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首页> 外文期刊>Journal of soil & sediments >Biofilm formation vs. PCB adsorption on granular activated carbon in PCB-contaminated aquatic sediment
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Biofilm formation vs. PCB adsorption on granular activated carbon in PCB-contaminated aquatic sediment

机译：生物膜形成与多氯联苯在多氯联苯污染的水生沉积物中的颗粒状活性炭上的吸附

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摘要

Purpose Granular activated carbon (GAC) that is both an efficient polychlorinated biphenyl (PCB) adsorbent and a good growth support for microorganisms is considered suitable for in situ remediation of PCB-contaminated aquatic sediment. Here, the potential competition between biofilm formation and PCB (Aroclor 1260) adsorption on GAC in a PCB-contaminated aquatic sediment was investigated. Materials and methods GACs, both coated and uncoated with biofilm or PCBs, were incubated with sediment. Each was monitored for biofilm development and PCB adsorption by: (a) cryo-scanning electron microscopy, (b) real-time quantitative PCR analysis of the 16S rRNA, (c) terminal restriction fragment length polymorphism and (d) chemical analysis. Results and discussion Biofilm formation on the GAC by the sediment's bacteria was rapid and occurred in three stages: (1) initial adherence of discrete bacteria, (2) an increase in bio-mass associated with a shift in bacterial diversity and (3) exopolymeric matrix production. The density and biodiversity of the multispecies biofilm depended on the biofilm's age. The addition of Aroclor 1260 to the sediment resulted in a decrease of the biofilm biomass, whereas Aroclor 1260 previously adsorbed on the GAC prior to contact with the sediment did not influence the biofilm biomass or its formation dynamics. Similarly, a biofilm previously developed on the GAC did not significantly decrease PCB adsorption, although contact of the GAC with the sediment did hamper adsorption of the higher chlorinated PCB congeners. Conclusions A mature multispecies bacterial biofilm developed in 1 month on GAC in contact with aquatic sediment did not hamper PCB adsorption, and PCB adsorption did not influence biofilm formation. These findings are important for the application of remediation strategies.
机译：目的粒状活性炭（GAC）既是有效的多氯联苯（PCB）吸附剂，又是微生物的良好生长支持物，被认为适合就地修复受PCB污染的水生沉积物。在这里，研究了生物膜的形成和PCB（Aroclor 1260）在受PCB污染的水生沉积物中GAC吸附之间的潜在竞争。材料和方法将涂有或未涂有生物膜或PCB的GAC与沉积物一起孵育。通过（a）低温扫描电子显微镜，（b）16S rRNA的实时定量PCR分析，（c）末端限制性片段长度多态性和（d）化学分析来监测每个生物膜的发育和PCB吸附。结果与讨论沉积物细菌在GAC上形成生物膜的过程非常迅速，并分三个阶段进行：（1）离散细菌的初始粘附；（2）与细菌多样性变化有关的生物量增加；（3）外聚基质生产。多物种生物膜的密度和生物多样性取决于生物膜的年龄。在沉积物中添加Aroclor 1260会导致生物膜生物量减少，而先前与沉积物接触之前吸附在GAC上的Aroclor 1260不会影响生物膜生物量或其形成动力学。同样，尽管GAC与沉积物的接触确实妨碍了较高氯化PCB同类物的吸附，但先前在GAC上形成的生物膜并没有显着降低PCB的吸附。结论GAC在1个月内与水沉积物接触后形成的成熟的多物种细菌生物膜不会妨碍PCB的吸附，PCB的吸附也不会影响生物膜的形成。这些发现对于补救策略的应用很重要。

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  • 来源
    《Journal of soil & sediments》 |2013年第4期|793-800|共8页
  • 作者

    Anne Mercier; Guillaume Wille; Caroline Michel; Jennifer Harris-Hellal; Laurence Amalric; Catherine Morlay; Fabienne Battaglia-Brunet;

  • 作者单位

    Environmental Biogeochemistry Unit, Environment and Process Division, BRGM, 3, avenue Claude Guillemin, 45060 Orleans Cedex 2, France;

    Monitoring, Metrology and Analysis Division, BRGM, 3, avenue Claude Guillemin, 45060 Orleans Cedex 2, France;

    Environmental Biogeochemistry Unit, Environment and Process Division, BRGM, 3, avenue Claude Guillemin, 45060 Orleans Cedex 2, France;

    Environmental Biogeochemistry Unit, Environment and Process Division, BRGM, 3, avenue Claude Guillemin, 45060 Orleans Cedex 2, France;

    Monitoring, Metrology and Analysis Division, BRGM, 3, avenue Claude Guillemin, 45060 Orleans Cedex 2, France;

    Universite Lyon 1, INSA-Lyon, MATEIS CNRS UMR 5510, 7 avenue Jean Capelle, 69621 Villeurbanne, France;

    Environmental Biogeochemistry Unit, Environment and Process Division, BRGM, 3, avenue Claude Guillemin, 45060 Orleans Cedex 2, France;

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  • 正文语种 eng
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  • 关键词

    bacterial biofilm; CE-T-RFLP; Cryo-SEM; granular activated carbon (GAC); polychlorinated biphenyl (PCB);

    机译：细菌生物膜;CE-T-RFLP;低温SEM颗粒活性炭（GAC）;多氯联苯（PCB）;

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