Oxidative treatment of bisphenol A by Fe(VI) and Fe(VI)/H2O2 and identification of the degradation products

Widhiastuti, Fitri; Fan, Linhua; Paz‐Ferreiro, Jorge; Chiang, Kin Seng

doi:10.1016/j.eti.2022.102643

Cited by 8 publications

(3 citation statements)

References 65 publications

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“…After the first 15 min of exposure to US, compounds such as monohydroxylated bisphenol A and dihydroxylated bisphenol A with small chains of carbon atoms such as acetic acid, formic acid, oxalic acid [22]. Another compound that resulted in the first 15 min was p-benzyl, p-phenyl isopropane, which is toxic for the environment [23] and which must be subjected to advanced oxidation. After 30 min of exposure to US, fragments such as 4 isoprophenyl phenol and 4-hydroxyacetophenone appeared.…”

Section: Influence Of Us Frequencymentioning

confidence: 99%

“…In the first 15 min, oxidized species such as monohydroxylated bisphenol A [27], dihydroxylated bisphenol A [28], vicinal dihydroxy and dicarbonyl compounds [29], and mono-or di-carboxylic compounds [30], were formed, resulting from the split of one of the aromatic rings. They were degraded into carboxylic acids step by step, with a small number of carbon atoms, and other components such as 4-Hydroxyphenacyl alcohol, 4-(2Hysroxypropan-2yl)phenol, 4-isopropanephenol, 4-prophyl benzyl acetaldehyde, and partially oxidized compounds, with lower or higher toxicity [21,23,29,31], which require further oxidization. Additionally, Pphenyl-p-benzyl-isopropane was formed-a reduced, very toxic compound [32].…”

Section: Influence Of CCL 4 As Additional Compoundmentioning

confidence: 99%

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Enhanced Degradation of Bisphenol A via Ultrasound, Assisted by Chemical Treatment

Pahontu (Dura),

Stefan,

Chiriac

et al. 2023

Sustainability

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Ultrasonic technology (US) can be considered a very sustainable and efficient method to remove bisphenol A (BPA) from water. Compared with other methods, the proposed method has some advantages: a simple implementation on existing water treatment and purification facilities, it does not generate residual compounds that produce sludge, a relatively fast time is required for degradation (1–2 h), and high degradation efficiencies. In this work, we present the results regarding BPA degradation efficiency using the ultrasonic technique. The influence of frequency and of some additional compounds, such as carbon tetrachloride (CCl4), FeSO4 7H2O (FS), and ethyl anthraquinone (EAC), were studied. Three different frequencies were used: 1146 kHz, 864 kHz, and 580 kHz, at 50 W. The sampling, performed every 15 min, revealed that the highest BPA degradation was achieved after 60 min. Using the liquid chromatography tandem mass spectrometry (LC-MS/MS) technique, the degradation compounds were identified. Pathways of BPA degradation were also proposed. The use of additives such as CCl4, FS, and EAC proved to have a positive effect on the BPA degradation process assisted by ultrasound. After 60 min of exposure, the degradation capacities reached values of between 50% and 75%, while the mineralization capacities were situated between 20% and 35%. CCl4 and EAC had a more pronounced stimulating action than FS, with the EAC having the highest mineralization capacity, representing around 75% of the degradation capacity.

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Section: Influence Of Us Frequencymentioning

confidence: 99%

Section: Influence Of CCL 4 As Additional Compoundmentioning

confidence: 99%

Enhanced Degradation of Bisphenol A via Ultrasound, Assisted by Chemical Treatment

Pahontu (Dura),

Stefan,

Chiriac

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

“…However, a closer lens reveals a recurring theme: much of the current research predominantly revolves around mildly alkaline pH zones, hinting at the pressing need for more expansive pH-centric studies . Digging further, the role of H 2 O 2 appears pivotal in the intricate combination of Fe(VI) and PAA . Spawned from the disintegration of Fe(VI), it bolsters the system’s efficiency, steering Fe(VI) toward an intermediate valence state of iron.…”

Section: Introductionmentioning

confidence: 99%

pH-Driven Efficacy of the Ferrate(VI)–Peracetic Acid System in Swift Sulfonamide Antibiotic Degradation: A Deep Dive into Active Species Evolution and Mechanistic Insights

Chen,

Bai,

Sun

et al. 2023

Environ. Sci. Technol.

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In the realm of wastewater treatment, the power of ferrate (Fe(VI)) and peracetic acid (PAA) as oxidants stands out. But their combined might is where the enhancement truly lies. Their collaborative effect intensifies, but the underlying mechanics, especially across varying pH levels and pollutant types, still lurks in obscurity.Our study delved into the sophisticated oxidation interplay among Fe(VI)−PAA, Fe(VI)−H 2 O 2 , and standalone Fe(VI) systems. Notably, at a pH of 9.0, boasting a kinetic constant of ∼0.127 M −1 • s −1 , the Fe(VI)−PAA system annihilated the pollutant sulfamethoxazole, outpacing its counterparts by a staggering 48.73-fold when compared to the Fe(VI)−H 2 O 2 system and 105.58-fold when using Fe(VI) individually. The behavior of active species�such as the dynamic •OH radicals and high-valent iron species (Fe(IV)/ Fe(V))�shifted with pH variations, leading to distinct degradation pathways. Our detailed exploration pinpoints the behaviors of certain species across pH levels from 3.0 to 9.0. In more acidic environments, the •OH species proved indispensable for the system's reactivity. Conversely, as the pH inclined, degradation was increasingly steered by high-valent iron species. This intensive probe demystifies Fe(VI) interactions, deepening our understanding of the capabilities of the Fe(VI)-centered system and guiding us toward cleaner water solutions. Importantly, pH value, often underappreciated, holds the reins in organic wastewater decontamination. Embracing this key player is vital as we strategize for more expansive systems in upcoming ventures.

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Unveiling the activation mechanism: The role of nitrogen-doped biochar in enhancing Fe(VI) catalysis

Deng,

Han,

et al. 2024

Chemical Engineering Journal

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Oxidative treatment of bisphenol A by Fe(VI) and Fe(VI)/H2O2 and identification of the degradation products

Cited by 8 publications

References 65 publications

Enhanced Degradation of Bisphenol A via Ultrasound, Assisted by Chemical Treatment

Enhanced Degradation of Bisphenol A via Ultrasound, Assisted by Chemical Treatment

pH-Driven Efficacy of the Ferrate(VI)–Peracetic Acid System in Swift Sulfonamide Antibiotic Degradation: A Deep Dive into Active Species Evolution and Mechanistic Insights

Unveiling the activation mechanism: The role of nitrogen-doped biochar in enhancing Fe(VI) catalysis

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