Abstract
White rot fungi have been extensively reported to have strong adsorption capacity to heavy metal ions, whereas the knowledge of extracellular polymeric substances (EPS) from the fungus has been rarely involved. In this study, the contribution characteristics of ‘the in situ EPS in Phanerochaete chrysosporium to Pb immobilization were investigated. First of all, the component and amount of EPS were investigated. It was found that the main component of EPS was carbohydrates, and highest EPS amount was produced at 5 days. In the Pb2+ immobilization experiments, EPS was demonstrated to play a more important role in immobilizing Pb2+ at lower initial Pb concentration. pH increase was beneficial for EPS to immobilize Pb. Higher EPS amount increased the Pb removal efficiency at a certain extent, while the specific uptake decreased. The Pb2+ immobilization by EPS produced at 7 days was most successful.
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Acknowledgements
The study was jointly supported by the National Natural Science Foundation of China (51608142 and 51638006), the Natural Science Foundation of Guangxi Province (2016GXNSFBA380076), and the Foundation of Guilin University of Technology. We are also grateful for the help from Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, and Guangxi Scientific Experiment Center of Mining, Metallurgy and Environment.
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Li, N., Zhang, X., Wang, D. et al. Contribution characteristics of the in situ extracellular polymeric substances (EPS) in Phanerochaete chrysosporium to Pb immobilization. Bioprocess Biosyst Eng 40, 1447–1452 (2017). https://doi.org/10.1007/s00449-017-1802-2
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DOI: https://doi.org/10.1007/s00449-017-1802-2