Natural bacterial team scrubs toxic pollutants from contaminated soil in days
Zhao Y, Zheng M, An J, Xiu W, Yao J
Soil Health
If your garden sits near an old road, rail line, or industrial lot, the soil may hold tar-like pollutants that plants take up, and microbial teams like this one could someday help clean that ground before you plant.
Scientists collected soil bacteria from a coal mine site and grew them on a diet of a toxic pollutant found in soot and tar. The mixed group of microbes ate up most of that pollutant in soil within nine days, and it also handled other related pollutants. It kept working with arsenic around and survived cold storage, which makes it a practical candidate for cleaning up polluted ground.
Key Findings
PD1 removed 70% of phenanthrene in liquid culture within 3 days, and 74.7% (3 days) and 89.5% (9 days) in contaminated soil, outperforming native soil microbes.
The consortium, dominated by Acidovorax and Pigmentiphaga, also degraded fluoranthene, pyrene, and benzo[a]anthracene, and tolerated arsenic(III) up to 50 mg/L.
Metagenomic and metatranscriptomic data plus two identified early intermediates supported a proposed main degradation pathway, with cooperation among community members driving efficiency; activity stayed stable after long-term storage at 4°C.
chevron_right Technical Summary
Researchers found a team of soil bacteria from a coal mine backfill site that breaks down toxic oil-derived pollutants in soil. In tests, it cleared nearly 90% of one common pollutant in 9 days and kept working with arsenic present.
Abstract Preview
Original paper
Characterization and soil remediation performance of a natural polycyclic aromatic hydrocarbon-degrading bacterial consortium (PD1).
Polycyclic aromatic hydrocarbons (PAHs) are persistent and toxic soil contaminants that pose significant risks to environmental and human health. In this study, a natural PAHs-degrading microbial c...
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