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Title: Hydroquinone Ecotoxicity: Unveiling Risks in Soil and River Ecosystems with Insights into Microbial Resilience
Authors: Valenzuela, Antonio
Ballestero Fernández, Diego
Lorca, Guillermo
Langa Morales, Elisa SCOPUSID
Keywords: Hydroquinone; Acute toxicity; Daphnia magna; Aliivibrio fischeri; Allium cepa; Eisenia fetida; Microbial communities
Issue Date: 29-Jan-2024
Publisher: MDPI
Citation: Valenzuela, A.; Ballestero, D.; Gan, C.; Lorca, G.; Langa, E.; Pino-Otín, M.R. Hydroquinone Ecotoxicity: Unveiling Risks in Soil and River Ecosystems with Insights into Microbial Resilience. Toxics 2024, 12, 115. 10.3390/toxics12020115
Abstract: Despite widespread industrial use, the environmental safety of hydroquinone (HQ), a benzene compound from plants used in processes like cosmetics, remains uncertain. This study evaluated the ecotoxicological impact of HQ on soil and river environments, utilizing non-target indicator organisms from diverse trophic levels: Daphnia magna, Aliivibrio fischeri, Allium cepa, and Eisenia fetida. For a more environmentally realistic assessment, microbial communities from a river and untreated soil underwent 16S rRNA gene sequencing, with growth and changes in community-level physiological profiling assessed using Biolog EcoPlate™ assays. The water indicator D. magna exhibited the highest sensitivity to HQ (EC50 = 0.142 μg/mL), followed by A. fischeri (EC50 = 1.446 μg/mL), and A. cepa (LC50 = 7.631 μg/mL), while E. fetida showed the highest resistance (EC50 = 234 mg/Kg). Remarkably, microbial communities mitigated HQ impact in both aquatic and terrestrial environments. River microorganisms displayed minimal inhibition, except for a significant reduction in polymer metabolism at the highest concentration (100 μg/mL). Soil communities demonstrated resilience up to 100 μg/mL, beyond which there was a significant decrease in population growth and the capacity to metabolize carbohydrates and polymers. Despite microbial mitigation, HQ remains highly toxic to various trophic levels, emphasizing the necessity for environmental regulations.
ISSN: 2305-6304
Appears in Collections:Artículos de revistas

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