白腐真菌（Phanerochaete chrysosporium）原位胞外聚合物（EPS）对 Pb 固定的贡献特征。
Contribution characteristics of the in situ extracellular polymeric substances (EPS) in Phanerochaete chrysosporium to Pb immobilization.
机构信息
College of Environmental Science and Engineering, Guilin University of Technology, Guilin, 541004, China.
Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin, 541004, China.
出版信息
Bioprocess Biosyst Eng. 2017 Oct;40(10):1447-1452. doi: 10.1007/s00449-017-1802-2. Epub 2017 Jun 24.
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 Pb immobilization experiments, EPS was demonstrated to play a more important role in immobilizing Pb 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 Pb immobilization by EPS produced at 7 days was most successful.
白腐真菌对重金属离子具有很强的吸附能力，这已经得到了广泛的报道，而关于真菌胞外聚合物（EPS）的知识则很少涉及。在这项研究中，研究了“黄孢原毛平革菌中内源性 EPS 对 Pb 的固定化作用特征。首先，研究了 EPS 的成分和数量。结果发现，EPS 的主要成分是碳水化合物，在第 5 天产生的 EPS 最多。在 Pb 固定化实验中，发现 EPS 在较低初始 Pb 浓度下对 Pb 的固定化起更重要的作用。pH 值的升高有利于 EPS 固定 Pb。在一定程度上，较高的 EPS 量增加了 Pb 的去除效率，而比吸附量则降低。在第 7 天产生的 EPS 进行的 Pb 固定化最成功。
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