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46UPTAKE AND VOLATILIZATION OF ORGANIC COMPOUNDS BY HYBRID POPLARS |
J G. Burkenl and J. L.Schnoor2, 1Department of Civil Engineering, University of Missouri-Rolla, Rolla, Missouri 65409, 2Department of Civil and Environmental Engineering, University of Iowa, Iowa City, Iowa 52242 |
In several pilot-scale studies the efficacy of phytoremediation is currently being tested by establishing vegetation on contaminated sites. In some instances these sites are contaminated with volatile organic compounds (VOCs) or with a mixture of wastes that may include these compounds. In some situations this may be an acceptable treatment option aiding the remediation of subsurface contamination. In other cases, the transport of these compounds to the atmosphere may not be acceptable and may preclude the use of phytoremediation.
Experiments described here investigated the movement and fate of VOCs within the tissues of hybrid poplar trees, and the potential for phytoremediation of VOC-contaminated sites. Results suggest that the use of poplar trees for phytoreme-diation of compounds (benzene, toluene, ethylbenzene, and xylene isomer) and other volatile organic compounds (TCE and chlo-rinated benzenes) has potential to transport VOCs to the surrounding atmosphere.
Key words: VOCs, BTEX, phytoremediation, poplar
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