Research on the degradation mechanism of pyridine in drinking water by dielectric barrier discharge

2017 ◽  
Vol 53 ◽  
pp. 238-247 ◽  
Author(s):  
Yang Li ◽  
Rongjie Yi ◽  
Chengwu Yi ◽  
Biyun Zhou ◽  
Huijuan Wang
Keyword(s):  
Drinking Water ◽  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Degradation Mechanism ◽  
Dielectric Barrier

Degradation of Reactive Black 5 in Aqueous Solution by Double-Dielectric Barrier Discharge

2012 ◽  
Vol 610-613 ◽  
pp. 1616-1619
Author(s):  
Shu Fang Mei ◽  
Ya Nan Liu
Keyword(s):  
Aqueous Solution ◽  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Degradation Mechanism ◽  
Degradation Process ◽  
Reactive Black 5 ◽  
Dielectric Barrier ◽  
Treated Sample ◽  
Conductivity Increase ◽  
Decolorization Efficiency

Degradation of Reactive Black 5 in aqueous solution was studied by double-dielectric barrier discharge, degradation efficiency and degradation mechanism has been investigated. Results shows that during in ten minutes degradation, decolorization efficiency can reach 98.76%,COD and TOC could not be reduce observably, while the biodegradability has been greatly improved, the BOD5/COD ratio increase from 0.079 to 0.495.Decolorization efficiency is higher than that of mineralization, decolorization follows the first order kinetics with a constant rate of 0.4008 min-1. pH of the solution decrease gradually, but the conductivity increase during the degradation process. The ions of sulfate, nitrate, acetic acid, and oxalic acid have been found in the final treated sample and their concentrations increase with the reaction time. Chromophore group is damaged firstly and the solution has been decolorized efficiently, the degradation of benzene ring and naphthalene ring is more difficult than that of the azo bond, and the reduction or disappearance of absorption peaks indicates that the aromatic ring of KN-B was degraded partly.

scholarly journals In Plasma Catalytic Oxidation of Toluene Using Monolith CuO Foam as a Catalyst in a Wedged High Voltage Electrode Dielectric Barrier Discharge Reactor: Influence of Reaction Parameters and Byproduct Control

2019 ◽  
Vol 16 (5) ◽  
pp. 711 ◽  
Author(s):  
Juexiu Li ◽  
Hongbo Zhang ◽  
Diwen Ying ◽  
Yalin Wang ◽  
Tonghua Sun ◽  
...  
Keyword(s):  
Dielectric Barrier Discharge ◽  
Removal Efficiency ◽  
High Voltage ◽  
Barrier Discharge ◽  
Degradation Mechanism ◽  
Anthropogenic Sources ◽  
Substantial Contribution ◽  
High Voltage Electrode ◽  
Dielectric Barrier ◽  
Dbd Reactor

Volatile organic compounds (VOCs) emission from anthropogenic sources has becoming increasingly serious in recent decades owing to the substantial contribution to haze formation and adverse health impact. To tackle this issue, various physical and chemical techniques are applied to eliminate VOC emissions so as to reduce atmospheric pollution. Among these methods, non-thermal plasma (NTP) is receiving increasing attention for the higher removal efficiency, non-selectivity, and moderate operation, whereas the unwanted producing of NO2 and O3 remains important drawback. In this study, a dielectric barrier discharge (DBD) reactor with wedged high voltage electrode coupled CuO foam in an in plasma catalytic (IPC) system was developed to remove toluene as the target VOC. The monolith CuO foam exhibits advantages of easy installation and controllable of IPC length. The influencing factors of IPC reaction were studied. Results showed stronger and more stable plasma discharge in the presence of CuO foam in DBD reactor. Enhanced performance was observed in IPC reaction for both of toluene conversion rate and CO2 selectivity compared to the sole NTP process at the same input energy. The longer the contributed IPC length, the higher the toluene removal efficiency. The toluene degradation mechanism under IPC condition was speculated. The producing of NO2 and O3 under IPC process were effectively removed using Na2SO3 bubble absorption.

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