在台湾分离出的高效六溴环十二烷生物降解微生物。
Efficient hexabromocyclododecane-biodegrading microorganisms isolated in Taiwan.
机构信息
Department of Agricultural Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 106, Taiwan.
Department of Agricultural Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 106, Taiwan.
出版信息
Chemosphere. 2021 May;271:129544. doi: 10.1016/j.chemosphere.2021.129544. Epub 2021 Jan 5.
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 CaO, slow-releasing oxygen, did not. These findings can facilitate the bioremediation of HBCD in the environment.
六溴环十二烷（HBCD）具有潜在的毒性、在环境中的持久性以及高度的生物累积特性，因此需要对其进行环境修复。我们从台湾土壤中分离出的蜡状芽孢杆菌和枯草芽孢杆菌种复合物能够降解 HBCD。蜡状芽孢杆菌可以在半衰期仅为 0.911 天的情况下降解 HBCD。蜡状芽孢杆菌降解 HBCD 的最高效率是在 pH 值为 7.0、35°C 和 0.10ppm HBCD 的条件下实现的。蜡状芽孢杆菌去除 HBCD 的机制是脱溴，其途径被提出。表面活性剂吐温 60 的添加提高了 HBCD 的去除率，但添加 CaO 和缓慢释放的氧气则没有。这些发现可以促进环境中 HBCD 的生物修复。
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