Biotechnology Bulletin ›› 2020, Vol. 36 ›› Issue (12): 188-198.doi: 10.13560/j.cnki.biotech.bull.1985.2020-0377

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Removal of Bisphenol A in Wastewater by Immobilized Laccase

SUN Kai(), CHEN Zheng-jie, WANG Deng-yang, SHU Ru-yu, WU Ji, WEI Fan   

  1. Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention,School of Resources and Environment,Anhui Agricultural University,Hefei 230036
  • Received:2020-04-03 Online:2020-12-26 Published:2020-12-22

Abstract:

Bisphenol A(BPA)is an essential synthetic chemical material,which is generally used as a plasticizer in industrial and residential applications to produce polycarbonate plastics and epoxy resins. BPA may accumulate in wildlife and human body,which leads to imbalance and disorder of the endocrine system of the organism,and even induces cancer risk. Adsorption,Fenton oxidation,electrochemistry,photocatalytic degradation,and biological film filtering are capable of effectively removing BPA in wastewater. However,it is difficult for these conventional technologies to eliminate trace amounts of BPA,and even easily causes secondary damages to the ecological environment. Fortunately,laccase-catalyzed radical oxidation reactions have the advantages of mild reaction conditions,high catalytic performance,controllable operation,cost-effectiveness,and environmental friendliness,and thus it has extremely high strategic value in repairing BPA polluted wastewater. Currently,the application of immobilization technology is not only expected to achieve the continuous removal of BPA by laccase,but reinforces laccase-mediated oxidative degradation of BPA. The main sources of BPA and its harms to organisms are reviewed,and particularly,the immobilized laccase-catalyzed transformation efficiency and mechanism of BPA are systematically summarized,further the ecotoxicity of BPA intermediate products is also clarified in laccase-mediated reaction processes. These findings are aimed at laying a theoretical basis and technical support for the large-scale application of immobilized laccase in wastewater treatment.

Key words: bisphenol A, immobilized laccase, wastewater treatment