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Coupling of Bioaugmentation and Phytoremediation to Improve PCBs Removal From a Transformer Oil-Contaminated Soil

Coupling of Bioaugmentation and Phytoremediation to Improve PCBs Removal From a Transformer Oil-Contaminated Soil

Maryam Salimizadeh, Mehran Shirvani, Hossein Shariatmadari, Mahnaz Nikaeen, Seyedeh Leili Mohebi Nozar

Int J Phytoremediation. 2018 Jun 7;20(7):658-665.

PMID: 29723054

Abstract:

This study was carried out to assess the dissipation of 17 selected polychlorinated biphenyl (PCBi) congeners in a transformer oil-contaminated soil using bioaugmentation with 2 PCB-degrading bacterial strains, i.e., Pseudomonas spp. S5 and Alcaligenes faecalis, assisted or not by the maize (Zea mays L.) plantation. After 5 and 10 weeks of treatment, the remaining concentrations of the target PCBi congeners in the soil were extracted and measured using GC-MS. Results showed that the bacterial augmentation treatments with Pseudomonas spp. S5 and A. faecalis led to 21.4% and 20.4% reduction in the total concentration of the target PCBs (ΣPCBi), respectively, compared to non-bioaugmented unplanted control soil. The ΣPCBi decreased by 35.8% in the non-bioaugmented planted soil compared with the control. The greatest degradation of the PCB congeners was observed over a 10-week period in the soil inoculated with Pseudomonas spp. S5 and cultivated with maize. Under this treatment, the ΣPCBi decreased from 357 to 119 ng g-1 (66.7% lower) and from 1091 to 520 ng g-1 (52.3% lower). Overall, the results suggested that the combined application of phytoremediation and bioaugmentation was an effective technique to remove PCBs and remediate transformer oil-contaminated soils.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AS2121344	PCBs in Transformer Oil			Price

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