Catalytic polymerization of bisphenol A using a horseradish peroxidase immobilized microporous membrane reactor

Bisphenol A (BPA) is one of the most widely used chemical products, which is discharged into rivers and oceans, posing great hazards to organisms such as reproductive toxicity, hormone imbalance and cardiopathy induction. With the expansion harm of BPA, people have been paid more attention to the environmental effects. In this paper, the degradation of BPA from the synthetic wastewater using the immobilization of horseradish peroxidase membrane reactor (HPR) was investigated. The immobilized HRP microporous membrane was prepared by the porous calcium alginate method. In addition, the reuse of the immobilized HPR membrane and the measurement of membrane flux showed that the membrane has good activity and stability. Finally, the experimental parameters including reaction time, pH, the concentration of BPA and the dosage of H2O2 were optimized to remove the BPA, and about 78% degradation efficiency of BPA was achieved at the optimal condition as follows: H2O2 to BPA molar ratio of 1.50 with an initial BPA concentration of 0.1 mol/L, the HPR dosage of 3.84 u/ml, the initial solution pH of 7.0, a temperature of 20 degrees C and a contact time of 10 min.

Automated summary

This paper investigated the degradation of BPA in synthetic wastewater using the immobilization of horseradish peroxidase membrane reactor. The immobilized HRP microporous membrane showed good activity and stability. By optimizing the reaction parameters, a high BPA degradation efficiency of about 78% was achieved. This study is of great significance for addressing the environmental issues associated with BPA discharge.