title: Oxidative removal of bisphenol A using zero valent aluminum-acid system.
abstract: Bisphenol A (BPA), a controversial endocrine disruptor, is ubiquitous in the aquatic environment. In this study, the oxidative degradation of BPA and its mechanism using zero valent aluminum (ZVAl)-acid system under air-equilibrated conditions was investigated. Under pH <3.5 acidic conditions, ZVAl demonstrated an excellent capacity to remove BPA. More than 75% of BPA was eliminated within 12 h in pH 1.5 reaction solutions initially containing 4.0 g/L aluminum and 2.0 mg/L BPA at 25 ± 1 °C. The removal of BPA was further accelerated with increasing aluminum loadings. Higher temperature and lower initial pH also facilitated BPA removal. The addition of Fe(2+) into the ZVAl-acid system significantly accelerated the reaction likely due to the enhancing transformation of H(2)O(2) to HO via Fenton reaction. Furthermore, the primary products or intermediates including monohydroxylated BPA, hydroquinone, 2-(4-hydroxyphenyl)propane and 4-isopropenylphenol, were identified and a possible reaction scheme was proposed. The remarkable capacity of the ZVAl-acid system in removing BPA displays its potential application in the treatment of organic compound-contaminated water.
authors.affiliation: College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
authors.forename: Wanpeng
authors.initials: W
authors.lastname: Liu
authors.forename: Honghua
authors.initials: H
authors.lastname: Zhang
authors.forename: Beipei
authors.initials: B
authors.lastname: Cao
authors.forename: Kunde
authors.initials: K
authors.lastname: Lin
authors.forename: Jay
authors.initials: J
authors.lastname: Gan
mesh_terms: D000143:Acids / Q000737:chemistry*; D000535:Aluminum / Q000737:chemistry*; D001559:Benzhydryl Compounds; D006812:Humic Substances / Q000032:analysis; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry; D013058:Mass Spectrometry; D010084:Oxidation-Reduction; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification*; D012996:Solutions; D000098826:Bisphenol A Compounds
chemical_list: D000143:Acids; D000535:Aluminum; D001559:Benzhydryl Compounds; D006812:Humic Substances; D006861:Hydrogen Peroxide; D007501:Iron; D010636:Phenols; D012996:Solutions; C006780:bisphenol A; D000098826:Bisphenol A Compounds