Ecotoxicological screening of Kenyan tannery dust using a luminescent-based bacterial biosensor

International Journal of Environmental Health Research
Mwinyikione MwinyihijaKen Killham

Abstract

Ecotoxicological screening of dust sampled throughout a Kenyan tannery was conducted using a luminescence (lux)-based bacterial biosensor for both solid and liquid assays. This was complemented by chemical analysis in an attempt to identify possible causative toxic components. The biosensor results showed a highly significant (p < 0.001) difference in both solid and liquid phase toxicity in samples collected from various identified sampling points in the tannery. A positive correlation was observed between results of the solid and liquid phase techniques, for most of the sampling points indicating that the toxic contaminants were bioavailable both in the solid and liquid state. However, the results generally indicated toxicity associated with liquid phase except certain areas in solid phase such as chemical handling, buffing area and weighing. The most toxic tannery area identified was the weighing area (p < 0.001), showing the lowest bioluminescence for both the solid (0.38 +/- 2.21) and liquid phases (0.01 +/- 0.001). Chromium was the metal present in the highest concentration indicating levels higher than the stipulated regulatory requirement of 0.5 mg Cr/m3 for total Cr (highest Cr concentration was at chemical handling at ...Continue Reading

References

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Citations

Oct 12, 2016·Biosensors & Bioelectronics·Paria PashazadehMiguel de la Guardia
Jan 27, 2017·International Journal of Environmental Research and Public Health·Aurélie PelfrêneFrancis Douay

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