Biodegradability of hydroxylated derivatives of commercial polychlorobiphenyls mixtures by Rhodococcus-strains
| Autor: | Tatyana I. Gorbunova, Viсtor I. Saloutin, Marina G. Pervova, Oleg N. Chupakhin, V. A. Demakov, Tatyana D. Kir’yanova, D. O. Egorova |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Biphenyl
021110 strategic defence & security studies Environmental Engineering Chromatography biology Health Toxicology and Mutagenesis 0211 other engineering and technologies Chemical modification 02 engineering and technology 010501 environmental sciences Biodegradation biology.organism_classification Polychlorinated Biphenyls 01 natural sciences Pollution chemistry.chemical_compound Transformation (genetics) chemistry Rhodococcus Environmental Chemistry Waste Management and Disposal IC50 0105 earth and related environmental sciences |
| Zdroj: | Journal of Hazardous Materials. 400:123328 |
| ISSN: | 0304-3894 |
| DOI: | 10.1016/j.jhazmat.2020.123328 |
| Popis: | For the first time, investigations are is carried out for the interactions of hydroxylated polychlorobiphenyls (HO-PCBs) mixtures, which were obtained from PCBs commercially available under the trade name Sovol, with the Rhodococcus (R.) strains. It is established that the HO-PCBs mixtures containing basic products within the range of 83.2–95.8% cause a toxic effect on the growth of R. wratislaviensis KT112-7, R. wratislaviensis CH628, R. ruber P25 strains. The inhibitory concentration (IC50) was varied within the range of 30–490 mg/l. For the first time, it is found that the bacterial strains can use HO-PCBs as a source of carbon with no co-substrate added. The strains are shown to degrade 95.5–100% of the HO-PCBs mixtures at a concentration of 0.1 g/l during 14 days. It is demonstrated that HO-PCBs degrading occurs following the classical bacterial pathway of transforming biphenyl/PCB. However, the HO-PCBs metabolites, which are substituted benzoic acids, are not the final products of the transformation and are subjected to further degrading by the strains. Therefore, the R. wratislaviensis KT112-7, R. wratislaviensis CH628, and R. ruber P25 strains are shown to degrade the HO-PCBs mixtures efficiently and are found to be stable to their toxic action. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect