Abstract
Polycyclic aromatic hydrocarbons (PAHs) are harmful persistent organic pollutants, while the high-molecular-weight (HMW) PAHs are even more detrimental to the environment and human health. However, microbial anaerobic degradation of HMW PAHs has rarely been reported. One facultative anaerobe Pseudomonas sp. JP1 was isolated from Shantou Bay, Shantou, China, which could degrade a variety of HMW PAHs. After 40 days cultivation with strain JP1, anaerobic biodegradation rate of benzo[a]pyrene (BaP), fluoranthene, and phenanthrene was 30, 47, and 5 %, respectively. Consumption of nitrate as the electron acceptor was confirmed by N-(1-naphthyl) ethylenediamine spectrophotometry. Supplementation of sodium sulfite, maltose, or glycine, and in a salinity of 0–20 ‰ significantly stimulated anaerobic degradation of BaP. Lastly, the anaerobic degradation metabolites of BaP by strain JP1 were investigated using GC/MS, and the degradation pathway was proposed. This study is helpful for further studies on the mechanism of anaerobic biodegradation of PAHs.
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Acknowledgments
This work was supported partly by National Science Foundation of China (Nos.41076073, 30970106).We thank Mrs. Xiaoshan Zhang, Mr. Tufeng Chen for assistance in GC/MS and HPLC analysis. We are grateful to Prof. Guangming Xiong (Kiel University) for helpful suggestions.
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Liang, L., Song, X., Kong, J. et al. Anaerobic biodegradation of high-molecular-weight polycyclic aromatic hydrocarbons by a facultative anaerobe Pseudomonas sp. JP1. Biodegradation 25, 825–833 (2014). https://doi.org/10.1007/s10532-014-9702-5
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DOI: https://doi.org/10.1007/s10532-014-9702-5