Enhancement of biodegradability of o-toluidine effluents by electro-assisted photo-Fenton treatment

被引：33
作者：
Garcia-Segura, Sergi [1 ]
Anotai, Jin [2 ]
Singhadech, Somporn [3 ]
Lu, Ming-Chun [1 ]
机构：
[1] Chia Nan Univ Pharm & Sci, Dept Environm Resources Management, Tainan 71710, Taiwan
[2] King Mongkuts Univ Technol Thonburi, Faulty Engn, Dept Environm Engn, Natl Ctr Excellence Environm & Hazardous Waste Ma, Bangkok 10140, Thailand
[3] Chulalongkorn Univ, Dept Int Postgrad Programs Environm Management Ha, Bangkok 10330, Thailand
来源：
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION | 2017年 / 106卷
关键词：
Photo-Fenton; Anodic oxidation; RuO2/IrO2 Dimensional Stable; Anodes (DSA); Water treatment technologies; Persistent organic pollutants; Electrochemical advanced oxidation processes; o-toluidine reaction pathway; ADVANCED OXIDATION PROCESSES; IMMOBILIZED IRON-OXIDE; WASTE-WATER; ELECTROCHEMICAL PROCESSES; CATALYTIC DEGRADATION; ANODIC-OXIDATION; WASTEWATERS; MINERALIZATION; PRETREATMENT; POLLUTANTS;
D O I：
10.1016/j.psep.2016.12.011
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The treatment of highly recalcitrant and non-biodegradable solutions of 1 mM of o-toluidine has been comparatively treated by different water treatment technologies based on Fenton's reaction: conventional Fenton process, electro-assisted Fenton process and electro-assisted photo-Fenton process. The pollutant was mainly oxidized by the homogeneous (OH)-O-center dot released in situ by the Fenton's reaction. The electro-assisted photo-Fenton technology demonstrated better performance due to the faster electro-regeneration of iron(II) and the coupled photolysis of several by-products such carboxylic acids attaining complete o-toluidine removal in 60 min of treatment. The study of the biodegradability enhancement after the treatment achievieng values near to 0.4 of BOD5/COD ratio assessed the feasible application of electro-assisted photo-Fenton process as pre-biological treatment. In addition, a reaction pathway for o-toluidine mineralization by electro-assisted photo-Fenton's reaction is proposed. (C) 2017 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：60 / 67
页数：8
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