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Li Mengjie, Wang Cuiling, Li Rongchun, Hong Junyan, Yan Liang, Liu Li, Zhuang Li. Microorganism remediation of Hg, Pb and Cr contaminated soil[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1568-1572.
Citation: Li Mengjie, Wang Cuiling, Li Rongchun, Hong Junyan, Yan Liang, Liu Li, Zhuang Li. Microorganism remediation of Hg, Pb and Cr contaminated soil[J]. Chinese Journal of Environmental Engineering, 2013, 7(4): 1568-1572.
shu

Microorganism remediation of Hg, Pb and Cr contaminated soil

  • 1.

    Institute of Edible Fungi,Yunnan Agricultural University,Kunming 650201,China

  • 2.

    Puer Dian Hongjun Biotechnology Technology Development Co. Ltd., Puer 665000,China

  • 3.

    Puer Institute of Pu-Erh Tea,Puer 665000,China

  • Received Date: 27/06/2012
    Accepted Date: 21/02/2012
    Available Online: 09/04/2013
    Fund Project:
  • The strain GGHN08-116 of Schizophyllum commune was applied to remedy heavy metal (Hg, Pb and Cr) contaminated soil by using cottonseed-hulls and corn stalks as solid fermentation substrates. Through the growth and penetration of fungal hyphae in the soil, the contents of exchangeable heavy metal ions,and the fungal ability for accumulating these ions in contaminated soil were studied. Furthermore, by applying the solid fermentation substrates on contaminated soil in pots which planted carrots, the contents of Hg, Pb and Cr ions in soil and the quality and yield of carrot roots were observed. The results showed that the strain could penetrate into soil to 5 cm deep, and produce fruit bodies. The pH of treated soil was lower than the control, but with no significant differences. The contents of exchangeable Hg and Cr ions decreased significantly, but the contents of Pb had no significant differences compared to the control. Except Hg, the amounts of exchangeable Pb and Cr ions in the fungal fruit bodies were in excess of the specified standards GB 7096-2003 and GB 2762-2005. After the solid fermentation treatment, the contents of exchangeable Hg, Pb and Cr ions in soil significantly decreased; the Hg and Pb ions were not detected in the carrot roots and stalks, and the Cr contents in carrot were corresponded with the specified standard GB 2762-2005. Therefore, the strain GGHN08-116 and its solid fermentation products is able to remedy the Hg, Pb and Cr contaminated soil.
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Microorganism remediation of Hg, Pb and Cr contaminated soil

  • Received Date: 27/06/2012
  • Accepted Date: 21/02/2012
  • Available Online: 09/04/2013
Fund Project:

Abstract: The strain GGHN08-116 of Schizophyllum commune was applied to remedy heavy metal (Hg, Pb and Cr) contaminated soil by using cottonseed-hulls and corn stalks as solid fermentation substrates. Through the growth and penetration of fungal hyphae in the soil, the contents of exchangeable heavy metal ions,and the fungal ability for accumulating these ions in contaminated soil were studied. Furthermore, by applying the solid fermentation substrates on contaminated soil in pots which planted carrots, the contents of Hg, Pb and Cr ions in soil and the quality and yield of carrot roots were observed. The results showed that the strain could penetrate into soil to 5 cm deep, and produce fruit bodies. The pH of treated soil was lower than the control, but with no significant differences. The contents of exchangeable Hg and Cr ions decreased significantly, but the contents of Pb had no significant differences compared to the control. Except Hg, the amounts of exchangeable Pb and Cr ions in the fungal fruit bodies were in excess of the specified standards GB 7096-2003 and GB 2762-2005. After the solid fermentation treatment, the contents of exchangeable Hg, Pb and Cr ions in soil significantly decreased; the Hg and Pb ions were not detected in the carrot roots and stalks, and the Cr contents in carrot were corresponded with the specified standard GB 2762-2005. Therefore, the strain GGHN08-116 and its solid fermentation products is able to remedy the Hg, Pb and Cr contaminated soil.

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