Toxicity evaluation of leached of sugarcane vinasse: Histopathology and immunostaining of cellular stress protein

Ecotoxicology and Environmental Safety
Maria Paula Mancini CoelhoCarmem Silvia Fontanetti

Abstract

Sugarcane vinasse is a residue generated at a rate fifteen times greater than the ethanol production. Because of its high organic and micronutrient content, this residue is used as a fertilizer on sugarcane crops. However, when used in large quantities, vinasse can saturate the soil and contaminate nearby water resources by percolation and leaching. Given the proven toxic potential of in natura vinasse, the present study aimed to evaluate the toxic potential of leached sugarcane vinasse using Nile tilapia (Oreochromis niloticus) as a test organism. A bioassay was performed after vinasse percolation in laboratory soil columns. The bioassay included one control group containing fresh water and two treatment groups, the first exposed to a 2,5% dilution of leached of vinasse and the second to a 2,5% dilution of in natura vinasse. After exposure, histopathological analysis was performed in gills and livers, and the latter were labelled for HSP70 proteins. No significant changes were detected in the gills of the exposed fish. However, in the liver, both in natura and leached vinasse induced statistically significant histopathological changes. These changes include hydropic degeneration, cell boundary losses, pyknotic nuclei and cellu...Continue Reading

Citations

May 21, 2020·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Thays de Andrade GuedesCarmem Silvia Fontanetti
Apr 16, 2021·Ecotoxicology·João Paulo CandidoDejanira de Franceschi de Angelis
Apr 17, 2021·Journal of Environmental Management·Sheel RatnaRajesh Kumar

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