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http://dx.doi.org/10.5012/bkcs.2012.33.8.2737

A Comparison of Electrical Stimulation for Electrodic and EDTA-Enhanced Phytoremediation of Lead using Indian Mustard (Brassica juncea)  

Lim, Jae-Min (Department of Chemistry, Changwon National University)
Jin, Biao (Instrumental Analysis Center, Yanbian University)
Butcher, David J. (Department of Chemistry and Physics, Western Carolina University)
Publication Information
Bulletin of the Korean Chemical Society / v.33, no.8, 2012 , pp. 2737-2740 More about this Journal
Abstract
The use of plants to remove toxic metals from soil (phytoremediation) is emerging as a cost-effective alternative to conventional methods for the removal of heavy metals from contaminated soil. Indian mustard (Brassica juncea) was used as the plant to accumulate high tissue concentrations of lead when grown in contaminated soil. For this study, the application of an electric field combined effectively with EDTA-enhanced phytoremediation. A stimulation of direct and alternating electric potential was compared and EDTA-enhanced phytoremediation of lead using Indian mustard has been performed. The effects of experimental parameters such as operating voltage with different concentration of EDTA, the number of graphite electrodes, and cultivation period on the removal of toxic metal were studied. Shoot lead accumulations in Indian mustard increased as the concentration of EDTA and dc electric potential was increased. Two to four folds was increased when EDTA plus a dc electric potential was applied, compared to an ac electric potential. The maximum lead accumulation in the shoots was achieved by applying EDTA plus dc electric potential with 6 graphite electrodes.
Keywords
Phytoremediation; Lead; Indian mustard; Electrodics; EDTA;
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