Evaluating and elucidating the formation of nitrogen-contained disinfection by-products during pre-ozonation and chlorination

Pen Chi Chiang, E. E. Chang, Chao Chin Chuang, Chung Huei Liang, Chin Pao Huang

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The effects of pre-ozonation on the formation of haloacetonitriles (HANs), trichloronitromethane (TCNM), and haloketones (HKs) during chlorination were evaluated. Ozone dose used in this study was 8.0, 10.0 and 25.0mg O3/min. Results showed high UV254 reduction (>80%) and relatively low dissolved organic carbon removal (40-70%) after ozonation, indicating that ozone might change significantly the chemical properties of natural organic matter presented in the raw water. Undesired ozonation by-products such as aldehydes and ketones were also formed during ozonation. At high ozone dose of 25.0mg O3/min, the formation of dichloroacetonitrile and bromochloroacetonitrile were reduced significantly. Chlorination of the ozonated water formed high concentration of TCNM and HKs were 8-10 and 31-48μg/L, respectively. It was also found that continuous hydrolysis at longer reaction time rapidly decreased the formation of HKs. Ozonation prior to chlorination practice exhibited a negative effect on TCNM and HKs reduction. A model based on the dissolved organic carbon and chlorine decay was developed not only for determining the reaction rate constants, e.g. formation and hydrolysis of HANs, HKs and TCNM, but also for interpreting the mechanisms of formation and hydrolysis for HANs, HKs and TCNM during the chlorination of natural organic matter.

Original languageEnglish
Pages (from-to)327-333
Number of pages7
JournalChemosphere
Volume80
Issue number3
DOIs
Publication statusPublished - Jun 2010

Fingerprint

Ozonization
Disinfection
Chlorination
Halogenation
chlorination
disinfection
Byproducts
Nitrogen
Ozone
nitrogen
hydrolysis
Hydrolysis
ozone
Organic carbon
Biological materials
dissolved organic carbon
Carbon
organic matter
Water
Chlorine

Keywords

  • Disinfection by-product (DBP)
  • Haloacetonitriles (HAN)
  • Haloketones (HK)
  • Pre-ozonation
  • Trichloronitromethane (TCNM)

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemistry(all)

Cite this

Evaluating and elucidating the formation of nitrogen-contained disinfection by-products during pre-ozonation and chlorination. / Chiang, Pen Chi; Chang, E. E.; Chuang, Chao Chin; Liang, Chung Huei; Huang, Chin Pao.

In: Chemosphere, Vol. 80, No. 3, 06.2010, p. 327-333.

Research output: Contribution to journalArticle

Chiang, Pen Chi ; Chang, E. E. ; Chuang, Chao Chin ; Liang, Chung Huei ; Huang, Chin Pao. / Evaluating and elucidating the formation of nitrogen-contained disinfection by-products during pre-ozonation and chlorination. In: Chemosphere. 2010 ; Vol. 80, No. 3. pp. 327-333.
@article{33a72b93438347ec80ce3cbf843fd275,
title = "Evaluating and elucidating the formation of nitrogen-contained disinfection by-products during pre-ozonation and chlorination",
abstract = "The effects of pre-ozonation on the formation of haloacetonitriles (HANs), trichloronitromethane (TCNM), and haloketones (HKs) during chlorination were evaluated. Ozone dose used in this study was 8.0, 10.0 and 25.0mg O3/min. Results showed high UV254 reduction (>80{\%}) and relatively low dissolved organic carbon removal (40-70{\%}) after ozonation, indicating that ozone might change significantly the chemical properties of natural organic matter presented in the raw water. Undesired ozonation by-products such as aldehydes and ketones were also formed during ozonation. At high ozone dose of 25.0mg O3/min, the formation of dichloroacetonitrile and bromochloroacetonitrile were reduced significantly. Chlorination of the ozonated water formed high concentration of TCNM and HKs were 8-10 and 31-48μg/L, respectively. It was also found that continuous hydrolysis at longer reaction time rapidly decreased the formation of HKs. Ozonation prior to chlorination practice exhibited a negative effect on TCNM and HKs reduction. A model based on the dissolved organic carbon and chlorine decay was developed not only for determining the reaction rate constants, e.g. formation and hydrolysis of HANs, HKs and TCNM, but also for interpreting the mechanisms of formation and hydrolysis for HANs, HKs and TCNM during the chlorination of natural organic matter.",
keywords = "Disinfection by-product (DBP), Haloacetonitriles (HAN), Haloketones (HK), Pre-ozonation, Trichloronitromethane (TCNM)",
author = "Chiang, {Pen Chi} and Chang, {E. E.} and Chuang, {Chao Chin} and Liang, {Chung Huei} and Huang, {Chin Pao}",
year = "2010",
month = "6",
doi = "10.1016/j.chemosphere.2010.03.053",
language = "English",
volume = "80",
pages = "327--333",
journal = "Chemosphere",
issn = "0045-6535",
publisher = "Elsevier Limited",
number = "3",

}

TY - JOUR

T1 - Evaluating and elucidating the formation of nitrogen-contained disinfection by-products during pre-ozonation and chlorination

AU - Chiang, Pen Chi

AU - Chang, E. E.

AU - Chuang, Chao Chin

AU - Liang, Chung Huei

AU - Huang, Chin Pao

PY - 2010/6

Y1 - 2010/6

N2 - The effects of pre-ozonation on the formation of haloacetonitriles (HANs), trichloronitromethane (TCNM), and haloketones (HKs) during chlorination were evaluated. Ozone dose used in this study was 8.0, 10.0 and 25.0mg O3/min. Results showed high UV254 reduction (>80%) and relatively low dissolved organic carbon removal (40-70%) after ozonation, indicating that ozone might change significantly the chemical properties of natural organic matter presented in the raw water. Undesired ozonation by-products such as aldehydes and ketones were also formed during ozonation. At high ozone dose of 25.0mg O3/min, the formation of dichloroacetonitrile and bromochloroacetonitrile were reduced significantly. Chlorination of the ozonated water formed high concentration of TCNM and HKs were 8-10 and 31-48μg/L, respectively. It was also found that continuous hydrolysis at longer reaction time rapidly decreased the formation of HKs. Ozonation prior to chlorination practice exhibited a negative effect on TCNM and HKs reduction. A model based on the dissolved organic carbon and chlorine decay was developed not only for determining the reaction rate constants, e.g. formation and hydrolysis of HANs, HKs and TCNM, but also for interpreting the mechanisms of formation and hydrolysis for HANs, HKs and TCNM during the chlorination of natural organic matter.

AB - The effects of pre-ozonation on the formation of haloacetonitriles (HANs), trichloronitromethane (TCNM), and haloketones (HKs) during chlorination were evaluated. Ozone dose used in this study was 8.0, 10.0 and 25.0mg O3/min. Results showed high UV254 reduction (>80%) and relatively low dissolved organic carbon removal (40-70%) after ozonation, indicating that ozone might change significantly the chemical properties of natural organic matter presented in the raw water. Undesired ozonation by-products such as aldehydes and ketones were also formed during ozonation. At high ozone dose of 25.0mg O3/min, the formation of dichloroacetonitrile and bromochloroacetonitrile were reduced significantly. Chlorination of the ozonated water formed high concentration of TCNM and HKs were 8-10 and 31-48μg/L, respectively. It was also found that continuous hydrolysis at longer reaction time rapidly decreased the formation of HKs. Ozonation prior to chlorination practice exhibited a negative effect on TCNM and HKs reduction. A model based on the dissolved organic carbon and chlorine decay was developed not only for determining the reaction rate constants, e.g. formation and hydrolysis of HANs, HKs and TCNM, but also for interpreting the mechanisms of formation and hydrolysis for HANs, HKs and TCNM during the chlorination of natural organic matter.

KW - Disinfection by-product (DBP)

KW - Haloacetonitriles (HAN)

KW - Haloketones (HK)

KW - Pre-ozonation

KW - Trichloronitromethane (TCNM)

UR - http://www.scopus.com/inward/record.url?scp=77953339976&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77953339976&partnerID=8YFLogxK

U2 - 10.1016/j.chemosphere.2010.03.053

DO - 10.1016/j.chemosphere.2010.03.053

M3 - Article

C2 - 20427073

AN - SCOPUS:77953339976

VL - 80

SP - 327

EP - 333

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

IS - 3

ER -