Combined UV-biological degradation of PAHs

被引：72

作者：

Guieysse, B ^{[1
]}

Viklund, G ^{[1
]}

Toes, AC ^{[1
]}

Mattiasson, B ^{[1
]}

机构：

[1] Lund Univ, Dept Biotechnol, S-22100 Lund, Sweden

来源：

CHEMOSPHERE | 2004年 / 55卷 / 11期

关键词：

photolysis; photodegradation; biodegradation; two-phase partitioning bioreactor; biphasic;

D O I：

10.1016/j.chemosphere.2004.01.021

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The UV-photolysis of PAHs was tested in silicone oil and tetradecane. In most cases, the degradation of a pollutant provided within a mixture was lower than when provided alone due to competitive effects. With the exception of anthracene, the larger pollutants (4- and 5-rings) were always degraded first, proving that UV-treatment preferentially acts on large PAHs and thereby provides a good complement to microbial degradation. UV-photolysis was also found to be suitable for treatment of soil extract from contaminated soils. The feasibility of UV-biological treatment was demonstrated for the removal of a mixture of phenanthrene and pyrene in silicone oil. UV-irradiation of the silicone oil led to 83% pyrene removal but no phenanthrene photodegradation. Subsequent treatment of the oil in a two-phases partitioning bioreactor (TPPB) system inoculated with Pseudomonas sp. was followed by complete phenanthrene biodegradation but no further pyrene removal. Totally, the combined process allowed 92% removal of the PAH mixture. Further work should focus on characterizing the photoproducts formed and studying the influence of the solvent on the photodegradation process. (c) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1493 / 1499

页数：7

共 33 条

[1] Photochemical degradation of PAHs in freshwaters and their impact on bacterial growth - influence of water chemistry [J].