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首页> 外文期刊>Environmental Science & Technology >Fate of a ~(14)C-Labeled Nonylphenol Isomer in a Laboratory-Scale Membrane Bioreactor
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Fate of a ~(14)C-Labeled Nonylphenol Isomer in a Laboratory-Scale Membrane Bioreactor

机译：〜（14）C标签的壬基酚异构体在实验室规模的膜生物反应器中的命运

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摘要

This study aimed at giving a better insight into the possible fate of nonylphenol (NP)during wastewater treatment by using a lab-scale membrane bioreactor (MBR)designed and optimized for fate studies carried out with radiolabeled compounds.After a single pulse of ~(14)C-labeled-NP isomer (4-[1-ethyl-1,3-dimethylpentyl]phenol)as radiotracer,the applied radioactivity was monitored in the MBR system over 34 days.The mass balance of NP residues at the end of the study showed that 42% of the applied radioactivity was recovered in the effluent as degradation products of NP,21% was removed with the daily excess sludge from the MBR,and 34% was recovered as adsorbed in the component parts of the MBR.A high amount of NP was associated to the sludge during the test period,while degradation compounds were mainly found in the effluent.Partial identification of these metabolites by means of HPLC-tandem mass spectrometry coupled to radio-detection showed they are alkyl-chain oxidation products of NP.The use of this MBR and a radiolabeled test compound was found suitable for demonstrating that under the applied conditions,the elimination of NP through mineralization and volatilization processes (both less than 1%)was negligible.However,the removal of NP via sorption and the continuous release of oxidation products of NP in permeate were of relevance.
机译：这项研究旨在通过使用实验室规模的膜生物反应器（MBR）来更好地了解废水处理过程中壬基酚（NP）的最终命运，该反应器是为放射性标记化合物进行的命运研究而设计和优化的。 14）C标记的NP异构体（4- [1-乙基-1,3-二甲基戊基]苯酚）作为放射性示踪剂，在MBR系统中监测应用的放射性超过34天。研究表明，由于NP的降解产物，废水中回收了42％的放射性，每天MBR去除了21％的污泥，MBR的组成部分吸附了34％的放射性。在测试期间，污泥中含有大量的NP，而降解产物主要存在于废水中。通过HPLC-串联质谱联用放射检测对这些代谢产物进行部分鉴定，表明它们是烷基链氧化产物。 NP。发现该MBR和放射性标记的测试化合物的使用适合于证明在所应用的条件下，通过矿化和挥发过程（均小于1％）消除NP可以忽略不计。渗透物中NP氧化产物的连续释放是相关的。

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  • 来源
    《Environmental Science & Technology》 |2006年第19期|p.6131-6136|共6页
  • 作者

    MAGDALENA CIRJA; SEBASTIAN ZUHLKE; PAVEL IVASHECHKIN;

  • 作者单位

    Institute of Environmental Research -Environmental Biology and Chemodynamics (BioV),RWTH Aachen University,Worringerweg 1,52074 Aachen,Germany,Institute of Environmental Research (INFU),University of Dortmund,Otto-Hahn-Strasse 6,44221 Dortmund,Germa;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
  • 关键词

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