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Investigation and improvement of a novel double-working-electrode electrochemical system for organic matter treatment from high-salinity wastewater

Yu, Han LU ; Zhao, Min; Zhang, Linus LU ; Dong, Heng; Yu, Hongbing and Chen, Ze (2017) In Environmental Technology 38(22). p.2907-2915
Abstract

The novel double-working-electrode electrochemical system with air diffusion cathode (ADC) and Ti/SnO2-Sb anode (TSSA) has shown higher efficiency and lower energy consumption for the degradation of organic pollutant from high-salinity wastewater, compared to the traditional single anode system. To further investigate and improve this system, in this work, firstly the effect of vital factors of the double-working-electrode electrochemical system including initial methyl orange (MO) concentration, NaCl concentration and initial pH value of organic solution were investigated, using MO as the targeted organic pollutant, carbon black ADC (CBAC) as cathode and stainless steel mesh electrode (SSME) as control. Besides, for the... (More)

The novel double-working-electrode electrochemical system with air diffusion cathode (ADC) and Ti/SnO2-Sb anode (TSSA) has shown higher efficiency and lower energy consumption for the degradation of organic pollutant from high-salinity wastewater, compared to the traditional single anode system. To further investigate and improve this system, in this work, firstly the effect of vital factors of the double-working-electrode electrochemical system including initial methyl orange (MO) concentration, NaCl concentration and initial pH value of organic solution were investigated, using MO as the targeted organic pollutant, carbon black ADC (CBAC) as cathode and stainless steel mesh electrode (SSME) as control. Besides, for the further improvement of removal performance, a novel home-made activated carbon-ADC (ACAC) was studied as cathode with the same investigation process. The results showed that, in the experiments studying the effect of both initial MO and NaCl concentrations, the removal performance was in the order of TSSA-ACAC > TSSA-CBAC > TSSA-SSME in all conditions of initial MO and NaCl concentrations. However, with the pH value reduced from 6.0 to 3.0, the performances of three systems turned to be much closer to each other. Besides, ACAC played a synergistic role in MO removal by greatly improving the MO removal performance and enhancing its adaptability to the reactor parametric variation. ACAC created a weak acidic environment for accelerating the indirect electro-oxidation of MO on TSSA. The MO degradation pathways in the three systems were the same but the TSSA-ACAC system gave a higher degradation kinetics order.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
activated carbon, air diffusion cathode, Electrochemical treatment, high-salinity organic wastewater, synergistic mechanism
in
Environmental Technology
volume
38
issue
22
pages
2907 - 2915
publisher
Selper Ltd
external identifiers
  • scopus:85011559367
  • wos:000412560000013
ISSN
0959-3330
DOI
10.1080/09593330.2017.1282543
language
English
LU publication?
yes
id
f2c413ef-16b7-413e-8ffc-ea3dc62ee30a
date added to LUP
2017-02-15 12:13:48
date last changed
2018-05-08 14:25:32
@article{f2c413ef-16b7-413e-8ffc-ea3dc62ee30a,
  abstract     = {<p>The novel double-working-electrode electrochemical system with air diffusion cathode (ADC) and Ti/SnO<sub>2</sub>-Sb anode (TSSA) has shown higher efficiency and lower energy consumption for the degradation of organic pollutant from high-salinity wastewater, compared to the traditional single anode system. To further investigate and improve this system, in this work, firstly the effect of vital factors of the double-working-electrode electrochemical system including initial methyl orange (MO) concentration, NaCl concentration and initial pH value of organic solution were investigated, using MO as the targeted organic pollutant, carbon black ADC (CBAC) as cathode and stainless steel mesh electrode (SSME) as control. Besides, for the further improvement of removal performance, a novel home-made activated carbon-ADC (ACAC) was studied as cathode with the same investigation process. The results showed that, in the experiments studying the effect of both initial MO and NaCl concentrations, the removal performance was in the order of TSSA-ACAC &gt; TSSA-CBAC &gt; TSSA-SSME in all conditions of initial MO and NaCl concentrations. However, with the pH value reduced from 6.0 to 3.0, the performances of three systems turned to be much closer to each other. Besides, ACAC played a synergistic role in MO removal by greatly improving the MO removal performance and enhancing its adaptability to the reactor parametric variation. ACAC created a weak acidic environment for accelerating the indirect electro-oxidation of MO on TSSA. The MO degradation pathways in the three systems were the same but the TSSA-ACAC system gave a higher degradation kinetics order.</p>},
  author       = {Yu, Han and Zhao, Min and Zhang, Linus and Dong, Heng and Yu, Hongbing and Chen, Ze},
  issn         = {0959-3330},
  keyword      = {activated carbon,air diffusion cathode,Electrochemical treatment,high-salinity organic wastewater,synergistic mechanism},
  language     = {eng},
  month        = {11},
  number       = {22},
  pages        = {2907--2915},
  publisher    = {Selper Ltd},
  series       = {Environmental Technology},
  title        = {Investigation and improvement of a novel double-working-electrode electrochemical system for organic matter treatment from high-salinity wastewater},
  url          = {http://dx.doi.org/10.1080/09593330.2017.1282543},
  volume       = {38},
  year         = {2017},
}