Degradation of dibromophenols by UV irradiation

被引：7

作者：

Katayama-Hirayama, Keiko ^{[1
]}

Toda, Naoki ^{[1
]}

Tauchi, Akihiko ^{[2
]}

Fujioka, Atsushi ^{[2
]}

Akitsu, Tetsuya ^{[1
]}

Kaneko, Hidehiro ^{[1
]}

Hirayama, Kimiaki ^{[1
]}

机构：

[1] Univ Yamanashi, Interdisciplinary Grad Sch Med & Engn, Kofu, Yamanashi 4008511, Japan

[2] Toshiba Lighting & Technol Corp, Technol Dev Div, Imabari, Ehime 7948510, Japan

来源：

JOURNAL OF ENVIRONMENTAL SCIENCES | 2014年 / 26卷 / 06期

关键词：

bromide ion; dibromophenol; DOC; mineralization; UV irration; BROMINATED FLAME RETARDANTS; TETRABROMOBISPHENOL-A; WATER;

D O I：

10.1016/S1001-0742(13)60600-2

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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 dibromophenol. 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-DBP. 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.

引用

页码：1284 / 1288

页数：5

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