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Phytoremediation Study of Disel Contaminated Soil by Indigenous Poplar Tree  

Chaog Soon-Woong (Department of Environmental Engineering, Kyonggi University)
Publication Information
Journal of Soil and Groundwater Environment / v.11, no.5, 2006 , pp. 51-58 More about this Journal
Abstract
In this study, uptake and toxicity of disel (TPH) by poplar specie, $P.\;nigra{\times}P.\;maximowiczii$ were assessed in laboratory soil column experiments. Poplar cuttings were grown for 2 months and exposed to various concentration (0, 200, 500, 1000, 2000 mg/kg) of disel for a period of 60 days. For disel removal experiments, disel was effectively removed in the range of lower concentration. but, the removal rate of disel was rapidly decreased as increasing initial disel concentrations. For the this reason, toxicity effetcs were evaluated by measuring in poplar cutting mass variation and monitoring transpiration. Exposure on higher disel concentration resulted in decrease of biomass and transpiration accompanied by chlorosis and abscission, indicating toxic effect of disel on the poplar tree. And also, we have observed that both removal efficiency of disel and the microbial activity were higher at the bottom of the soil column. It was suggested that the plant formed the root zone at contaminated soil, stimulated microbial activity by plant root exudates, and played an important role in enhanced biodegradation of disel.
Keywords
Phytoremediation; Disel; Poplar tree; $P.\; nigra{\times}P.\; maximowiczii$;
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