Phytoremediation: Plant Uptake of Atrazine and Role of Root Exudates
Publication: Journal of Environmental Engineering
Volume 122, Issue 11
Abstract
Phytoremediation is an emerging technology for degradation of organic chemicals. The potential of phytoremediation in the cleanup of contaminated sites and prevention of non-point-source pollution was examined with the pesticide atrazine in two experimental systems. Uptake was determined in batch experiments with 14 C ring-labeled atrazine and hybrid poplar trees grown in two soil types. Mineralization was studied utilizing soil microcosms with the addition of root exudates. Results indicate that poplar cuttings were able to uptake the majority of applied atrazine that was not tightly sorbed to the organic fraction of the soil, with no detectable adverse effects to the trees. The addition of root exudate to microcosms showed slight stimulation and the addition of ground-up root biomass revealed large stimulation of mineralization to 14 CO 2 . From experimentally acquired data, a mathematical model was developed to obtain kinetic rate constants. This research indicates that vegetative uptake and degradation in the rhizosphere can play a major role in remediation at hazardous waste sites.
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References
1.
Anderson, T. A. (1992). “Comparative plant uptake and microbial degradation of trichloroethylene in the rhizosphere of five plant species-implications for bioremediation of contaminated surface soils,” PhD dissertation, Univ. of Tennessee, Knoxville, Tenn.
2.
Anderson, T. A., Guthrie, E. A., and Walton, B. T. (1993). “Bioremediation.” Envir. Sci. Technol., 27(3), 2630–2636.
3.
Aprill, W., and Sims, R. C. (1990). “Evaluation of the use of prairie grass for stimulating pah treatment in soil.”Chemosphere, 20(1–2), 253–265.
4.
Bowen, G. D., and Rovira, A. D. (1991). “The rhizosphere.”Plant roots the hidden half, Marcel-Dekker, Inc., New York, N.Y.
5.
Briggs, G. G., Bromilow, R. H., and Evans, A. A.(1982). “Relationships between lipophicity and root uptake and translocation of non-ionized chemicals by barley.”Pesticide Sci., 13, 495–504.
6.
Burken, J. G. (1993). “Vegetative uptake by Populus spp and mineralization of atrazine in variable soil types,” MS thesis, Univ. of Iowa, Iowa City, Iowa.
7.
Curl, E. A., and Truelove, B. (1986). The rhizosphere . Springer-Verlag KG, Berlin, Germany.
8.
McCrady, J. K., McFarlane, C., and Lindstrom, F. T.(1987). “The transport and affinity of substituted benzenes in soybean stems.”J. Experimental Botany, 38(196), 1875–1890.
9.
McFarlane, J. C., Pfleeger, T., and Fletcher, J.(1987). “Transpiration effect on the uptake and distribution of bromacil, nitrobenzene, and phenol in soybean plants.”J. Envir. Quantity, 16(4), 372–376.
10.
McFarlane, J. C., Pfleeger, T., and Fletcher, J.(1990). “Effect, uptake and distribution of nitrobenzene in several terrestrial plants.”Envir. Toxicological Chem., 9, 513–520.
11.
Moser, M., and Haselwandter, K. (1983). “Ecophysiology of mycorrhizal symbiosis.”Physiological plant ecology III: responses to the chemical and plant environment, Springer-Verlag KG, Berlin, Germany.
12.
Nair, D. R., Burken, J. G., Licht, L. A., and Schnoor, J. L.(1993). “Mineralization and uptake of triazine pesticide in soil-plant systems.”J. Envir. Engrg., ASCE, 119(5), 842–854.
13.
Nair, D. R., and Schnoor, J. L.(1994). “Effect of soil conditions on model parameters and atrazine mineralization rates.”Water Res., 28(5), 1199–1205.
14.
Scheunert, I. (1992). “Fate of pesticides in plants and in soil fauna.”Chemistry of plant protection 8, Springer-Verlag KG, Berlin, Germany.
15.
Schnoor, J. L., Licht, L. A., McCutcheon, S. C., Wolf, N. L., and Carreira, L. H. (1995). “Phytoremediation of organic and nutrient contaminants.”Envir. Sci. Technol., 29(7), 318A–323A.
16.
Schwartz, P. (1991). “Effect of poplar trees on fate of atrazine in a model tree system through metabolism, degradation and accumulation,” MS thesis, Univ. of Iowa, Iowa City, Iowa.
17.
Shimp, J. F., Tracy, J. C., Davis, L. C., Lee, E., Huang, W., Erickson, L. E., and Schnoor, J. L.(1993). “Beneficial effects of plants in the remediation of soil and groundwater contaminated with organic materials.”Envir. Sci. Technol., 23(1), 41–77.
18.
Trapp, S., McFarlane, C., and Matthies, M.(1994). “Model for uptake of xenobiotics into plants: validation with bromacil experiments.”Envir. Toxicological Chem., 13(3), 413–422.
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Copyright © 1996 American Society of Civil Engineers.
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Published online: Nov 1, 1996
Published in print: Nov 1996
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