Effect of Tween 80 and beta-cyclodextrin on degradation of decabromodiphenyl ether (BDE-209) by White rot fungi.
The environmental safety of decabromodiphenyl ether (BDE-209), a widely used flame retardant, has been the topic of controversial discussions during the past several years. Degradation of BDE-209 into lower brominated diphenyl ether congeners, exhibiting a higher bioaccumulation potential, has been a critical issue. White rot fungi are known to degrade a wide variety of recalcitrant pollutants. In this work, white rot fungi were used to degrade BDE-209 in liquid culture medium, and the effects of Tween 80 and beta-cyclodextrin on BDE-209 degradation by white rot fungi were evaluated. On the basis of these results, it appears that BDE-209 could be degraded by white rot fungi, and Tween 80 and beta-cyclodextrin can both increase the biodegradation. The best result in Tween 80 experiments was obtained at a Tween 80 concentration of 500mgl(-1) within 10d, which showed 96.5% (w/w) BDE-209 transformed. Tween 80 at a high concentration will restrain the fungal growth and the degradation of BDE-209. However, beta-cyclodextrin had positive effects both on the BDE-209 degradation and the fungal growth.
Zhou
Juan
J
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, People's Republic of China.
Jiang
Weiying
W
Ding
Juan
J
Zhang
Xingding
X
Gao
Shixiang
S
D001673:Biodegradation, Environmental; D004785:Environmental Pollutants / Q000032:analysis*; D005411:Flame Retardants / Q000032:analysis*; D055768:Halogenated Diphenyl Ethers; D008954:Models, Biological; D020075:Phanerochaete / Q000254:growth & development*; D010647:Phenyl Ethers / Q000032:analysis*; D011075:Polybrominated Biphenyls / Q000032:analysis*; D011136:Polysorbates / Q000737:chemistry*; D047392:beta-Cyclodextrins / Q000737:chemistry*
D004785:Environmental Pollutants; D005411:Flame Retardants; D055768:Halogenated Diphenyl Ethers; D010647:Phenyl Ethers; D011075:Polybrominated Biphenyls; D011136:Polysorbates; D047392:beta-Cyclodextrins; C031215:betadex; C010902:decabromobiphenyl ether