literature, finding that compounds with low octanol-air partitioning coefficients are more likely to be phytovolatilized (log KOA < 5). Reports of direct phytovolatilization at field sites compare favorably to model predictions. Finally, future research needs are presented that could better quantify phytovolatilization fluxes at field scale.
M. Limmer and J. G. Burken, "Phytovolatilization of Organic Contaminants," Environmental Science and Technology, vol. 50, no. 13, pp. 6632-6643, American Chemical Society (ACS), Jul 2016.
The definitive version is available at https://doi.org/10.1021/acs.est.5b04113
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Carbon; Contamination; Ecology; Ecosystems; Impurities; Organic compounds; Plants (botany); Volatile organic compounds; Environmental contaminant; Fate and transport; Measurement techniques; Model prediction; Organic contaminant; Partitioning coefficients; Plant physiology; Research needs; Organic carbon; Aniline; Atrazine; Benzene; Ethylbenzene; Meta xylene; Methane; Naphthalene; Nitrobenzene; Octanol; Pentachlorophenol; Phenol; Soil; Soil pollutants; Experimental design; Literature review; Partition coefficient; Physiological response; Pollutant; Research work; Root system; Volatile substance; Air; Controlled study; Ecosystem; Nonhuman; Plant leaf; Plant root; Plant stem; Review; Volatilization; Plants; Acacia koa; Ecosystem; Plant Roots
International Standard Serial Number (ISSN)
Article - Journal
© 2016 American Chemical Society (ACS), All rights reserved.
01 Jul 2016