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首页> 外文会议>International Conference on Remediation of Chlorinated and Recalcitrant Compounds >Degradation of Persistent PCBs in Soil during Incubations with a Thermophilic Bacterium
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Degradation of Persistent PCBs in Soil during Incubations with a Thermophilic Bacterium

机译：嗜热细菌孵育期间土壤中持久性PCB的降解

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Background/Objectives. Polychlorinated biphenyls (PCBs) were widely manufactured industrial chemicals valued for their insulating properties and resistance to degradation. The latter characteristic has proved problematic however, because PCBs were found to have a variety of negative environmental and human health impacts and contamination by various Arochlors remains an issue in many soils and sediments. We describe the results of experiments designed to assess the efficacy of a new bacterial approach to the degradation of PCBs in the environment. The protocol is unique in that it uses a thermophilic Geobacillus strain of bacteria in a single-step aerobic process. This method is, to the best of our knowledge, novel and differs markedly from existing bioremediation methods for PCBs that require sequential anaerobic and aerobic conditions and has generally proven difficult to implement. The objectives included the determination of degradation rates for total Arochlors in a pilot study on soil from an abandoned industrial site in the northeastern U.S. that has been contaminated for several decades with PCBs including Arochlor 1254. Objectives also included monitoring the changes in PCB homologs over time and further mass balance and scalability assessments or eventual field applications.
机译：背景/目标。多氯联苯（PCB）被广泛制造的工业化学品，用于其绝缘性能和降解抗性。后一种特征已经证明有问题，因为发现PCB具有各种负面的环境和人类健康影响，各种茄子的污染仍然是许多土壤和沉积物中的问题。我们描述了旨在评估新细菌方法对环境中PCB降解的疗效的实验结果。该方案是独一无二的，因为它在单步好氧过程中使用嗜热性Geobacillus菌株。这种方法是，据我们所知，新颖的，并与PCB的现有生物修复方法显着不同，这些方法需要连续厌氧和有氧条件，并且通常被证明难以实施。目的包括在美国东北部放弃工业部位的污染物中的土壤中污染了几十年的污染了几十年来确定了鳄鱼，其中包括arochlor 1254的污染。目的还包括监测PCB同源物的变化随着时间的推移以及更多的质量平衡和可扩展性评估或最终的现场应用程序。

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