Chemical and microbiological characterization of an aged PCB-contaminated soil

0455610 - MBÚ 2016 RIV NL eng J - Journal Article
Stella, Tatiana - Covino, Stefano - Filipová, Alena - Křesinová, Zdena - Voříšková, Jana - Větrovský, Tomáš - Baldrian, Petr - Cajthaml, Tomáš
Chemical and microbiological characterization of an aged PCB-contaminated soil.
Science of the Total Environment. Roč. 533, NOV 2015 (2015), s. 177-186. ISSN 0048-9697. E-ISSN 1879-1026
R&D Projects: GA TA ČR TE01020218; GA ČR GA13-28283S; GA MŠMT(CZ) EE2.3.30.0003
Institutional support: RVO:61388971
Keywords : Polychlorinated biphenyls * Chlorobenzoic acids * Bioaccessibility
Subject RIV: EE - Microbiology, Virology
Impact factor: 3.976, year: 2015

This study was aimed at complex characterization of three soil samples (bulk soil, topsoil and rhizosphere soil) from a site historically contaminated with polychlorinated biphenyls (PCB). The bulk soil was the most highly contaminated, with a PCB concentration of 705.95 mg kg(-1), while the rhizosphere soil was the least contaminated (169.36 mg kg(-1)). PCB degradation intermediates, namely chlorobenzoic acids (CBAs), were detected in all the soil samples, suggesting the occurrence of microbial transformation processes over time. The higher content of organic carbon in the topsoil and rhizosphere soil than in the bulk soil could be linked to the reduced bioaccessibility (bioavailability) of these chlorinated pollutants. However, different proportions of the PCB congener contents and different bioaccessibility of the PCB homologues indicate microbial biotransformation of the compounds.
Permanent Link: http://hdl.handle.net/11104/0256221