期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 19, 页码 9162-9166出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.06.070
关键词
Biodesulphurisation; Fossil fuels; Gordonia alkanivorans; Rhodococcus erythropolis; Toxicity
资金
- FCT (Fundacao para a Ciencia e a Tecnologia) [PTDC/AAC-AMB/112841/2009]
- Fundação para a Ciência e a Tecnologia [PTDC/AAC-AMB/112841/2009] Funding Source: FCT
The acute toxicity of some compounds used in fossil fuels biodesulphurisation studies, on the respiration activity, was evaluated by Gordonia alkanivorans and Rhodococcus erythropolis. Moreover, the effect of 2-hydroxybiphenyl on cell growth of both strains was also determined, using batch (chronic bioassays) and continuous cultures. The IC50 values obtained showed the toxicity of all the compounds tested to both strains, specially the high toxicity of 2-HBP. These results were confirmed by the chronic toxicity data. The toxicity data sets highlight for a higher sensitivity to the toxicant by the strain presenting a lower growth rate, due to a lower cells number in contact with the toxicant. Thus, microorganisms exhibiting faster generation times could be more resistant to 2-HBP accumulation during a BDS process. The physiological response of both strains to 2-HBP pulse in a steady-state continuous culture shows their potential to be used in a future fossil fuel BDS process. (C) 2011 Elsevier Ltd. All rights reserved.
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