Econ. Environ. Geol. 2010; 43(2): 101-107

Published online April 30, 2010

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Enhanced Phytoremediation by Echinochloa crus-galli in Arsenic Contaminated Soil in the Vicinity of the Abandoned Mine

Ji-Yeon Park1, Ju-Yong Kim1, Byung-Tae Lee1, Kyoung-Woong Kim1* and Jin-Soo Lee2

1Department of Environmental Science and Engineering, GIST, Gwangju 500-712, Korea
2Mine Reclamation Corp., Seoul 110-727, Korea

Correspondence to :

Kyoung-Woong Kim

kwkim@gist.ac.kr

Received: November 18, 2009; Accepted: March 10, 2010

Abstract

<p>In order to deal with the problem that phytoremediation takes long time in achieving the practical effect, the enhanced phytoremediation by Barnyard grass (Echinochloa crus-galli) was conducted. In addition, we examined the synergistic effect by adding PSM (phosphate -solubilizing microbes) and EDTA (ethylenediaminetetraacetic acid) to the arsenic contaminated soil in the vicinity of the abandoned mine. The removal efficiency of arsenic in the site with PSM application increased about 16% when compared to control site, which was due to increase of plant biomass. The EDTA has been successfully utilized in respect of enhanced mobility and solubility of arsenic in the soil. As a result, BF (bioaccumulation factor) significantly increased but the inhibition of plant growth resulted in 20% reduction of arsenic removal efficiency. The application of PSM and EDTA may enhance the efficiency of phytoremediation. However, the time and method of EDTA application should be further examined to reach the maximum removal efficiency.

Keywords Echinochloa crus-galli, phytoremediation, arsenic, PSM, EDTA

Article

Econ. Environ. Geol. 2010; 43(2): 101-107

Published online April 30, 2010

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Enhanced Phytoremediation by Echinochloa crus-galli in Arsenic Contaminated Soil in the Vicinity of the Abandoned Mine

Ji-Yeon Park1, Ju-Yong Kim1, Byung-Tae Lee1, Kyoung-Woong Kim1* and Jin-Soo Lee2

1Department of Environmental Science and Engineering, GIST, Gwangju 500-712, Korea
2Mine Reclamation Corp., Seoul 110-727, Korea

Correspondence to:

Kyoung-Woong Kim

kwkim@gist.ac.kr

Received: November 18, 2009; Accepted: March 10, 2010

Abstract

In order to deal with the problem that phytoremediation takes long time in achieving the practical effect, the enhanced phytoremediation by Barnyard grass (Echinochloa crus-galli) was conducted. In addition, we examined the synergistic effect by adding PSM (phosphate -solubilizing microbes) and EDTA (ethylenediaminetetraacetic acid) to the arsenic contaminated soil in the vicinity of the abandoned mine. The removal efficiency of arsenic in the site with PSM application increased about 16% when compared to control site, which was due to increase of plant biomass. The EDTA has been successfully utilized in respect of enhanced mobility and solubility of arsenic in the soil. As a result, BF (bioaccumulation factor) significantly increased but the inhibition of plant growth resulted in 20% reduction of arsenic removal efficiency. The application of PSM and EDTA may enhance the efficiency of phytoremediation. However, the time and method of EDTA application should be further examined to reach the maximum removal efficiency.

Keywords Echinochloa crus-galli, phytoremediation, arsenic, PSM, EDTA

    KSEEG
    Jun 30, 2024 Vol.57 No.3, pp. 281~352

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