Journal
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Volume 125, Issue -, Pages 55-60Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2015.11.032
Keywords
Cell wall component; Cosolvent; Rhizopus oryzae; Partition coefficient; Polycyclic aromatic hydrocarbons
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Funding
- National Natural Science Foundation of China [41090284, 41301333]
- Fundamental Research Funds for the Central Universities
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The contribution of different fungal cell wall components in adsorption of polycyclic aromatic hydrocarbons (PAHs) is still unclear. We isolated Rhizopus oryzae cell walls components with sequential extraction, characterized functional groups with NEXAFS spectra, and determined partition coefficients of PAHs on cell walls and cell wall components with cosolvent model. Spectra of NEXAFS indicated that isolated cell walls components were featured with peaks at similar to 532.7 and similar to 534.5 eV energy. The lipid cosolvent partition coefficients were approximately one order of magnitude higher than the corresponding carbohydrate cosolvent partition coefficients. The partition coefficients for four tested carbohydrates varied at approximate 0.5 logarithmic units. Partition coefficients between biosorbents and water calculated based cosolvent models ranged from 0.8 to 4.2. The present study proved the importance of fungal cell wall components in adsorption of PAHs, and consequently the role of fungi in PAHs bioremediation. (C) 2015 Elsevier Inc. All rights reserved.
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