title: Electrochemical degradation of 4-chlorophenol in aqueous solution using modified PbO(2) anode.
abstract: The electrochemical oxidation of 4-chlorophenol (4-CP) in aqueous solution was studied by electrochemical oxidation using modified PbO(2) electrode as anode. The influence of several operating parameters, such as initial 4-CP concentration, applied current density, and supporting electrolyte (Na(2)SO(4)) concentration was investigated. Ultraviolet spectroscopy and total organic carbon (TOC) measurements were conducted to study the kinetics of 4-CP electrochemical reaction and the mineralization efficiency of 4-CP. The experimental results showed that the 4-CP degradation always followed a pseudo-first-order kinetics. The higher mineralization of 4-CP and the lower current efficiency (CE) were obtained by the lower initial 4-CP concentration. The applied current density showed a positive influence on the degradation of 4-CP and the removal of TOC, but a higher applied current density led to a lower CE. Although Na(2)SO(4) concentration of 0.05 M resulted in a higher 4-CP and TOC removal, the result of one-way analysis of variance (ANOVA) indicates that Na(2)SO(4) concentration is not the significant parameter for 4-CP removal in electrochemical oxidation.
authors.affiliation: Jilin Normal University, Siping, China. duanxiaoyue0511@163.com
authors.forename: X Y
authors.initials: XY
authors.lastname: Duan
authors.forename: F
authors.initials: F
authors.lastname: Ma
authors.forename: L M
authors.initials: LM
authors.lastname: Chang
mesh_terms: D002733:Chlorophenols / Q000737:chemistry*; D004572:Electrolysis; D007854:Lead / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D002733:Chlorophenols; D010087:Oxides; D014874:Water Pollutants, Chemical; D007854:Lead; C029107:4-chlorophenol; C047365:lead oxide