The microbial degradation of 2,4,6-tribromophenol (TBP) in water/sediments interface: Investigating bioaugmentation using Bacillus sp. GZT
| Autor: | Guiying Li, Jukun Xiong, Taicheng An |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Geologic Sediments Bioaugmentation Environmental Engineering genetic processes Bacillus 010501 environmental sciences Biology 01 natural sciences Microbiology 2 4 6-Tribromophenol Biostimulation 03 medical and health sciences chemistry.chemical_compound Phenols RNA Ribosomal 16S Environmental Chemistry Yeast extract Microbial biodegradation Waste Management and Disposal Flame Retardants 0105 earth and related environmental sciences Water Biodegradation Pollution Pentachlorophenol Biodegradation Environmental 030104 developmental biology chemistry Sodium propionate Environmental chemistry Metagenome |
| Zdroj: | Science of The Total Environment. 575:573-580 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2016.09.017 |
| Popis: | The substance 2,4,6-Tribromophenol (TBP) is used as a flame retardant in electronic and electric devices, and is a replacement for pentachlorophenol in wood preservation. TBP is a contaminant in different environmental matrices, at levels where treatment is required. This study examined the relationship between the bioaugmention of TBP degradation and the evolution of the microbial community in river water/sediment microcosms. When compared with unamended controls, bioaugmentation with Bacillus sp. GZT effectively enhanced TBP biodegradation, with approximately 40.7% of the TBP removal after a 7-week incubation period, without a lag phase (p0.01). Amendments with 2-bromophenol, 2,6-dibromophenol, and 2,4-dibromophenol did not promote TBP biodegradation in river water/sediments (p0.05). However, TBP biodegradation was enhanced by adding other additives, including NaCl, humic acid, sodium lactate, and sodium propionate alone, especially glucose and yeast extract. A metagenomics analysis of the total 16S rRNA genes from the treatment system with bioaugmentation showed that four microbial phyla were dominant: Proteobacteria (52.08-66.22%), Actinobacteria (20.03-5.47%), Bacteroidetes (6.68-13.68%), and Firmicutes (4.53-20.83%). This study highlights the possible benefits using bioaugmentation with GZT to remediate TBP-polluted water and sediments. |
| Databáze: | OpenAIRE |
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