Exploring the biosynthetic possibilities of hydroxylated polybrominated diphenyl ethers from bromophenols in Prorocentrum donghaiense: Implications for bioremediation

多溴联苯醚 生物修复 化学 环境化学 生物 有机化学 污染物 污染 生态学
作者
Bin Li,Jianghong Shi,Xueling Xiang,Mengtao Zhang,Hui Ge,Shuhan Sun
出处
期刊:Chemosphere [Elsevier BV]
卷期号:362: 142611-142611
标识
DOI:10.1016/j.chemosphere.2024.142611
摘要

Bromophenols has been proven to synthesize hydroxylated polybrominated diphenyl ethers (OH-PBDEs), which may pose additional environmental and health risks in the process of bioremediation. In this study, the removal of 2,4-dibromophenol (2,4-DBP) and 2,4,6-tribromophenol (2,4,6-TBP) and the biosynthetic of OH-PBDEs by Prorocentrum donghaiense were explored. The removal efficiencies of 2,4-DBP and 2,4,6-TBP ranged from 32.71% to 76.89% and 31.15%–78.12%, respectively. Low concentrations of 2,4-DBP stimulated algal growth, while high concentrations were inhibitory. Furthermore, exposure to 10.00 mg L−1 2,4-DBP resulted in the detection of 2′-hydroxy-2,3′,4,5′-tetrabromodiphenyl ether (2′–OH–BDE-68) within P. donghaiense. In contrast, increasing concentrations of 2,4,6-TBP considerably inhibited P. donghaiense growth, with 4′-hydroxy-2,3′,4,5′,6-pentabromodiphenyl ether (4′–OH–BDE-121) detected within P. donghaiense under 5.00 mg L−1 2,4,6-TBP. Metabolomic analysis further revealed that the synthesized OH-PBDEs exhibited higher toxicity than their precursors and identified the oxidative coupling as a key biosynthetic mechanism. These findings confirm the capacity of P. donghaiense to remove bromophenols and biosynthesize OH-PBDEs from bromophenols, offering valuable insights into formulating algal bioremediation to mitigate bromophenol contamination.
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