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Tolerance and Removal Mechanisms of Heavy Metals by Fungus Pleurotus ostreatus Haas

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Abstract

Fungus Pleurotus ostreatus Haas can tolerate and remove heavy metals from water. Among three heavy metals tested, the removal of Pb was the most efficient (99.9–100.0%), followed by Cd (45.9–61.1%), and Cr (29.4–64.5%). The uptake of heavy metals by the fungus varied and was dependent on the element. Pb was found to be transported primarily into the fungal cell wall (68.2–91.2% of the total), which was much higher than the insoluble form (20.1–32.7%), and the maximum intracellular concentration of Pb was found to be 119,830.4 mg kg−1. In the cases of Cd and Cr, their insoluble forms were the main products of the reaction with the fungus, which accounted for 30.0–39.1 and 19.6–37.4% of the total. P. ostreatus Haas produces oxalic acid, and this production is stimulated by Pb and Cr but inhibited by Cd. Parallel experimental results indicated that the concentration of the soluble metals in solution decreased with the increase of oxalic acid, which further suggested that oxalic acid played a partial role in the removal of the soluble heavy metals by chelation. These results revealed that this species of fungus has a variety of response mechanisms to the presence of heavy metals in solution.

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Acknowledgements

The work was financially supported by the Project of Science and Technology Project of Henan Province (152102310021), 2013 Annual Plan of Scientific Research and Technology Development Projects, Henan Tobacco Company (HYKJM201306), the National Natural Science Foundation of China (41401350), and the Foundation by Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences (SEPR2014-05).

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Authors and Affiliations

  1. College of Resources and Environmental Sciences, Henan Agricultural University, Zhengzhou, 450002, China

    Suqin Yang & Xiaoxue Sun

  2. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China

    Suqin Yang & Xuanzhen Li

  3. Xuchang Environmental Monitoring Center, Xuchang, 461099, China

    Yanping Shen

  4. Henan Provincial Corporation of China National Tobacco Corporation, 450018, Zhengzhou, China

    Cheng Chang

  5. College of Forestry, Henan Agricultural University, Zhengzhou, 450002, China

    Erhui Guo, Yong Zhao & Xuanzhen Li

  6. Industrial Crop Research Institute, Henan Academy of Agricultural Sciences, Zhengzhou, 450002, China

    Guixiao La

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  1. Suqin Yang
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  2. Xiaoxue Sun
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  3. Yanping Shen
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  4. Cheng Chang
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  5. Erhui Guo
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  6. Guixiao La
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  7. Yong Zhao
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  8. Xuanzhen Li
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Correspondence to Yong Zhao or Xuanzhen Li.

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Yang, S., Sun, X., Shen, Y. et al. Tolerance and Removal Mechanisms of Heavy Metals by Fungus Pleurotus ostreatus Haas . Water Air Soil Pollut 228, 130 (2017). https://doi.org/10.1007/s11270-016-3170-y

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  • DOI: https://doi.org/10.1007/s11270-016-3170-y

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