Biodegradation and toxicity of byproducts from the treatment of landfill leachate with hydrotalcite

Almeida, Nair Conde de; Faria, Adriano Uemura de; Oliveira, Valdenilson José Alves de; Govone, José Sílvio; Angelis, Dejanira de Franceschi de

doi:10.5004/dwt.2018.22652

Cited by 2 publications

(1 citation statement)

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“…Other studies using A. franciscana as a bioindicator showed a 21% decrease in the harmful potential of landfill leachate during treatment processes, which was a similar value to our results [ 52 ]. A significant reduction in toxicity for 60% of the landfill leachate as a result of biological treatment over a 35-day period was also observed in the D. magna tests [ 53 ].…”

Section: Resultssupporting

confidence: 92%

Ecotoxicological Estimation of 4-Cumylphenol, 4-t-Octylphenol, Nonylphenol, and Volatile Leachate Phenol Degradation by the Microscopic Fungus Umbelopsis isabellina Using a Battery of Biotests

Janicki

Długoński

Felczak

et al. 2022

IJERPH

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The phenolic xenobiotics nonylphenol (NP), 4-tert-octylphenol (4-t-OP), and 4-cumylphenol (4-CP) have the potential to seriously disrupt the endocrine system. Volatile phenols (VPs), especially those present in landfill leachate, also adversely affect the health of numerous organisms. Microbial degradation of xenobiotics can result in the formation of intermediates with higher toxicity than the precursor substrates. Therefore, the main aim of this study was to assess the changes in environmental ecotoxicity during the biotransformation of nonylphenol, 4-tert-octylphenol, 4-cumylphenol and volatile phenols by Umbelopsis isabellina using a battery of biotests. The application of bioindicators belonging to different taxonomic groups and diverse trophic levels (producers, consumers, and reducers) indicated a significant reduction in toxicity during the cultivation of fungus cultures both for nonylphenol, 4-tert-octylphenol, 4-cumylphenol and volatile phenols. The rate of toxicity decline was correlated with the degree of xenobiotic biotransformation. Removal of 4-cumylphenol and 4-tert-octylphenol also led to a decrease in the anti-androgenic potential. Moreover, this is the first report demonstrating the anti-androgenic properties of 4-cumylphenol. The results showed that U. isabellina is an attractive tool for the bioremediation and detoxification of contaminated environments.

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Section: Resultssupporting

confidence: 92%