Chemosphere. 2015 Jan;118:315-21. doi: 10.1016/j.chemosphere.2014.09.048.
Due to widespread accumulation of polybrominated diphenyl ethers (PBDEs) in our surroundings, it is important to clarify their fate in the environment and the options of their elimination. The aim of this study was to monitor the biodegradation of the most frequent congeners (BDE 28, 47, 49, 66, 85, 99, 100, 153, 154, 183 and 209) under aerobic condition by indigenous microflora in 2 industrially contaminated sewage sludge samples. BDE 209 was detected as the predominating congener in concentrations 685 ng/g and 1403 ng/g dry weight in sewage sludge from WWTPs (waste water treatment plants) Hradec Kralove and Brno, respectively. The total amount of 10 lower PBDEs was 605 and 205 ng/g dry weight, respectively. The aerobic degradation was significantly enhanced by the addition of yeast extract and 4-bromobiphenyl. The total concentrations of all 11 PBDE congeners were lowered and their elimination was detected reaching 62–78% of their initial amounts after 11 months of cultivation. The degradation of most abundant congener BDE 209 followed the first-order kinetics with constant detected between 2.77 × 10(−3) d(−1) and 3.79 × 10−(3)d(−1) and the half-lives of BDE 209 degradation ranged between 6.0 and 8.2 months. This work clearly demonstrates that both lower brominated PBDEs as well as the major representative BDE 209 could be successfully removed from municipally contaminated sludge under aerobic conditions.
由于多溴二苯醚（PBDEs）在我们周围环境中的广泛积累，因此阐明其在环境中的命运和消除方法非常重要。本研究的目的是监测最常见同系物（BDE 28、47、49、66、85、99、100、153、154、183 和 209）在好氧条件下由土著微生物群落对 2 种工业污染污水污泥样品中的生物降解情况。BDE 209 是在分别来自 Hradec Kralove 和 Brno 的 WWTP（污水处理厂）的污水污泥中检测到的浓度为 685 ng/g 和 1403 ng/g 干重的主要同系物。10 种低溴 PBDE 的总量分别为 605 和 205 ng/g 干重。添加酵母提取物和 4-溴联苯可显著增强好氧降解。经过 11 个月的培养，所有 11 种 PBDE 同系物的总浓度均降低，检测到其消除率达到初始值的 62%至 78%。最丰富的同系物 BDE 209 的降解遵循一级动力学，检测到的常数在 2.77×10(−3)d(−1)和 3.79×10(−3)d(−1)之间，BDE 209 降解的半衰期范围在 6.0 到 8.2 个月之间。这项工作清楚地表明，在好氧条件下，可从城市污染污泥中成功去除低溴化 PBDE 以及主要代表物 BDE 209。
