Phytoremediation of a Perchloroethylene Contaminated Site in LaSalle, Illinois, with Populus Clones- A Field Evaluation. JG Isebrands 1 , DL Rockwood 2 , RB Hall 3 , AS Lindner 2 , A Pacheco 2 , N Brown 4 , and RM Lange 5
Phytoremediation of a Perchloroethylene Contaminated Site in LaSalle, Illinois,
with Populus Clones- A Field Evaluation
JG Isebrands1, DL Rockwood2, RB Hall3, AS Lindner2,A Pacheco2, N Brown4, and RM Lange5
1Environmental Forestry Consultants, New London, WI 54961, [email protected], 2University of Florida, Gainesville, FL 32611, 3Iowa State University, Ames, IA 50011,
4Ecology and Environment, Chicago, IL 60602, 5Illinois Environmental Protection Agency, LaSalle, IL 61301
Populus trees are being used throughout North America for phytoremediation (phyto) of chlorinated solvent contaminated soil and groundwater. Much of the phyto work has been with only a few poplar clones including the clone Eugenei (DN-34). One of the challenges of phyto is to find the proper clone for the specific site through field evaluations. Another challenge is to find non-destructive field methods for assessing solvent uptake.
The former LaSalle Electric Utilities site in LaSalle, IL has an perchloroethylene (PCE) contaminated plume of soil and groundwater. Our work is focused on evaluating the effectiveness of using phyto with poplar clones at the LaSalle site.
MATERIALS AND METHODS
Fig 1.Enumeration of microorganisms in rhizosphere soil and in/on roots of Poplar I 45/51 trees. PCE site, LaSalle.
*At low [PCE] depths of 30 to 90 cm no roots were observed.
Table 2. Comparison of poplar clones at LaSalle for 20 month height (H, m), DBH (cm), and D2H (dm3) at LaSalle, percent of Eugenei 20 month D2H at LaSalle, percent of Eugenei tree volume regionally, Melampsora leaf rust incidence at LaSalle in 2002 and relative incidence regionally (N=none, L=light, M=moderate), freeze incidence (T=trace, M=moderage, S=severe) at LaSalle in 2002, and estimated water uptake (L(gal) at LaSalle in 2003
Table 1. Identity, pedigree, and origin of 18 poplar clones under evaluation at LaSalle Electric Utilities, LaSalle, IL site
7300501P. deltoidesSouthern Illinois
119.16P. deltoidesOhio x (Nebraska x Minnesota)
252-4P. deltoidesCentral Missouri
42-7P. deltoidesSouthern Indiana
51-5P. deltoidesSouthern Ohio
80x00601P. deltoidesSouthern Illinois x Southern Illinois
80x01015P. deltoidesSouthern Illinois x Southern Illinois
80x01107P. deltoidesSouthern Illinois x Southern Illinois
ISU 25-21P. deltoidesSouthern Illinois x Southern Illinois
ISU 25-35P. deltoidesSouthern Illinois x Southern Illinois
ISU 25-R4P. deltoidesSouthern Illinois x Southern Illinois
ISU 25-R5P. deltoidesSouthern Illinois x Southern Illinois
EugeneiP. deltoides x P. nigraNorth America x Europe
I45/51P. deltoides x P. nigraNorth America x Europe
Belgian 25P. nigra x P. maximowicziiEurope x Japan
NM-2P. nigra x P. maximowicziiEurope x Japan
CrandonP. alba x P. grandidentataEurope x Southern Iowa
and less on the concentrated plume