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Evaluation of the Feasibility of Phytoremediation of Soils Contaminated with Cd, Pb and Zn using Sunflower, Corn and Castor plants
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 Title & Authors
Evaluation of the Feasibility of Phytoremediation of Soils Contaminated with Cd, Pb and Zn using Sunflower, Corn and Castor plants
Chae, Mi Jin; Jung, Goo-Bok; Kang, Seong Soo; Kong, Myung Suk; Kim, Yoo Hak; Lee, Deog Bae;
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Phytoremediation is a technology using plants and associated soil microbes to reduce the concentrations or toxic effects of contaminants in the environments. It is regarded as a cost-effective, efficient, eco-friendly, and solar-driven technology with good public acceptance. This study was conducted to find the plants accumulating heavy metals in soils contaminated with Cd and Pb. Experimental plots (plot size: ) was artificially contaminated using a contaminated soil collected from a field in vicinity of Wondong mine (WD). Sunflower, corn and castor were tested for their potential to remove heavy metals from the contaminated soils. The results indicated that sunflower was most effective in accumulating heavy metals and thus remedying the soils among the three crops. Dry weight and heavy metal uptake of sunflower shoot differed with growth period. For example, the Cd content of shoots including leaf and stem were 0.31mg, 2.23 mg, and 0.96 mg per plot at 4, 8 and 12 weeks after planting in Cd4-WD treatment; in addition, the dry weight of the shoots in Cd8-WD treatment was reduced due to heavy metal toxicity. This experiment showed that sunflower absorbed Cd, Pb and Zn in their shoots up to 8 weeks of planting; thereafter heavy metals uptake was diminished. This implies that the efficiency of these plants in cleaning the contaminated soils may be high at the early stage of plant growth.
Phytoremediation;Heavy metals;Sunflower;Mine;Plants;Cadmium;Lead;
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