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Co-metabolic degradation and metabolite detection of hexabromocyclododecane by Shewanella oneidensis MR-1
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Co-metabolic degradation and metabolite detection of hexabromocyclododecane by Shewanella oneidensis MR-1
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Journal Article
Co-metabolic degradation and metabolite detection of hexabromocyclododecane by Shewanella oneidensis MR-1
2024
Overview
Hexabromocyclododecane (HBCD) is a widely used brominated flame retardant; however, it is a persistent organic pollutant as well as affects the human thyroid hormones and causes cancer. However, the degradation of HBCD has received little attention from researchers. Due to its bioaccumulative and hazardous properties, an appropriate strategy for its remediation is required. In this study, we investigated the biodegradation of HBCD using
Shewanella oneidensis
MR-1 under optimized conditions. The Box-Behnken design (BBD) was implemented for the optimization of the physical degradation parameters of HBCD.
S. oneidensis
MR-1 showed the best degradation performance at a temperature of 30 °C, pH 7, and agitation speed of 115 rpm, with an HBCD concentration of 1125 μg/L in mineral salt medium (MSM). The strain tolerated up to 2000 μg/L HBCD. Gas chromatography-mass spectrometry analysis identified three intermediates, including 2-bromo dodecane, 2,7,10-trimethyldodecane, and 4-methyl-1-decene. The results provide an insightful understanding of the biodegradation of HBCD by
S. oneidensis
MR-1 under optimized conditions and could pave the way for further eco-friendly applications.
Key points
•
HBCD biodegradation by Shewanella oneidensis
•
Optimization of HBCD biodegradation by the Box-Behnken analysis
•
Identification of useful metabolites from HBCD degradation
Publisher
Springer Berlin Heidelberg,Springer,Springer Nature B.V
