The effect of zerovalent iron on the microbial degradation of hexabromocyclododecane
Journal
Chemosphere
Journal Volume
200
Journal Volume
200
Pages
419-426
Start Page
419
End Page
426
ISSN
00456535
Date Issued
2018-06
Author(s)
Abstract
Hexabromocyclododecane (HBCD), a commonly used brominated flame retardant (BFR), has been listed as a persistent organic pollutant (POP). In order to remediate HBCD in the environment, the influence of microscale zerovalent iron (MZVI) on the HBCD degrading microcosm was evaluated. In the acclimated microcosm collected from river sediment, 49% of HBCD was initially removed through adsorption and then 30% of HBCD was biodegraded through non-debromination processes. In contrast to MZVI only, over 60% of HBCD was gradually degraded by MZVI through a debromination reaction. In the microcosm-MZVI combined system, the biodegradation ability of the microcosm was inhibited. The aqueous chemistry was changed by the addition of MZVI, which led to the alteration of microbial composition and biodegradation ability. These better understandings can facilitate an evaluation of the impact of MZVI on HBCD biodegradation when ZVI was used to remediate this BFR.
Subjects
Biodegradation
Debromination
Hexabromocyclododecane
Microscale zerovalent iron
Sediment
Publisher
Elsevier Ltd
Type
journal article