Comparison of the Effects of Ultraviolet, H2O2/UV and Gamma-Irradiation Processes on Frozen and Liquid Water Solutions of Monochlorophenols

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F03%3A00008224" target="_blank" >RIV/00216224:14310/03:00008224 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Comparison of the Effects of Ultraviolet, H2O2/UV and Gamma-Irradiation Processes on Frozen and Liquid Water Solutions of Monochlorophenols

Original language description

The effects of UV irradiation in the presence or in the absence of hydrogen peroxide as well as of gamma irradiation on 2- and 4-chlorophenol in the solid water ice matrix have been studied and compared to those effects known to occur in aqueous solutions. While UV photolysis (>280 nm) of monochlorophenols provided efficient coupling reactions in ice and photosolvolysis products in liquid water, hydroxylation into chlorobenzenediols is the main pathway in the presence of hydrogen peroxide in both phases. According to the results, the solute molecules accumulate in a layer surrounding the ice crystal walls during the freezing process where they react. Radiation chemistry of chlorophenol ice samples afforded preferably coupling reactions at 78 oC ratherthan reactions with the OH radicals produced by cleavage of water molecules under given conditions (1 kGy h-1). Apparent resemblance of chemistry in the UV/H2O2 treated liquid, solid, and gamma-irradiated liquid and solid samples is discu

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CC - Organic chemistry

OECD FORD branch

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Project

<a href="/en/project/GA205%2F02%2F0896" target="_blank" >GA205/02/0896: Photochemistry of persistent organic compounds in/on ice</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2003

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Photochemical and Photobiological Sciences

ISSN

1474-905X

e-ISSN

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Volume of the periodical

2

Issue of the periodical within the volume

10

Country of publishing house

GB - UNITED KINGDOM

Number of pages

9

Pages from-to

1023

UT code for WoS article

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EID of the result in the Scopus database

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