Efficient hexabromocyclododecane-biodegrading microorganisms isolated in Taiwan
Journal
Chemosphere
Journal Volume
271
Date Issued
2021
Author(s)
Abstract
The potential toxicity of hexabromocyclododecane (HBCD), its persistence in the environment, and its high bioaccumulation characteristics pose a need to remediate HBCD in the environment. Bacillus cereus and B. subtilis species complexes we isolated from Taiwan soil are capable of degrading HBCD. B. cereus can degrade HBCD with a half-life only 0.911 days. The highest efficiency of HBCD degradation by B. cereus was achieved at pH 7.0, 35 °C, and 0.10 ppm HBCD. The removal mechanism of HBCD by B. cereus is debromination and its pathway was proposed. The addition of surfactant Tween 60 improved HBCD removal but the addition of CaO2, slow-releasing oxygen, did not. These findings can facilitate the bioremediation of HBCD in the environment. ? 2021 Elsevier Ltd
Subjects
Bacteriology; Biochemistry; Bioremediation; Debromination; Half lives; Hexabromocyclododecanes; Removal mechanism; Subtilis; Bacillus cereus; bacterial DNA; DNA 16S; hexabromocyclododecane; oxygen; polysorbate 60; brominated hydrocarbon; flame retardant; hexabromocyclododecane; bioaccumulation; biodegradation; bioremediation; chemical compound; microorganism; surfactant; toxicity; Achromobacter; Article; Bacillus cereus; Bacillus subtilis; bacterial growth; bacterium isolate; bioaccumulation; biodegradation; bioremediation; debromination; nonhuman; persistent organic pollutant; pH; phylogeny; Pseudomonas aeruginosa; Rhodopseudomonas palustris; soil; Taiwan; temperature; Taiwan; Bacillus cereus; Bacillus subtilis; Biodegradation, Environmental; Flame Retardants; Hydrocarbons, Brominated; Soil; Taiwan
SDGs
Type
journal article