title: Destruction of 4-phenolsulfonic acid in water by anodic contact glow discharge electrolysis.
abstract: Destruction of 4-phenolsulfonic acid (4-PSA) in water was carried out using anodic contact glow discharge electrolysis. Accompanying the decay of 4-PSA, the amount of total organic carbon (TOC) in water correspondingly decreased, while the sulfonate group of 4-PSA was released as sulfate ion. Oxalate and formate were obtained as minor by-products. Additionally, phenol, 1,4-hydroquinone, hydroxyquinol and 1,4-benzoquinone were detected as primary intermediates in the initial stages of decomposition of 4-PSA. A reaction pathway involving successive attacks of hydroxyl and hydrogen radicals was assumed on the basis of the observed products and kinetics. It was revealed that the decay of both 4-PSA and TOC obeyed a first-order rate law. The effects of different Fe ions and initial concentrations of 4-PSA on the degradation rate were investigated. It was found that the presence of Fe ions could increase the degradation rate of 4-PSA, while initial concentrations lower than 80 mmol/L had no significant effect on kinetic behaviour. The disappearance rate of 4-PSA was significantly affected by pH.
authors.affiliation: School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114044, China. yanghaiming80@sina.com
authors.forename: Haiming
authors.initials: H
authors.lastname: Yang
authors.forename: Baigang
authors.initials: B
authors.lastname: An
authors.forename: Shaoyan
authors.initials: S
authors.lastname: Wang
authors.forename: Lixiang
authors.initials: L
authors.lastname: Li
authors.forename: Wenjie
authors.initials: W
authors.lastname: Jin
authors.forename: Lihua
authors.initials: L
authors.lastname: Li
mesh_terms: D001557:Benzenesulfonates / Q000737:chemistry*; D016227:Benzoquinones / Q000737:chemistry; D004572:Electrolysis / Q000379:methods*; D006873:Hydroquinones / Q000737:chemistry; D014867:Water / Q000737:chemistry*
chemical_list: D001557:Benzenesulfonates; D016227:Benzoquinones; D006873:Hydroquinones; D014867:Water; C013038:hydroxyhydroquinone; C004532:quinone; C051833:4-phenolsulfonic acid