Comparative study of the UV and UV/VUV-induced photolysis of phenol in aqueous solution

Tünde Alapi, A. Dombi

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

The UV (254 nm) and UV/VUV (254/185 nm) photolysis of phenol and the distribution of the products in solutions saturated with oxygen or nitrogen were investigated and compared. The initial rate of degradation of phenol in UV/VUV-irradiated solutions exceeded that determined in UV-irradiated solutions, but the difference decreased dramatically with increase of the initial phenol concentration. The effects of methanol as HO{radical dot} scavenger demonstrated that the relative contribution of the HO{radical dot}-based reactions to the decomposition of phenol in UV/VUV-irradiated solutions decreased strongly with increase of the initial phenol concentration. The same aromatic (1,2- and 1,4-dihydroxybenzene) and aliphatic (maleic, malic, tartaric and oxalic acids) intermediates were detected in UV- and UV/VUV-irradiated solutions saturated with oxygen. The decompositions of 1,2- and 1,4-dihydroxybenzene, 1,4-benzoquinone and oxalic acid were also investigated both in UV/VUV- and in UV-irradiated solutions.

Original languageEnglish
Pages (from-to)409-418
Number of pages10
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume188
Issue number2-3
DOIs
Publication statusPublished - May 20 2007

Fingerprint

Photolysis
Phenol
phenols
Phenols
photolysis
aqueous solutions
acids
oxalic acid
Oxalic acid
Oxygen
Decomposition
decomposition
Oxalic Acid
Oxalates
quinones
oxygen
Methanol
Nitrogen
methyl alcohol
degradation

Keywords

  • 185 nm
  • 254 nm
  • Hydroxyl radical
  • Phenol
  • Phenoxyl radical

ASJC Scopus subject areas

  • Bioengineering
  • Physical and Theoretical Chemistry

Cite this

Comparative study of the UV and UV/VUV-induced photolysis of phenol in aqueous solution. / Alapi, Tünde; Dombi, A.

In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 188, No. 2-3, 20.05.2007, p. 409-418.

Research output: Contribution to journalArticle

@article{7de85a7e171f49a095bd6a02302ce51e,
title = "Comparative study of the UV and UV/VUV-induced photolysis of phenol in aqueous solution",
abstract = "The UV (254 nm) and UV/VUV (254/185 nm) photolysis of phenol and the distribution of the products in solutions saturated with oxygen or nitrogen were investigated and compared. The initial rate of degradation of phenol in UV/VUV-irradiated solutions exceeded that determined in UV-irradiated solutions, but the difference decreased dramatically with increase of the initial phenol concentration. The effects of methanol as HO{radical dot} scavenger demonstrated that the relative contribution of the HO{radical dot}-based reactions to the decomposition of phenol in UV/VUV-irradiated solutions decreased strongly with increase of the initial phenol concentration. The same aromatic (1,2- and 1,4-dihydroxybenzene) and aliphatic (maleic, malic, tartaric and oxalic acids) intermediates were detected in UV- and UV/VUV-irradiated solutions saturated with oxygen. The decompositions of 1,2- and 1,4-dihydroxybenzene, 1,4-benzoquinone and oxalic acid were also investigated both in UV/VUV- and in UV-irradiated solutions.",
keywords = "185 nm, 254 nm, Hydroxyl radical, Phenol, Phenoxyl radical",
author = "T{\"u}nde Alapi and A. Dombi",
year = "2007",
month = "5",
day = "20",
doi = "10.1016/j.jphotochem.2007.01.002",
language = "English",
volume = "188",
pages = "409--418",
journal = "Journal of Photochemistry and Photobiology A: Chemistry",
issn = "1010-6030",
publisher = "Elsevier",
number = "2-3",

}

TY - JOUR

T1 - Comparative study of the UV and UV/VUV-induced photolysis of phenol in aqueous solution

AU - Alapi, Tünde

AU - Dombi, A.

PY - 2007/5/20

Y1 - 2007/5/20

N2 - The UV (254 nm) and UV/VUV (254/185 nm) photolysis of phenol and the distribution of the products in solutions saturated with oxygen or nitrogen were investigated and compared. The initial rate of degradation of phenol in UV/VUV-irradiated solutions exceeded that determined in UV-irradiated solutions, but the difference decreased dramatically with increase of the initial phenol concentration. The effects of methanol as HO{radical dot} scavenger demonstrated that the relative contribution of the HO{radical dot}-based reactions to the decomposition of phenol in UV/VUV-irradiated solutions decreased strongly with increase of the initial phenol concentration. The same aromatic (1,2- and 1,4-dihydroxybenzene) and aliphatic (maleic, malic, tartaric and oxalic acids) intermediates were detected in UV- and UV/VUV-irradiated solutions saturated with oxygen. The decompositions of 1,2- and 1,4-dihydroxybenzene, 1,4-benzoquinone and oxalic acid were also investigated both in UV/VUV- and in UV-irradiated solutions.

AB - The UV (254 nm) and UV/VUV (254/185 nm) photolysis of phenol and the distribution of the products in solutions saturated with oxygen or nitrogen were investigated and compared. The initial rate of degradation of phenol in UV/VUV-irradiated solutions exceeded that determined in UV-irradiated solutions, but the difference decreased dramatically with increase of the initial phenol concentration. The effects of methanol as HO{radical dot} scavenger demonstrated that the relative contribution of the HO{radical dot}-based reactions to the decomposition of phenol in UV/VUV-irradiated solutions decreased strongly with increase of the initial phenol concentration. The same aromatic (1,2- and 1,4-dihydroxybenzene) and aliphatic (maleic, malic, tartaric and oxalic acids) intermediates were detected in UV- and UV/VUV-irradiated solutions saturated with oxygen. The decompositions of 1,2- and 1,4-dihydroxybenzene, 1,4-benzoquinone and oxalic acid were also investigated both in UV/VUV- and in UV-irradiated solutions.

KW - 185 nm

KW - 254 nm

KW - Hydroxyl radical

KW - Phenol

KW - Phenoxyl radical

UR - http://www.scopus.com/inward/record.url?scp=34247097888&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34247097888&partnerID=8YFLogxK

U2 - 10.1016/j.jphotochem.2007.01.002

DO - 10.1016/j.jphotochem.2007.01.002

M3 - Article

VL - 188

SP - 409

EP - 418

JO - Journal of Photochemistry and Photobiology A: Chemistry

JF - Journal of Photochemistry and Photobiology A: Chemistry

SN - 1010-6030

IS - 2-3

ER -