Econ. Environ. Geol. 2009; 42(5): 435-444

Published online October 31, 2009

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Removal of Dissolved Heavy Metals through Biosorption onto Indigenous Bacterial Biofilm Developed in Soil

Sang-Ho Kim1, Hyo-Taek Chon2* and Jong-Un Lee3

1STX Energy Co. Ltd, STX Namsan Tower, Seoul 100-958, Korea
2Department of Energy Resources Engineering, Seoul National University, Seoul 151-744, Korea
3Department of Energy and Resources Engineering, Chonnam National University, Gwangju 500-757, Korea

Correspondence to :

Hyo-Taek Chon

chon@snu.ac.kr

Received: August 20, 2009; Accepted: October 5, 2009

Abstract

In situ stabilization of heavy metals through adsorption onto indigenous bacterial biofilm developed on soil particles was investigated. Biofilms were developed in soil columns by supply of various carbon sources such as acetate, lactate and glucose. During development of biofilms, acetate, lactate, and glucose solutions were flew out from the soil columns with volume ratios of 98.5%, 97.3%, and 94.7%, respectively, when compared with soil column supplied with deionized water. Decrease in effluent amounts through the soil columns amended with carbon sources over time indicated the formation of biofilms resulting in decrease of soil porosity. Solutions of Cd, Cr(VI), Cu, Pb, and Zn were injected into the biofilms supported on soil particles in the columns, and the dissolved heavy metals in effluents were determined. Concentrations of dissolved Cd, Cr(VI), Cu, and Zn in the effluents through biofilm columns were lower than those of control column supplied with deionized water. The result was likely due to enhanced adsorption of the metals onto biofilms. Efficiency of metal removal by biofilms depended on the type of carbon sources supplied. The enhanced removal of dissolved heavy metals by bacterial biofilms in this study may be effectively applied to technical development of in situ stabilization of heavy metals in natural soil formation contaminated with heavy metals.

Keywords biofilm, biosorption, heavy metals, indigenous bacteria, in situ stabilization

Article

Econ. Environ. Geol. 2009; 42(5): 435-444

Published online October 31, 2009

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Removal of Dissolved Heavy Metals through Biosorption onto Indigenous Bacterial Biofilm Developed in Soil

Sang-Ho Kim1, Hyo-Taek Chon2* and Jong-Un Lee3

1STX Energy Co. Ltd, STX Namsan Tower, Seoul 100-958, Korea
2Department of Energy Resources Engineering, Seoul National University, Seoul 151-744, Korea
3Department of Energy and Resources Engineering, Chonnam National University, Gwangju 500-757, Korea

Correspondence to:

Hyo-Taek Chon

chon@snu.ac.kr

Received: August 20, 2009; Accepted: October 5, 2009

Abstract

In situ stabilization of heavy metals through adsorption onto indigenous bacterial biofilm developed on soil particles was investigated. Biofilms were developed in soil columns by supply of various carbon sources such as acetate, lactate and glucose. During development of biofilms, acetate, lactate, and glucose solutions were flew out from the soil columns with volume ratios of 98.5%, 97.3%, and 94.7%, respectively, when compared with soil column supplied with deionized water. Decrease in effluent amounts through the soil columns amended with carbon sources over time indicated the formation of biofilms resulting in decrease of soil porosity. Solutions of Cd, Cr(VI), Cu, Pb, and Zn were injected into the biofilms supported on soil particles in the columns, and the dissolved heavy metals in effluents were determined. Concentrations of dissolved Cd, Cr(VI), Cu, and Zn in the effluents through biofilm columns were lower than those of control column supplied with deionized water. The result was likely due to enhanced adsorption of the metals onto biofilms. Efficiency of metal removal by biofilms depended on the type of carbon sources supplied. The enhanced removal of dissolved heavy metals by bacterial biofilms in this study may be effectively applied to technical development of in situ stabilization of heavy metals in natural soil formation contaminated with heavy metals.

Keywords biofilm, biosorption, heavy metals, indigenous bacteria, in situ stabilization

    KSEEG
    Apr 30, 2024 Vol.57 No.2, pp. 107~280

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