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Microbiology and Biotechnology Letters

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Microbiol. Biotechnol. Lett. 2010; 38(3): 329-334

근권세균과 옥수수를 이용한 유류 및 중금속 복합 오염토양의 Rhizoremediation

Rhizoremediation of Petroleum and Heavy Metal-Contaminated Soil using Rhizobacteria and Zea mays

Sun-Hwa Hong , So-Yeon Koo , Sung-Hyun Kim , Hee-Wook Ryu , In-Sook Lee and Kyung-Suk Cho

Department of Environmental Science and Engineering, Ewha Womans University, 1Department of Environmental Science and Engineering, Ewha Womans University, 2Devision of Ecoscience, Ewha Womans University, 3Department of Chemical and Environmental Engineering, Soongsil University, 4Devision of Ecoscience, Ewha Womans University, 5Department of Environmental Science and Engineering, Ewha Womans University

Abstract

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In this study, the rhizoremediation of petroleum and heavy metal-contaminated soil was characterized employing Zea mays and two plant-growth promoting rhizobacteria, Gordonia sp. S2RP-17 and Serratia sp. SY5 which have petroleum-degrading activity and heavy metal-resistance, respectively. After 51 days, the average dry weights of Zea mays' root without and with the inoculation of rhizobacteria were $1.9{pm}0.2$ and $5.6{pm}0.7;g$, respectively. Compared with initial TPH concentration in soil ($21,576{pm}3,426;mg-TPH{cdot}kg-dry;soil^{-1}$), the residual TPH concentrations were $220{pm}98;mg-TPH{cdot}kg-dry;soil^{-1}$ in soil planted with Zea mays, and $20{pm}41;mg-TPH{cdot}kg-dry;soil^{-1}$ in soil planted with Zea mays and inoculated with rhizobacteria. These results indicated that the inoculation of S2RP-17 and SY5 could promote TPH removability in soil as well as the growth of Zea mays' root. There was little positive effect of the rhizobacteria inoculation on the removability of heavy metal such as Cu, Cd and Pb in soil planted with Zea mays.

Keywords: Rhizoremediation, petroleum, heavy metal, Zea mays, plant-growth promoting rhizobacteria

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