Degradation of brominated flame retardant by the composite treatment of white-rot fungi and ultrasonic irradiation

研究了白腐菌与超声波复合处理对溴化阻燃剂六溴环十二烷的降解效果。超声辐照对HBCD的α -异构体有较好的降解效果，其降解率高于β -和γ -异构体。白腐菌对α -异构体的降解率低于其他异构体。此外，白腐菌在摇培养过程中产生的锰过氧化物酶能有效降解HBCD。作为HBCD的复合降解，锰过氧化物酶处理在超声照射10分钟后进行。锰过氧化物酶可以利用超声波辐照产生的过氧化氢降解HBCD。

The degradation of brominated flame retardant HBCD (hexabromocyclododecane) by the composite treatment of white-rot fungi and ultrasonic irradiation was investigated. Alpha-isomer of HBCD was efficiently degraded by the ultrasonic irradiation, and its degradation rate was higher than those of beta- and gamma-isomers. While the degradation rate of alpha-isomer by the white-rot fungi treatment was lower than the other isomers. In addition, manganese peroxidase, which was produced by the white-rot fungi during shaking culture, was efficiently degraded the HBCD.As a composite degradation of the HBCD, the manganese peroxidase treatment was carried out just after 10 minutes of ultrasonic irradiation. The manganese peroxidase could degrade the HBCD using hydrogen peroxide produced by the ultrasonic irradiation.