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The study aims to evaluate the pollution of heavy metals and the diversity of microorganisms in soil contaminated by waste engine oil.

January 26, 2026

Ecological risk assessment of heavy metals and microbiological diversity of soil samples from some automobile workshops in Benin City, Nigeria

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Assesses heavy metal pollution and microbial diversity in soils from auto workshops, implying environmental concerns.

The study aims to evaluate the pollution of heavy metals and the diversity of microorganisms in soil contaminated by waste engine oil.
Collected soil samples from various automobile workshops in Benin City.
Analyzed physicochemical parameters including pH, electrical conductivity, and metal concentrations.
Isolated and identified bacterial and fungal species from the soil samples.
Iron had the highest contamination factor of 8.88, while chromium had the least at 0.87.
Bacterial counts varied, with the highest at 8.61x10^4 cfu/g and the least at 1.12x10^4 cfu/g.
The soils were classified as unpolluted to moderately polluted based on contamination indices.

Enerijiofi et al. (2026) studied this question.

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