Degradation of dibromophenols by UV irradiation

We examined the degradation of dibromophenols （DBPs）, i.e. 2,4-DBP, 2,6-DBP and 3,5-DBP by ultraviolet （UV） irradiation and estimated the relationship between degradability and molecular orbital properties of each dibromopbenol. The removal of DBPs under a UV lamp system was successfully performed i...

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Published inJournal of environmental sciences (China) Vol. 26; no. 6; pp. 1284 - 1288
Main Authors Katayama-Hirayama, Keiko, Toda, Naoki, Tauchi, Akihiko, Fujioka, Atsushi, Akitsu, Tetsuya, Kaneko, Hidehiro, Hirayama, Kimiaki
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 01.06.2014
Subjects
bromide ion
Bromides
Carbon
Degradation
Density
Dibromophenol
DOC
Irradiation
Mineralization
Molecular orbitals
Molecular Structure
Phenols - chemistry
Phenols - radiation effects
Ultraviolet Rays
UV irration
Water Pollutants, Chemical - chemistry
Water Pollutants, Chemical - radiation effects
分子轨道
可降解性
消毒副产物
溴离子
溶解有机碳
紫外线照射
退化
释放速度
dibromophenol
DOC
mineralization
bromide ion
UV irration
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Summary:We examined the degradation of dibromophenols （DBPs）, i.e. 2,4-DBP, 2,6-DBP and 3,5-DBP by ultraviolet （UV） irradiation and estimated the relationship between degradability and molecular orbital properties of each dibromopbenol. The removal of DBPs under a UV lamp system was successfully performed in an aqueous solution. After 5 min of irradiation, the initial DBPs concentration of 20 mg/L was decreased to below 1 mg/L, and about 60% of bromide ion was released. A decrease in the concentration of dissolved organic carbon （DOC） suggested the mineralization of DBPs, The mineralization may occur after release of bromide ions because the decrease of DOC was slower than the release of bromide ions. The degradability of 3,5-DBP was slightly lower than 2,6-DBP and 2,4-DBE Molecular orbital calculation suggested that the electrophilic frontier density and the highest occupied molecular orbital （HOMO） energy may be related to the degradability of DBPs.
Bibliography:bromide ion dibromophenol DOC mineralization UV irration
We examined the degradation of dibromophenols （DBPs）, i.e. 2,4-DBP, 2,6-DBP and 3,5-DBP by ultraviolet （UV） irradiation and estimated the relationship between degradability and molecular orbital properties of each dibromopbenol. The removal of DBPs under a UV lamp system was successfully performed in an aqueous solution. After 5 min of irradiation, the initial DBPs concentration of 20 mg/L was decreased to below 1 mg/L, and about 60% of bromide ion was released. A decrease in the concentration of dissolved organic carbon （DOC） suggested the mineralization of DBPs, The mineralization may occur after release of bromide ions because the decrease of DOC was slower than the release of bromide ions. The degradability of 3,5-DBP was slightly lower than 2,6-DBP and 2,4-DBE Molecular orbital calculation suggested that the electrophilic frontier density and the highest occupied molecular orbital （HOMO） energy may be related to the degradability of DBPs.
11-2629/X
ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:1001-0742
1878-7320
DOI:10.1016/s1001-0742(13)60600-2