Effects of conventional ozonation and electro-peroxone pretreatment of surface water on disinfection by-product formation during subsequent chlorination

Yuqin Mao, Di Guo, Weikun Yao, Xiaomao Wang, Hongwei Yang, Yuefeng F. Xie, Sridhar Komarneni, Gang Yu, Yujue Wang

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The electro-peroxone (E-peroxone) process is an emerging ozone-based electrochemical advanced oxidation process that combines conventional ozonation with in-situ cathodic hydrogen peroxide (H2O2) production for oxidative water treatment. In this study, the effects of the E-peroxone pretreatment on disinfection by-product (DBP) formation from chlorination of a synthetic surface water were investigated and compared to conventional ozonation. Results show that due to the enhanced transformation of ozone (O3) to hydroxyl radicals ([rad]OH) by electro-generated H2O2, the E-peroxone process considerably enhanced dissolved organic carbon (DOC) abatement and significantly reduced bromate (BrO3 ) formation compared to conventional ozonation. However, natural organic matter (NOM) with high UV254 absorbance, which is the major precursors of chlorination DBPs, was less efficiently abated during the E-peroxone process than conventional ozonation. Consequently, while both conventional ozonation and the E-peroxone process substantially reduced the formation of DBPs (trihalomethanes and haloacetic acids) during post-chlorination, higher DBP concentrations were generally observed during chlorination of the E-peroxone pretreated waters than conventional ozonation treated. In addition, because of conventional ozonation or the E-peroxone treatment, DBPs formed during post-chlorination shifted to more brominated species. The overall yields of brominated DBPs exhibited strong correlations with the bromide concentrations in water. Therefore, while the E-peroxone process can effectively suppress bromide transformation to bromate, it may lead to higher formation of brominated DBPs during post-chlorination compared to conventional ozonation. These results suggest that the E-peroxone process can lead to different DBP formation and speciation during water treatment trains compared to conventional ozonation.

Original languageEnglish (US)
Pages (from-to)322-332
Number of pages11
JournalWater Research
Volume130
DOIs
StatePublished - Mar 1 2018

Fingerprint

Ozonization
Disinfection
Chlorination
chlorination
Surface waters
disinfection
Byproducts
surface water
Water treatment
bromide
Ozone
water treatment
ozone
ozonation
by-product
effect
hydroxyl radical
Organic carbon
absorbance
Hydrogen peroxide

All Science Journal Classification (ASJC) codes

  • Ecological Modeling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

Cite this

@article{72818ce84dd049fa88bba9b79a8a4fc9,
title = "Effects of conventional ozonation and electro-peroxone pretreatment of surface water on disinfection by-product formation during subsequent chlorination",
abstract = "The electro-peroxone (E-peroxone) process is an emerging ozone-based electrochemical advanced oxidation process that combines conventional ozonation with in-situ cathodic hydrogen peroxide (H2O2) production for oxidative water treatment. In this study, the effects of the E-peroxone pretreatment on disinfection by-product (DBP) formation from chlorination of a synthetic surface water were investigated and compared to conventional ozonation. Results show that due to the enhanced transformation of ozone (O3) to hydroxyl radicals ([rad]OH) by electro-generated H2O2, the E-peroxone process considerably enhanced dissolved organic carbon (DOC) abatement and significantly reduced bromate (BrO3 −) formation compared to conventional ozonation. However, natural organic matter (NOM) with high UV254 absorbance, which is the major precursors of chlorination DBPs, was less efficiently abated during the E-peroxone process than conventional ozonation. Consequently, while both conventional ozonation and the E-peroxone process substantially reduced the formation of DBPs (trihalomethanes and haloacetic acids) during post-chlorination, higher DBP concentrations were generally observed during chlorination of the E-peroxone pretreated waters than conventional ozonation treated. In addition, because of conventional ozonation or the E-peroxone treatment, DBPs formed during post-chlorination shifted to more brominated species. The overall yields of brominated DBPs exhibited strong correlations with the bromide concentrations in water. Therefore, while the E-peroxone process can effectively suppress bromide transformation to bromate, it may lead to higher formation of brominated DBPs during post-chlorination compared to conventional ozonation. These results suggest that the E-peroxone process can lead to different DBP formation and speciation during water treatment trains compared to conventional ozonation.",
author = "Yuqin Mao and Di Guo and Weikun Yao and Xiaomao Wang and Hongwei Yang and Xie, {Yuefeng F.} and Sridhar Komarneni and Gang Yu and Yujue Wang",
year = "2018",
month = "3",
day = "1",
doi = "10.1016/j.watres.2017.12.019",
language = "English (US)",
volume = "130",
pages = "322--332",
journal = "Water Research",
issn = "0043-1354",
publisher = "Elsevier Limited",

}

Effects of conventional ozonation and electro-peroxone pretreatment of surface water on disinfection by-product formation during subsequent chlorination. / Mao, Yuqin; Guo, Di; Yao, Weikun; Wang, Xiaomao; Yang, Hongwei; Xie, Yuefeng F.; Komarneni, Sridhar; Yu, Gang; Wang, Yujue.

In: Water Research, Vol. 130, 01.03.2018, p. 322-332.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of conventional ozonation and electro-peroxone pretreatment of surface water on disinfection by-product formation during subsequent chlorination

AU - Mao, Yuqin

AU - Guo, Di

AU - Yao, Weikun

AU - Wang, Xiaomao

AU - Yang, Hongwei

AU - Xie, Yuefeng F.

AU - Komarneni, Sridhar

AU - Yu, Gang

AU - Wang, Yujue

PY - 2018/3/1

Y1 - 2018/3/1

N2 - The electro-peroxone (E-peroxone) process is an emerging ozone-based electrochemical advanced oxidation process that combines conventional ozonation with in-situ cathodic hydrogen peroxide (H2O2) production for oxidative water treatment. In this study, the effects of the E-peroxone pretreatment on disinfection by-product (DBP) formation from chlorination of a synthetic surface water were investigated and compared to conventional ozonation. Results show that due to the enhanced transformation of ozone (O3) to hydroxyl radicals ([rad]OH) by electro-generated H2O2, the E-peroxone process considerably enhanced dissolved organic carbon (DOC) abatement and significantly reduced bromate (BrO3 −) formation compared to conventional ozonation. However, natural organic matter (NOM) with high UV254 absorbance, which is the major precursors of chlorination DBPs, was less efficiently abated during the E-peroxone process than conventional ozonation. Consequently, while both conventional ozonation and the E-peroxone process substantially reduced the formation of DBPs (trihalomethanes and haloacetic acids) during post-chlorination, higher DBP concentrations were generally observed during chlorination of the E-peroxone pretreated waters than conventional ozonation treated. In addition, because of conventional ozonation or the E-peroxone treatment, DBPs formed during post-chlorination shifted to more brominated species. The overall yields of brominated DBPs exhibited strong correlations with the bromide concentrations in water. Therefore, while the E-peroxone process can effectively suppress bromide transformation to bromate, it may lead to higher formation of brominated DBPs during post-chlorination compared to conventional ozonation. These results suggest that the E-peroxone process can lead to different DBP formation and speciation during water treatment trains compared to conventional ozonation.

AB - The electro-peroxone (E-peroxone) process is an emerging ozone-based electrochemical advanced oxidation process that combines conventional ozonation with in-situ cathodic hydrogen peroxide (H2O2) production for oxidative water treatment. In this study, the effects of the E-peroxone pretreatment on disinfection by-product (DBP) formation from chlorination of a synthetic surface water were investigated and compared to conventional ozonation. Results show that due to the enhanced transformation of ozone (O3) to hydroxyl radicals ([rad]OH) by electro-generated H2O2, the E-peroxone process considerably enhanced dissolved organic carbon (DOC) abatement and significantly reduced bromate (BrO3 −) formation compared to conventional ozonation. However, natural organic matter (NOM) with high UV254 absorbance, which is the major precursors of chlorination DBPs, was less efficiently abated during the E-peroxone process than conventional ozonation. Consequently, while both conventional ozonation and the E-peroxone process substantially reduced the formation of DBPs (trihalomethanes and haloacetic acids) during post-chlorination, higher DBP concentrations were generally observed during chlorination of the E-peroxone pretreated waters than conventional ozonation treated. In addition, because of conventional ozonation or the E-peroxone treatment, DBPs formed during post-chlorination shifted to more brominated species. The overall yields of brominated DBPs exhibited strong correlations with the bromide concentrations in water. Therefore, while the E-peroxone process can effectively suppress bromide transformation to bromate, it may lead to higher formation of brominated DBPs during post-chlorination compared to conventional ozonation. These results suggest that the E-peroxone process can lead to different DBP formation and speciation during water treatment trains compared to conventional ozonation.

UR - http://www.scopus.com/inward/record.url?scp=85038012021&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85038012021&partnerID=8YFLogxK

U2 - 10.1016/j.watres.2017.12.019

DO - 10.1016/j.watres.2017.12.019

M3 - Article

C2 - 29247948

AN - SCOPUS:85038012021

VL - 130

SP - 322

EP - 332

JO - Water Research

JF - Water Research

SN - 0043-1354

ER -