title: Application of excitation and emission matrix fluorescence (EEM) and UV-vis absorption to monitor the characteristics of Alizarin Red S (ARS) during electro-Fenton degradation process.
abstract: Oxidative degradation of Alizarin Red S (ARS) in aqueous solutions by using electro-Fenton was studied. At first, effect of operating parameters such as current density, aeration rate and initial pH on the degradation of ARS were studied by using UV-vis spectrum, respectively. Then, under the optimal operating conditions (current density: 10.0mAcm(-2), aeration rate: 1000mLmin(-1), initial pH: 2.8), the identification of degradation products of ARS was carried out by using GC-MS and HPLC, meanwhile its degradation pathway was proposed according to the intermediates. Considering the location, intensity and intensity ratio of fluorescence center peak of the ARS in aqueous solution, a convenient and quick monitoring method by using excitation-emission matrix fluorescence spectrum technology was developed to monitor the degradation degree of ARS through electro-Fenton process. Furthermore, it is suggested that the developed method would be promising for the quick analysis and evaluation of the degradation degree of the pollutants with π-conjugated system.
authors.affiliation: Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China. Electronic address: laibo1981@163.com.
authors.forename: Bo
authors.initials: B
authors.lastname: Lai
authors.forename: Yuexi
authors.initials: Y
authors.lastname: Zhou
authors.forename: Juling
authors.initials: J
authors.lastname: Wang
authors.forename: Zhishan
authors.initials: Z
authors.lastname: Yang
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Chen
mesh_terms: D000042:Absorption; D000327:Adsorption; D000880:Anthraquinones / Q000032:analysis / Q000737:chemistry*; D005453:Fluorescence; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*
chemical_list: D000880:Anthraquinones; D014874:Water Pollutants, Chemical; C004468:Alizarin Red S; D006861:Hydrogen Peroxide; D007501:Iron
keywords: Alizarin Red S (ARS); Electro-Fenton; Excitation–emission matrix (EEM); UV–vis adsorption