Bacterial-Assisted Immobilization of Lead in Soils : Implications for Remediation(Symposium 3.5.1 Heavy Metal Contaminated Soils,<Special Issue>International Symposium: Soil Degradation Control, Remediation, and Reclamation, Tokyo Metropolitan University Symposium Series No.2, 2010)

DOI Web Site 参考文献93件
  • PARK Jin Hee
    Centre for Environmental Risk Assessment and Remediation, University of South Australia:Cooperative Research Centre for Contamination Assessment and Remediation of the Environment
  • BOLAN Nanthi
    Centre for Environmental Risk Assessment and Remediation, University of South Australia:Cooperative Research Centre for Contamination Assessment and Remediation of the Environment
  • MEGHARAJ Mallavarapu
    Centre for Environmental Risk Assessment and Remediation, University of South Australia:Cooperative Research Centre for Contamination Assessment and Remediation of the Environment
  • NAIDU Ravi
    Centre for Environmental Risk Assessment and Remediation, University of South Australia:Cooperative Research Centre for Contamination Assessment and Remediation of the Environment
  • CHUNG Jae Woo
    Department of Environmental Engineering, Gyeongnam National University of Science and Technology

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  • Bacterial-assisted immobilization of lead in soils: implications for remediation

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A large number of sites throughout the world are contaminated by heavy metals, which represents a significant threat to both the environment and human health. Lead (Pb) contamination in particular can cause toxic effects to plants, animals, and humans. Lead reacts in soil through sorption, complexation, and precipitation processes, which lead to its immobilization in soil. This review examines the role of bacteria in the immobilization of Pb and includes a case study examining phosphate-solubilizing bacteria-assisted Pb immobilization using insoluble phosphate compounds. Soil bacteria are capable of directly and indirectly contributing to Pb immobilization by a number of mechanisms, including biosorption and accumulation of metals by bacterial cells, complexation by extracellular polymers and protein substances, and precipitation of Pb by phosphate, sulfide, hydroxide, or carbonate. In addition, phosphate-solubilizing bacteria ameliorate Pb toxicity by dissolution of insoluble rock phosphate and subsequent immobilization of Pb.

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