Inhibition of hydrocarbon bioremediation by lead in a crude oil-contaminated soil

被引：41

作者：

Al-Saleh, ES ^{[1
]}

Obuekwe, C ^{[1
]}

机构：

[1] Kuwait Univ, Fac Sci, Dept Biol Sci, Microbiol Program, Kuwait 13060, Kuwait

来源：

INTERNATIONAL BIODETERIORATION & BIODEGRADATION | 2005年 / 56卷 / 01期

关键词：

bioremediation; hydrocarbons; metal pollution; mineralization;

D O I：

10.1016/j.ibiod.2004.11.003

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Analyses of soil samples revealed that the level of lead (total or bioavailable) was three-fold greater in crude oil contaminated than in uncontaminated Kuwaiti soils. Investigation of the possible inhibitory effect of lead on hydrocarbon degradation by the soil microbiota showed that the number of hydrocarbon-degrading bacteria decreased with increased levels of lead nitrate added to soil samples, whether oil polluted or not. At 1.0 mg lead nitrate g(-1) dry soil, the number of degraders of hexadecane, naphthalene and crude oil declined by 14%, 23% and 53%, respectively. In a similar manner, the degradation and mineralization of different hydrocarbons decreased with increased lead content in cultures, although the decreases were not significantly different (P > 0.05). The dehydrogenase activities of soil samples containing hydrocarbons as substrates also declined with an increase in the lead content of soil samples. (c) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1 / 7

页数：7

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