Review: Clay-Modified Electrodes in Heterogeneous Electro-Fenton Process for Degradation of Organic Compounds: The Potential of Structural Fe(III) as Catalytic Sites

被引:8
|
作者
Cipriano Crapina, Laura [1 ]
Dzene, Liva [1 ]
Brendle, Jocelyne [1 ]
Fourcade, Florence [2 ]
Amrane, Abdeltif [2 ]
Limousy, Lionel [1 ]
机构
[1] Univ Strasbourg, Univ Haute Alsace, Inst Sci Mat Mulhouse CNRS UMR 7361, 3b Rue Alfred Werner, F-68093 Mulhouse, France
[2] Univ Rennes, CNRS, Ecole Natl Super Chim Rennes, UMR 6226, F-35000 Rennes, France
关键词
Fenton; clay minerals; catalysis; environment; wastewater; ELECTROCHEMICAL ADVANCED OXIDATION; WIDE PH RANGE; CARBON-FELT CATHODE; CENTER-DOT-OH; HYDROGEN-PEROXIDE; HYDROXYL RADICALS; REDUCTION MECHANISM; PARTICLE ELECTRODES; REDOX PROPERTIES; DIOCTAHEDRAL SMECTITES;
D O I
10.3390/ma14247742
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Advanced oxidation processes are considered as a promising technology for the removal of persistent organic pollutants from industrial wastewaters. In particular, the heterogeneous electro-Fenton (HEF) process has several advantages such as allowing the working pH to be circumneutral or alkaline, recovering and reusing the catalyst and avoiding the release of iron in the environment as a secondary pollutant. Among different iron-containing catalysts, studies using clay-modified electrodes in HEF process are the focus in this review. Fe(III)/Fe(II) within the lattice of clay minerals can possibly serve as catalytic sites in HEF process. The description of the preparation and application of clay-modified electrodes in the degradation of model pollutants in HEF process is detailed in the review. The absence of mediators responsible for transferring electrons to structural Fe(III) and regenerating catalytic Fe(II) was considered as a milestone in the field. A comprehensive review of studies investigating the use of electron transfer mediators as well as the mechanism behind electron transfer from and to the clay mineral structure was assembled in order to uncover other milestones to be addressed in this study area.
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页数:42
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