title: [Removal of estrogens in laccase catalyzed oxidative processes].
abstract: The removal of 5 estrogens (bisphenol A, estradiol, ethinylestradiol, estrone and octylphenol) in laccase catalyzed oxidative processes was studied. The effects of pH and NOM on the removal of EDCs were discussed in detail, as well as the kinetics of EE2 removal and the reaction products. The results indicated that laccase was capable of removing estrogens efficiently. The optimal pH was between 4 and 6. NOM significantly inhibited the removal of estrogens at the initial stage of the reaction. However, the adverse effect of NOM was not obvious after 24 h treatment. The removal of EE2 obeyed the second-order kinetics. The activity of laccase remained stable during the reactions and the stability was higher than that of peroxidase. MS analysis demonstrated that the EE2 dimer formed through radical coupling mechanism was the main reaction product.
authors.affiliation: College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China. xiaqingjiajia@163.com
authors.forename: Qing
authors.initials: Q
authors.lastname: Xia
authors.forename: Wei-Ping
authors.initials: WP
authors.lastname: Xie
authors.forename: Guo-Qiang
authors.initials: GQ
authors.lastname: Liu
authors.forename: Yun-Yan
authors.initials: YY
authors.lastname: Liao
authors.forename: Bin-Nan
authors.initials: BN
authors.lastname: Wang
authors.forename: De-Yang
authors.initials: DY
authors.lastname: Kong
authors.forename: Jun-He
authors.initials: JH
authors.lastname: Lu
mesh_terms: D001559:Benzhydryl Compounds / Q000302:isolation & purification; D004958:Estradiol / Q000302:isolation & purification; D004967:Estrogens / Q000302:isolation & purification*; D004997:Ethinyl Estradiol / Q000302:isolation & purification; D007700:Kinetics; D042845:Laccase / Q000378:metabolism*; D010084:Oxidation-Reduction; D010636:Phenols / Q000302:isolation & purification; D014874:Water Pollutants, Chemical; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D004958:Estradiol; D004967:Estrogens; D004997:Ethinyl Estradiol; D042845:Laccase; D010636:Phenols; D014874:Water Pollutants, Chemical; C474055:octylphenol; C006780:bisphenol A; D000098826:Bisphenol A Compounds