Molecular and kinetic insights to boron boosted Fenton-like activation of peroxymonosulfate for water decontamination

Zhou, Peng; Yang, Yangyang; Ren, Wei; Li, Xiaojie; Zhang, Yongli; Lai, Bo; Wang, Shaobin; Duan, Xiaoguang

doi:10.1016/j.apcatb.2022.121916

Cited by 32 publications

(3 citation statements)

References 54 publications

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“…21,22 Moreover, many boron-containing compounds were also developed to improve the efficiency of the iron cycle. [23][24][25][26][27][28][29] In the periodic table, the specic electronic conguration (1s 2 2s 2 2p 1 ) of the metalloid element boron usually endows boron with high affinity to the metalloid and metal elements. Boron atoms with low valency on the surface of boron powder could provide electrons for Fe(III) species to generate Fe(II).…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Fe(ii)/Fe(iii) cycle by boron enabled efficient Cr(vi) removal with microscale zero-valent iron

Shen,

Gao,

Liu

et al. 2024

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

“…21,22 Moreover, many boron-containing compounds were also developed to improve the efficiency of the iron cycle. 23–29…”

Section: Introductionmentioning

confidence: 99%

Enhanced Fe(ii)/Fe(iii) cycle by boron enabled efficient Cr(vi) removal with microscale zero-valent iron

Shen,

Gao,

Liu

et al. 2024

RSC Adv.

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“…How to utilize Fe(III) that is conveniently and cost-effectively obtained and converted to Fe(II) remains to be studied. Considering the slow spontaneous conversion rate of Fe(III) back to Fe(II) ( k = 2.72 ± 0.38 M –1 s –1 ), several strategies have been proposed to accelerate the Fe(II)/Fe(III) conversion . For example, chelating agents, such as oxalate, citrate, picolinic acid, and ethylenediaminetetraacetic acid, can increase the concentration of dissolved Fe species. , Gallic acid (GA), a natural phenolic compound widespread in plants, is ubiquitous in water and wastewater as a component of natural organic matter (NOM) .…”

Section: Introductionmentioning

confidence: 99%

Gallic Acid Accelerates the Oxidation Ability of the Peracetic Acid/Fe(III) System for Bisphenol A Removal: Fate of Various Radicals

et al. 2023

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Conveniently and cost-effectively obtained Fe(III) can be utilized for peracetic acid (PAA) activation in the presence of natural polyphenols. However, the effect of polyphenols on the fate of generated reactive oxygen species (ROS) remains unclear. In this study, it was demonstrated that Fe(III) can efficiently trigger PAA oxidation of pollutants with the assistance of gallic acid (GA), a widely distributed natural polyphenol. The GA/Fe(III)/PAA system efficiently removed bisphenol A (BPA) over a wide initial pH range of 4.0−7.0, with a removal rate of >90% over 20 min. Further, •OH played a dominant role in BPA degradation, and O 2 •− functioned as an intermediate contributing to the partial generation of •OH. The generated organic radicals (R-O•) did not considerably contribute to BPA removal. Apart from GA itself, both the reaction intermediates (phenoxy radicals) of GA with ROS and BPA degradation intermediates were crucial for the regeneration of Fe(II) from Fe(III) and the subsequent enhanced activation of PAA. Notably, further comprehensive analysis revealed an increase in •OH yield, but a decrease in R-O• production as the dosage of GA was increased from 10 to 100 μM. This finding emphasized the importance of properly utilizing GA, considering the reactivity of varied ROS toward different contaminants. R-O• (CH 3 CO 2 • and CH 3 CO 3 •) was quickly consumed by the GA-Fe(II) complex through single-electron transfer (SET) and/or by GA via H-abstraction (HAA). This study proposes a promising strategy for improving the Fe(III)/PAA process and advances the understanding of the trade-off between radical generation and elimination by polyphenols in PAA-based advanced oxidation processes (AOPs).

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The Lifetime of Hydroxyl Radical in Realistic Fuel Cell Catalyst Layer

Lv,

Xu,

Zhao

et al. 2024

ChemSusChem

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The lifetime of hydroxyl radicals (•OH) in the fuel cell catalyst layer remains uncertain, which hampers the comprehension of radical‐induced degradation mechanisms and the development of longevity strategies for proton‐exchange membrane fuel cells (PEMFCs). In this study, we have precisely determined that the lifetime of •OH radicals can extend up to several seconds in realistic fuel cell catalyst layers. This finding reveals that •OH radicals are capable of carrying out long‐range attacks spanning at least a few centimeters during PEMFCs operation. Such insights hold great potential for enhancing our understanding of radical‐mediated fuel cell degradation processes and promoting the development of durable fuel cell devices.

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Molecular and kinetic insights to boron boosted Fenton-like activation of peroxymonosulfate for water decontamination

Cited by 32 publications

References 54 publications

Enhanced Fe(ii)/Fe(iii) cycle by boron enabled efficient Cr(vi) removal with microscale zero-valent iron

Enhanced Fe(ii)/Fe(iii) cycle by boron enabled efficient Cr(vi) removal with microscale zero-valent iron

Gallic Acid Accelerates the Oxidation Ability of the Peracetic Acid/Fe(III) System for Bisphenol A Removal: Fate of Various Radicals

The Lifetime of Hydroxyl Radical in Realistic Fuel Cell Catalyst Layer

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