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Acute toxicity of piggery effluent and veterinary pharmaceutical cocktail on freshwater organisms

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Abstract

Intensive livestock farming has increased the use of veterinary pharmaceuticals in many developing countries, and this is considered a significant concern to the freshwater ecosystem. However, the information on the potential acute toxicity of piggery effluent waste and the veterinary pharmaceutical effluent discharged into the aquatic environment is limited. This study assessed the adverse effect of a piggery effluent and the cocktail mixtures of high- and low-level doses of three frequently occurring veterinary pharmaceuticals (tetracycline (TETR), ivermectin (IVER), and salicylic acid (SALA)) on freshwater organisms using three representative freshwater biotests organisms: Pseudokirchneriella subcapitata (P. subcapitata), Daphnia magna (D. magna), and Tetrahymena thermophila (T. thermophila). The freshwater organism test results showed that the 24-h and 48-h EC50 algal toxicity to P. subcapitata exposed to 10% unfiltered piggery effluent were 25.6 and 49.3% respectively while the 24-h LC50 value to Cladocera, D. magna exposed to unfiltered piggery effluent was 23.2 (17.7–30.4)%. The 24-h EC50 protozoan toxicity to T. thermophila exposed to 1% HLD veterinary pharmaceuticals was 0.014 μg/L. Thus, the study established the different sensitivities of freshwater organisms to various percentage levels of piggery effluent and high- and low-level doses of veterinary pharmaceutical. The piggery effluent and the pharmaceutical cocktail mixtures have potential toxicological effects on the freshwater ecosystem.

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All the data generated or analysed during this study are included in this published article.

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Funding

This study was supported by the Water Research Commission, South Africa (WRC K4/2500); Environmental Chemistry and Toxicology research group, Cape Peninsula University of Technology, and the Cape Peninsula University of Technology Postgraduate Research Scholarship.

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Material preparation, data collection and analysis, investigation, and writing the manuscript-original draft (Angela C. Udebuani).

Material preparation, investigation, data collection and analysis, software and writing the manuscript-review and editing (Omoniyi Pereao).

Analysis and contributed to writing the manuscript (Michael O. Akharame).

Supervision, study conception and design, funding acquisition (Olalekan S. Fatoki).

Supervision, study conception and design, software, funding acquisition (Beatrice O. Opeolu).

All authors read and approved the final manuscript.

Corresponding author

Correspondence to Omoniyi Pereao.

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Udebuani, A.C., Pereao, O., Akharame, M.O. et al. Acute toxicity of piggery effluent and veterinary pharmaceutical cocktail on freshwater organisms. Environ Monit Assess 193, 293 (2021). https://doi.org/10.1007/s10661-021-09085-z

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  • DOI: https://doi.org/10.1007/s10661-021-09085-z

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