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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：盘锦校区食品与环境学院副院长 Vice Dean School of Food and Environment Panjin Campus Dalian University of Technology
性别：女
毕业院校：大连理工大学
学位：博士
所在单位：化工海洋与生命学院
学科：环境工程. 环境科学
办公地点：环境学院 B 505
化工 海洋与生命学院 D05-201
联系方式：0427-2631799;
Comparative study of Fe2+/H2O2 and Fe3+/H2O2 electro-oxidation systems in the degradation of amaranth using anthraquinone/polypyrrole composite film modified graphite cathode
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论文类型：期刊论文
发表时间：2009-07-01
发表刊物：JOURNAL OF ELECTROANALYTICAL CHEMISTRY
收录刊物：SCIE
卷号：632
期号：1-2
页面范围：154-161
ISSN号：1572-6657
关键字：Amaranth; Anthraquinonedisulphonate; Electro-Fenton; Hydroxyl radicals; Kinetics; Polypyrrole
摘要：Removal of amaranth from aqueous solutions by Fe2+/H2O2 and Fe3+/H2O2 electro-oxidation systems was comparatively studied in an undivided electrochemical cell with anthraquinonedisulfonate (AQDS)/polypyrrole (PPy) composite film modified graphite as cathode. The modified cathode allowed the formation of strong oxidant hydroxyl radical ((OH)-O-center dot) in the medium via Fenton's reaction between cathodically generated H2O2 and added or regenerated Fe2+. The effects of solution pH and iron catalyst concentration on dye degradation by the two systems were studied and compared. Degradation intermediates were analyzed by FTIR and GC-MS, and a tentative reaction pathway is proposed. Dye decay reaction always obeys pseudo-first-order kinetics for Fe3+/H2O2 process, while dye degradation follows a two-stage process with each stage obeying pseudo-first-order kinetics in the case of Fe2+/H2O2 system. In addition, the long-term stability and structural relaxation of the composite film during multiple experimental runs are also examined. (C) 2009 Elsevier B.V. All rights reserved.