title: Feasibility of a two-stage reduction/subsequent oxidation for treating Tetrabromobisphenol A in aqueous solutions.
abstract: A "two-stage reduction/subsequent oxidation" (T-SRO) process consists of Fe-Ag reduction and Fenton-like oxidation under ultrasound (US) radiation. Due to the refractory oxidation of brominated flame retardant, T-SRO was employed to remove Tetrabromobisphenol A (TBBPA) by the combination of first debromination and succeeding oxidation. It indicated that the T-SRO process resulted in a complete decrease in TBBPA concentration and a 99.2% decrease in BPA concentration. The T-SRO process for the removal of TBBPA is much effective than Fenton-like oxidation of TBBPA alone. The result showed that US radiation improved the Fenton-like oxidation rate of BPA solutions. The addition of dissolved iron into the Fenton-like oxidation system could accelerate the first 2 min reaction, but had little effect on the following process. The main intermediate products resulting from TBBPA reduction and BPA oxidation were identified by GC-MS and LC-MS/MS. On the basis of this analysis, reactions with •OH radical were identified as the major chemical pathways during BPA oxidation.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China.
authors.forename: Si
authors.initials: S
authors.lastname: Luo
authors.forename: Shao-gui
authors.initials: SG
authors.lastname: Yang
authors.forename: Cheng
authors.initials: C
authors.lastname: Sun
authors.forename: Xiao-dong
authors.initials: XD
authors.lastname: Wang
mesh_terms: D001559:Benzhydryl Compounds; D002849:Chromatography, Gas; D002853:Chromatography, Liquid; D005240:Feasibility Studies; D054879:Halogenation; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D013058:Mass Spectrometry; D053768:Metal Nanoparticles / Q000737:chemistry; D010084:Oxidation-Reduction; D010636:Phenols / Q000737:chemistry; D011075:Polybrominated Biphenyls / Q000737:chemistry / Q000302:isolation & purification*; D012834:Silver / Q000737:chemistry; D012996:Solutions; D013499:Surface Properties; D013997:Time Factors; D014465:Ultrasonics; D018508:Water Purification / Q000379:methods*; D014961:X-Ray Diffraction; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D006861:Hydrogen Peroxide; D007501:Iron; D010636:Phenols; D011075:Polybrominated Biphenyls; D012834:Silver; D012996:Solutions; C045076:Fenton's reagent; C020806:tetrabromobisphenol A; C006780:bisphenol A; D000098826:Bisphenol A Compounds