Abstract
The removal and degradation of polybrominated diphenyl ethers (PBDEs) in sediments are not clear. The vertical distribution of total and dehalogenating bacteria in sediment cores collected from a typical mangrove swamp in South China and their intrinsic degradation potential were investigated. These bacterial groups had the highest abundances in surface sediments (0–5 cm). A 5-months microcosm experiment also showed that surface sediments had the highest rate to remove BDE-47 than deeper sediments (5–30 cm) under anaerobic condition. The deeper sediments, being more anaerobic, had lower population of dehalogenating bacteria leading to a weaker BDE-47 removal potential than surface sediments. Stepwise multiple regression analysis indicated that Dehalococcoides spp. were the most important dehalogenating bacteria affecting the anaerobic removal of BDE-47 in mangrove sediments. This is the first study reporting that mangrove sediments harbored diverse groups of dehalogenating bacteria and had intrinsic potential to remove PBDE contamination.
Original language | English |
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Pages (from-to) | 1055-1062 |
Number of pages | 8 |
Journal | Marine Pollution Bulletin |
Volume | 124 |
Issue number | 2 |
DOIs | |
Publication status | Published - 30 Nov 2017 |
Externally published | Yes |
Keywords
- Anaerobic degradation
- Functional bacteria
- Mangrove
- PBDEs