Catalysis of PAH biodegradation by humic acid shown in synchrotron infrared studies

被引：92

作者：

Holman, HYN ^{[1
]}

Nieman, K

Sorensen, DL

Miller, CD

Martin, MC

Borch, T

McKinney, WR

Sims, RC

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Environm Biotechnol, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source Div, Berkeley, CA 94720 USA

[3] Utah State Univ, Utah Water Res Lab, Logan, UT 84321 USA

[4] Utah State Univ, Dept Biol, Logan, UT 84321 USA

[5] Montana State Univ, Ctr Biofilm Engn, Bozeman, MT 59717 USA

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2002年 / 36卷 / 06期

关键词：

D O I：

10.1021/es0157200

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The role of humic acid (HA) in the biodegradation of toxic polycyclic aromatic hydrocarbons (PAHs) has been the subject of controversy, particularly in unsaturated environments, By utilizing an infrared spectromicroscope and a very bright, nondestructive synchrotron photon source, we monitored in situ and, over time, the influence of HA on the progression of degradation of pyrene (a model PAH) by a bacterial colony on a magnetite surface. Our results indicate that HA dramatically shortens the onset time for PAH biodegradation from 168 to 2 h. In the absence of HA, it takes the bacteria about 168 h to produce sufficient glycolipids to solubilize pyrene and make it bioavailable for biodegradation. These results will have large implications for the bioremediation of contaminated soils.

引用

页码：1276 / 1280

页数：5

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