Toxicological Profile of 1,4-Benzoquinone and Its Degradation By-Products during Electro-Fenton, Electrocoagulation, and Electrosynthesized Fe(VI) Oxidation

Türkay, Özge; Barışçı, Sibel; Öztürk, Hazal; Öztürk, Bahar; Şeker, Mine Gül

doi:10.1061/(asce)ee.1943-7870.0001467

Cited by 5 publications

(4 citation statements)

References 32 publications

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“…[1][2][3] Electrochemical advanced oxidation processes (EAOPs) have proved to be highly efficient in the removal of those persistent pollutants. [4][5][6][7][8] EAOPs are characterized by the in-situ generation of hydroxyl radicals ( * OH, E 0 = 2.8 V/SHE) which promote the mineralization of the organic pollutants. [9,10] Among those processes, the electrochemical oxidation (EO) has been the most employed method for treating organic pollutants applying different electrocatalytic materials.…”

Section: Introductionmentioning

confidence: 99%

“…Benzoquinone (BQ) is a xenobiotic, a toxic intermediate of a wide variety of benzene derivatives in the course of their oxidative degradation that cannot be treated by biodegradation due to their resistance to microorganisms . Electrochemical advanced oxidation processes (EAOPs) have proved to be highly efficient in the removal of those persistent pollutants . EAOPs are characterized by the in‐situ generation of hydroxyl radicals ( .…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Technologies for Detecting and Degrading Benzoquinone Using Diamond Films

et al. 2019

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In this work, the detection and quantification of p‐benzoquinone (BQ) was performed by differential pulse voltammetry (DPV) with a diamond film sensor. The calibration curve and the limits of detection and quantification for BQ were estimated. DPV was compared to high‐performance liquid chromatography (HPLC) analysis, leading to a satisfactory result in terms of stability and sensitive response. As a novel aim, a combined electrochemical method for environmental application has been developed to oxidize and detect BQ using diamond films. A set of galvanostatic electrochemical oxidation experiments with 130 mL of BQ solution were accomplished in order to understand the effect of current density, the concentration of the pollutant and the initial pH using different electrolytes with similar conductivity. The optimal operating conditions were achieved at 33.3 mA cm−2, 100 mg L−1 of BQ at pH 5.0 with 50 mM Na2SO4. Additionally, the evolution of short‐chain carboxylic acids of that test was followed over time in order to suggest a possible degradation route. The results were described and discussed in the light of the existing literature.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrochemical Technologies for Detecting and Degrading Benzoquinone Using Diamond Films

et al. 2019

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“…The toxicity of HQ to the bacteria A. fischeri is illustrated in Figure 1 b and the obtained EC 50 was 1.446 (1.155–1.796) µg/mL. Limited data exist on the toxicity of HQ to A. fischeri , as studies typically focus on the toxicity of byproducts, including HQ, generated during the decomposition of various products such as paracetamol [ 61 ], benzidine [ 62 ], benzoquinone [ 63 ], sulfamethoxazole [ 64 ], sulfanilamide [ 65 ] or clofibric acid [ 66 ] among others. It is noteworthy that almost all studies agree that HQ is one of the most toxic byproducts, even more than the original product.…”

Section: Resultsmentioning

confidence: 99%

Hydroquinone Ecotoxicity: Unveiling Risks in Soil and River Ecosystems with Insights into Microbial Resilience

Valenzuela,

Ballestero,

Gan

et al. 2024

Toxics

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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.

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“…Toxicity of HQ to the bacteria V. fischeri is illustrated in Figure 1b and the obtained EC50 was 1.446 (1.155-1.796) µg/mL. Limited data exist on the toxicity of HQ to V. fischeri, as studies typically focus on the toxicity of by-products, including HQ, generated during the decomposition of various products such as paracetamol [51], benzidine [52], benzoquinone [53], sulfamethoxazole [54], sulfanilamide [55] or clofibric acid [56] among others. It is noteworthy that almost all studies agree that HQ is one of the most toxic by-products, even more than the original product.…”

Section: Impact Of Hydroquinone On V Fisherimentioning

confidence: 99%

Hydroquinone Ecotoxicity: Unveiling Risks in Soil and River Ecosystems with Insights into Microbial Resilience

Valenzuela,

Ballestero,

Gan

et al. 2023

Preprint

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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, Vibrio fischeri, Allium cepa, and Eisenia fetida. For a more environmentally realistic assessment, microbial communities from a river and un-treated 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 V. 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 re-duction 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 en-vironmental regulations.

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Toxicological Profile of 1,4-Benzoquinone and Its Degradation By-Products during Electro-Fenton, Electrocoagulation, and Electrosynthesized Fe(VI) Oxidation

Cited by 5 publications

References 32 publications

Electrochemical Technologies for Detecting and Degrading Benzoquinone Using Diamond Films

Electrochemical Technologies for Detecting and Degrading Benzoquinone Using Diamond Films

Hydroquinone Ecotoxicity: Unveiling Risks in Soil and River Ecosystems with Insights into Microbial Resilience

Hydroquinone Ecotoxicity: Unveiling Risks in Soil and River Ecosystems with Insights into Microbial Resilience

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