Effect of electrochemical cell structure on natural organic matter (NOM) removal from surface water through electrocoagulation (EC)

Mikko Vepsäläinen (Corresponding Author), Martti Pulliainen, Mika Sillanpää

Research output: Contribution to journalArticleScientificpeer-review

43 Citations (Scopus)

Abstract

This study analyzed the effect of electrocoagulation cell construction on NOM removal from Finnish surface water. Three types of cells were used in this research: one that only had aluminum electrodes, one that had aluminum anodes and inert cathodes, and one that had inert anodes and aluminum cathodes. Main water quality parameters such as TOC, apparent color, and concentrations of residual metals were measured from the samples. A statistical model was made from the results using partial least squares (PLSs) regression. According to the results, electrocoagulation was able to produce high quality water with low NOM concentration. Lowest measured TOC concentration was 4.02 mg/l (78% removal). The potential applications of water after the treatment could be potable water or industrial fresh water. Aluminum originating from the anodes or cathodes had similar NOM removal efficiency. According to TOC and ζ-Potential results, the mechanism of NOM removal was similar to chemical coagulation in different pHs. It seems that in low pH, double layer compression was the main destabilization mechanism whereas in higher pH, adsorption and bridging dominated.
Original languageEnglish
Pages (from-to)20-27
JournalSeparation and Purification Technology
Volume99
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Fingerprint

Electrochemical cells
Aluminum
Surface waters
Biological materials
Anodes
Cathodes
Water quality
Water
Coagulation
Potable water
Drinking Water
Metals
Color
Adsorption
Electrodes

Keywords

  • Electrocoagulation
  • natural organic matter
  • response surface method
  • water treatment

Cite this

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title = "Effect of electrochemical cell structure on natural organic matter (NOM) removal from surface water through electrocoagulation (EC)",
abstract = "This study analyzed the effect of electrocoagulation cell construction on NOM removal from Finnish surface water. Three types of cells were used in this research: one that only had aluminum electrodes, one that had aluminum anodes and inert cathodes, and one that had inert anodes and aluminum cathodes. Main water quality parameters such as TOC, apparent color, and concentrations of residual metals were measured from the samples. A statistical model was made from the results using partial least squares (PLSs) regression. According to the results, electrocoagulation was able to produce high quality water with low NOM concentration. Lowest measured TOC concentration was 4.02 mg/l (78{\%} removal). The potential applications of water after the treatment could be potable water or industrial fresh water. Aluminum originating from the anodes or cathodes had similar NOM removal efficiency. According to TOC and ζ-Potential results, the mechanism of NOM removal was similar to chemical coagulation in different pHs. It seems that in low pH, double layer compression was the main destabilization mechanism whereas in higher pH, adsorption and bridging dominated.",
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author = "Mikko Veps{\"a}l{\"a}inen and Martti Pulliainen and Mika Sillanp{\"a}{\"a}",
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Effect of electrochemical cell structure on natural organic matter (NOM) removal from surface water through electrocoagulation (EC). / Vepsäläinen, Mikko (Corresponding Author); Pulliainen, Martti; Sillanpää, Mika.

In: Separation and Purification Technology, Vol. 99, 2012, p. 20-27.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of electrochemical cell structure on natural organic matter (NOM) removal from surface water through electrocoagulation (EC)

AU - Vepsäläinen, Mikko

AU - Pulliainen, Martti

AU - Sillanpää, Mika

PY - 2012

Y1 - 2012

N2 - This study analyzed the effect of electrocoagulation cell construction on NOM removal from Finnish surface water. Three types of cells were used in this research: one that only had aluminum electrodes, one that had aluminum anodes and inert cathodes, and one that had inert anodes and aluminum cathodes. Main water quality parameters such as TOC, apparent color, and concentrations of residual metals were measured from the samples. A statistical model was made from the results using partial least squares (PLSs) regression. According to the results, electrocoagulation was able to produce high quality water with low NOM concentration. Lowest measured TOC concentration was 4.02 mg/l (78% removal). The potential applications of water after the treatment could be potable water or industrial fresh water. Aluminum originating from the anodes or cathodes had similar NOM removal efficiency. According to TOC and ζ-Potential results, the mechanism of NOM removal was similar to chemical coagulation in different pHs. It seems that in low pH, double layer compression was the main destabilization mechanism whereas in higher pH, adsorption and bridging dominated.

AB - This study analyzed the effect of electrocoagulation cell construction on NOM removal from Finnish surface water. Three types of cells were used in this research: one that only had aluminum electrodes, one that had aluminum anodes and inert cathodes, and one that had inert anodes and aluminum cathodes. Main water quality parameters such as TOC, apparent color, and concentrations of residual metals were measured from the samples. A statistical model was made from the results using partial least squares (PLSs) regression. According to the results, electrocoagulation was able to produce high quality water with low NOM concentration. Lowest measured TOC concentration was 4.02 mg/l (78% removal). The potential applications of water after the treatment could be potable water or industrial fresh water. Aluminum originating from the anodes or cathodes had similar NOM removal efficiency. According to TOC and ζ-Potential results, the mechanism of NOM removal was similar to chemical coagulation in different pHs. It seems that in low pH, double layer compression was the main destabilization mechanism whereas in higher pH, adsorption and bridging dominated.

KW - Electrocoagulation

KW - natural organic matter

KW - response surface method

KW - water treatment

U2 - 10.1016/j.seppur.2012.08.011

DO - 10.1016/j.seppur.2012.08.011

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JO - Separation and Purification Technology

JF - Separation and Purification Technology

SN - 1383-5866

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