Oxidation of polynuclear aromatic hydrocarbons in water .3. UV radiation combined with hydrogen peroxide

被引：87

作者：

Beltran, FJ ^{[1
]}

Ovejero, G ^{[1
]}

Rivas, J ^{[1
]}

机构：

[1] UNIV COMPLUTENSE,DEPT INGN QUIM,E-28040 MADRID,SPAIN

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 1996年 / 35卷 / 03期

关键词：

D O I：

10.1021/ie950363l

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Oxidation in water of three polynuclear aromatic hydrocarbons (PAHs), fluorene, phenanthrene, and acenaphthene, with UV radiation combined with hydrogen peroxide has been studied. The effect of hydrogen peroxide concentration, pH, and bicarbonate ion has been investigated. Disappearance rates of PAHs are substantially increased with respect to those from UV radiation alone if proper conditions of hydrogen peroxide concentration and pH arc!established. Direct photolysis contribution decreases with the increasing hydrogen peroxide concentration and is the main way of degradation at acid pH (76% at pH 2 with 10(-3) M hydrogen peroxide concentration, for fluorene oxidation). Rate constants of reactions between the hydroxyl radical and PAHs were found to be 9.9 x 10(9), 8.8 x 10(9), and 13.4 x 10(9) M(-1) s(-1), for fluorene, acenaphthene, and phenanthrene, respectively. Both UV radiation and UV/H2O2 oxidation of PAHs yield numerous intermediate compounds. Most of these compounds disappear as oxidation time is increased.

引用

页码：883 / 890

页数：8

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