ArticleEnvironmental science and pollution research international2014
Comparison of phenanthrene biodegradation by free and immobilized cell systems: formation of hydroxylated compounds.
Article in Environmental science and pollution research international, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 32 citations in OpenAlex.
- Article
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- Immobilization of Biomass Materials for Removal of Refractory Organic Pollutants from Wastewater.International journal of environmental research and public health · 2022Review
- Influence of Membrane Vibration on Particles Rejection Using a Slotted Pore Membrane Microfiltration.Membranes · 2021Article
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Authors and funding
2 authors at 1 institution in 1 country.
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Abstract
One of the foremost environmental issues having a key role in the feasibility study of polycyclic aromatic hydrocarbons (PAHs) biodegradation is the concern of the toxicity of the formed intermediate metabolites. In this study, biodegradability of phenanthrene (PHE) at initial concentrations of 100-500 ppm and its hydroxylated intermediate metabolites (IMs) in aqueous phase were investigated using free cells (FC) and immobilized cells (IC) in polyvinyl alcohol (PVA) cryogel beads. Results showed that both FC and IC systems were capable of complete PHE biodegradation at initial concentrations lower than 250 ppm after 7 days, though IC system showed a higher PHE removal rate. The maximum IM concentrations observed at initial PHE concentrations of 100 and 250 ppm were 20 and 49 ppm for FC system, whereas 7.4 and 19 ppm were obtained for IC system, respectively, and IMs were finally removed after 7 days. Similarly, at 500 ppm, IC system resulted in higher removal of PHE compared to FC system. However, during the 7-day period for FC system, IMs concentration rose up to 59 ppm, while for IC system, IMs concentration reaches a maximum at day 5 and thereafter it follows a negative rate. It was also shown that resorcinol as an indicator of hydroxylated aromatic metabolites at concentrations of 0-100 ppm can well be biodegraded by free and immobilized cell systems. No prohibition on PHE biodegradation could hence occur due to IMs formation. Additionally, stability of IC system was examined in repeated-batch cultures, showing the effective removal of PHE up to nine reuse cycles.
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