Ametryn degradation in the ultraviolet (UV) irradiation/hydrogen peroxide (H2O2) treatment

Nai yun Gao, Yang Deng, Dandan Zhao

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

Ultraviolet (UV) irradiation (253.7 nm) in the presence of hydrogen peroxide (H2O2) was used to decompose aqueous ametryn. The concentrations of ametryn were measured with time under various experiment conditions. The investigated factors included H2O2 dosages, initial pH, initial ametryn concentrations, and a variety of inorganic anions. Results showed that ametryn degradation in UV/H2O2 process was a pseudo-first-order reaction. Removal rates of ametryn were greatly affected by H2O2 dosage and initial concentrations of ametryn, but appeared to be slightly influenced by initial pH. Furthermore, we investigated the effects of four anions (SO42-, Cl-, HCO3-, and CO32-) on ametryn degradation by UV/H2O2. The impact of SO42- seemed to be insignificant; however, Cl-, HCO3-, and CO32- considerably slowed down the degradation rate because they could strongly scavenge hydroxyl radicals (OH{radical dot}) produced during the UV/H2O2 process. Finally, a preliminary cost analysis revealed that UV/H2O2 process was more cost-effective than the UV alone in removal of ametryn from water.

Original languageEnglish
Pages (from-to)640-645
Number of pages6
JournalJournal of Hazardous Materials
Volume164
Issue number2-3
DOIs
StatePublished - 30 May 2009

Fingerprint

Hydrogen peroxide
hydrogen peroxide
Hydrogen Peroxide
irradiation
Irradiation
Degradation
degradation
anion
Negative ions
cost analysis
hydroxyl radical
Costs
Anions
Costs and Cost Analysis
cost
ametryne
Water
experiment
Experiments
Hydroxyl Radical

Keywords

  • Ametryn
  • Hydrogen peroxide
  • Oxidation
  • Ultraviolet irradiation

Cite this

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abstract = "Ultraviolet (UV) irradiation (253.7 nm) in the presence of hydrogen peroxide (H2O2) was used to decompose aqueous ametryn. The concentrations of ametryn were measured with time under various experiment conditions. The investigated factors included H2O2 dosages, initial pH, initial ametryn concentrations, and a variety of inorganic anions. Results showed that ametryn degradation in UV/H2O2 process was a pseudo-first-order reaction. Removal rates of ametryn were greatly affected by H2O2 dosage and initial concentrations of ametryn, but appeared to be slightly influenced by initial pH. Furthermore, we investigated the effects of four anions (SO42-, Cl-, HCO3-, and CO32-) on ametryn degradation by UV/H2O2. The impact of SO42- seemed to be insignificant; however, Cl-, HCO3-, and CO32- considerably slowed down the degradation rate because they could strongly scavenge hydroxyl radicals (OH{radical dot}) produced during the UV/H2O2 process. Finally, a preliminary cost analysis revealed that UV/H2O2 process was more cost-effective than the UV alone in removal of ametryn from water.",
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Ametryn degradation in the ultraviolet (UV) irradiation/hydrogen peroxide (H2O2) treatment. / Gao, Nai yun; Deng, Yang; Zhao, Dandan.

In: Journal of Hazardous Materials, Vol. 164, No. 2-3, 30.05.2009, p. 640-645.

Research output: Contribution to journalArticle

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