Effects of nitrate on the UV photolysis of H2O2 for 2,4-dichlorophenol degradation in treated effluents

K. B. Ko, J. Y. Lee, Y. H. Yoon, T. H. Moon, Y. H. Ahn, C. G. Park, K. S. Min, Joonhong Park

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The major objective of this study was to delineate the effect of nitrate on the UV oxidation of 2,4-DCP by conducting a bench-scale operation at various reaction times, and initial concentrations of H2O2 and NO-3. 2,4-DCP (20±5 μg/L) was oxidized in very limited amounts through direct UV photolysis, without additional oxidation by hydroxyl radicals. However, it was completely oxidized with an initial H2O2 concentration of 20 mg/L at a reaction time of 1.0 min under the operating conditions described below. The practical reaction time for 80% oxidation turned out to be 2.0 min (with a high UV dose) with an initial H2O2 concentration of 10 mg/L. Nitrate enhanced the 2,4-DCP oxidation by the hydroxyl radicals produced from nitrate photolysis with the relatively low initial H2O2 concentrations of 0.0 to 5 mg/L, but hindered the oxidation, when an initial H2O2 concentration in the reactor was less than or around about 10 mg/L. The adverse effect of nitrate on the 2,4-DCP oxidation was not observed with a relatively high initial H2O2 concentration of 20 mg/L at the reaction times of 1.0 to 2.0 min. The scavenging effect of nitrate on the 2,4-DCP oxidation was generally limited with the concentration ranges tested in this study.

Original languageEnglish
Pages (from-to)6-11
Number of pages6
JournalDesalination and Water Treatment
Volume2
Issue number1-3
DOIs
Publication statusPublished - 2009 Jan 1

Fingerprint

Photolysis
photolysis
Effluents
Nitrates
effluent
nitrate
oxidation
Degradation
Oxidation
degradation
hydroxyl radical
Scavenging
effect

All Science Journal Classification (ASJC) codes

  • Water Science and Technology
  • Ocean Engineering
  • Pollution

Cite this

Ko, K. B. ; Lee, J. Y. ; Yoon, Y. H. ; Moon, T. H. ; Ahn, Y. H. ; Park, C. G. ; Min, K. S. ; Park, Joonhong. / Effects of nitrate on the UV photolysis of H2O2 for 2,4-dichlorophenol degradation in treated effluents. In: Desalination and Water Treatment. 2009 ; Vol. 2, No. 1-3. pp. 6-11.
@article{9beeb1f570cd48a99374a0d8fee31286,
title = "Effects of nitrate on the UV photolysis of H2O2 for 2,4-dichlorophenol degradation in treated effluents",
abstract = "The major objective of this study was to delineate the effect of nitrate on the UV oxidation of 2,4-DCP by conducting a bench-scale operation at various reaction times, and initial concentrations of H2O2 and NO-3. 2,4-DCP (20±5 μg/L) was oxidized in very limited amounts through direct UV photolysis, without additional oxidation by hydroxyl radicals. However, it was completely oxidized with an initial H2O2 concentration of 20 mg/L at a reaction time of 1.0 min under the operating conditions described below. The practical reaction time for 80{\%} oxidation turned out to be 2.0 min (with a high UV dose) with an initial H2O2 concentration of 10 mg/L. Nitrate enhanced the 2,4-DCP oxidation by the hydroxyl radicals produced from nitrate photolysis with the relatively low initial H2O2 concentrations of 0.0 to 5 mg/L, but hindered the oxidation, when an initial H2O2 concentration in the reactor was less than or around about 10 mg/L. The adverse effect of nitrate on the 2,4-DCP oxidation was not observed with a relatively high initial H2O2 concentration of 20 mg/L at the reaction times of 1.0 to 2.0 min. The scavenging effect of nitrate on the 2,4-DCP oxidation was generally limited with the concentration ranges tested in this study.",
author = "Ko, {K. B.} and Lee, {J. Y.} and Yoon, {Y. H.} and Moon, {T. H.} and Ahn, {Y. H.} and Park, {C. G.} and Min, {K. S.} and Joonhong Park",
year = "2009",
month = "1",
day = "1",
doi = "10.5004/dwt.2009.139",
language = "English",
volume = "2",
pages = "6--11",
journal = "Desalination and Water Treatment",
issn = "1944-3994",
publisher = "Taylor and Francis Ltd.",
number = "1-3",

}

Effects of nitrate on the UV photolysis of H2O2 for 2,4-dichlorophenol degradation in treated effluents. / Ko, K. B.; Lee, J. Y.; Yoon, Y. H.; Moon, T. H.; Ahn, Y. H.; Park, C. G.; Min, K. S.; Park, Joonhong.

In: Desalination and Water Treatment, Vol. 2, No. 1-3, 01.01.2009, p. 6-11.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of nitrate on the UV photolysis of H2O2 for 2,4-dichlorophenol degradation in treated effluents

AU - Ko, K. B.

AU - Lee, J. Y.

AU - Yoon, Y. H.

AU - Moon, T. H.

AU - Ahn, Y. H.

AU - Park, C. G.

AU - Min, K. S.

AU - Park, Joonhong

PY - 2009/1/1

Y1 - 2009/1/1

N2 - The major objective of this study was to delineate the effect of nitrate on the UV oxidation of 2,4-DCP by conducting a bench-scale operation at various reaction times, and initial concentrations of H2O2 and NO-3. 2,4-DCP (20±5 μg/L) was oxidized in very limited amounts through direct UV photolysis, without additional oxidation by hydroxyl radicals. However, it was completely oxidized with an initial H2O2 concentration of 20 mg/L at a reaction time of 1.0 min under the operating conditions described below. The practical reaction time for 80% oxidation turned out to be 2.0 min (with a high UV dose) with an initial H2O2 concentration of 10 mg/L. Nitrate enhanced the 2,4-DCP oxidation by the hydroxyl radicals produced from nitrate photolysis with the relatively low initial H2O2 concentrations of 0.0 to 5 mg/L, but hindered the oxidation, when an initial H2O2 concentration in the reactor was less than or around about 10 mg/L. The adverse effect of nitrate on the 2,4-DCP oxidation was not observed with a relatively high initial H2O2 concentration of 20 mg/L at the reaction times of 1.0 to 2.0 min. The scavenging effect of nitrate on the 2,4-DCP oxidation was generally limited with the concentration ranges tested in this study.

AB - The major objective of this study was to delineate the effect of nitrate on the UV oxidation of 2,4-DCP by conducting a bench-scale operation at various reaction times, and initial concentrations of H2O2 and NO-3. 2,4-DCP (20±5 μg/L) was oxidized in very limited amounts through direct UV photolysis, without additional oxidation by hydroxyl radicals. However, it was completely oxidized with an initial H2O2 concentration of 20 mg/L at a reaction time of 1.0 min under the operating conditions described below. The practical reaction time for 80% oxidation turned out to be 2.0 min (with a high UV dose) with an initial H2O2 concentration of 10 mg/L. Nitrate enhanced the 2,4-DCP oxidation by the hydroxyl radicals produced from nitrate photolysis with the relatively low initial H2O2 concentrations of 0.0 to 5 mg/L, but hindered the oxidation, when an initial H2O2 concentration in the reactor was less than or around about 10 mg/L. The adverse effect of nitrate on the 2,4-DCP oxidation was not observed with a relatively high initial H2O2 concentration of 20 mg/L at the reaction times of 1.0 to 2.0 min. The scavenging effect of nitrate on the 2,4-DCP oxidation was generally limited with the concentration ranges tested in this study.

UR - http://www.scopus.com/inward/record.url?scp=71849105336&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=71849105336&partnerID=8YFLogxK

U2 - 10.5004/dwt.2009.139

DO - 10.5004/dwt.2009.139

M3 - Article

VL - 2

SP - 6

EP - 11

JO - Desalination and Water Treatment

JF - Desalination and Water Treatment

SN - 1944-3994

IS - 1-3

ER -