Effects of Apirolio Addition and Alfalfa and Compost Treatments on the Natural Microbial Community of a Historically PCB-Contaminated Soil

Vito Armando Laudicina, Paola Grenni, Valeria Ancona, Martina Di Lenola, Jasmin Rauseo, Vito Felice Uricchio, Anna Barra Caracciolo, Angelo Massacci

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Abstract

Polychlorinated biphenyls (PCBs) are ubiquitous and persistent organic pollutants generated exclusively from human sources and found in the environment as several congeners (e.g. Apirolio, produced in Italy and used for electrical transformers). To evaluate the ability of the natural microbial community of historically PCB-contaminated soil to transform or degrade PCBs after fresh contamination through the addition of Apirolio, a microcosm experiment was conducted in a greenhouse for approximately 8 months. Compost and Medicago sativa (alfalfa) were additionally used in the microcosms to stimulate microbial PCB degradation. Chemical analyses were performed to evaluate PCB concentrations in the soil and plant tissue. Changes in the microbial community under the different experimental conditions were evaluated in terms of total abundance, viability, diversity, and activity. Interestingly, the addition of Apirolio did not negatively affect the microbial community but did stimulate the degradation of the freshly added PCBs. The plant and compost co-presence did not substantially increase PCB degradation, but it increased the microbial abundance and activity and the occurrence of α-Proteobacteria and fungi.
Lingua originaleEnglish
Numero di pagine14
RivistaWATER AIR AND SOIL POLLUTION
Volume229
Stato di pubblicazionePublished - 2018

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All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Ecological Modelling
  • Water Science and Technology
  • Pollution

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Laudicina, V. A., Grenni, P., Ancona, V., Di Lenola, M., Rauseo, J., Uricchio, V. F., Barra Caracciolo, A., & Massacci, A. (2018). Effects of Apirolio Addition and Alfalfa and Compost Treatments on the Natural Microbial Community of a Historically PCB-Contaminated Soil. WATER AIR AND SOIL POLLUTION, 229.