Roles of hydroxyl and carbonate radicals in bisphenol a degradation <i>via</i> a nanoscale zero-valent iron/percarbonate system: influencing factors and mechanisms

Xiao, Yulun; Liu, Xiang; Huang, Ying; Wei, Kang; Wang, Zhen; Zheng, Han

doi:10.1039/d0ra08395j

Cited by 21 publications

(4 citation statements)

References 61 publications

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“…According to the peak area corresponding to each binding energy, the contents of Fe 0 , Fe 2+ , and Fe 3+ were 8.83%, 46.10%, and 45.07%, respectively, indicating that various forms of iron series were loaded on the surface of the Ni-nZVI composite. The results imply that part of the ZVI in the Ni-nZVI composite was oxidized into Fe 2+ and Fe 3+ during storage and characterization [31].…”

Section: X-ray Photoelectron Spectrometermentioning

confidence: 84%

Removal of Trichloroethylene from Water by Bimetallic Ni/Fe Nanoparticles

Liu

Jian

2022

Water

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Chlorinated organic solvents (COSs) are a significant threat to human beings. In this study, nanoscale bimetallic Ni/Fe particles were synthesized from the reaction of sodium borohydride (NaBH4) with the reduction of Ni2+ and Fe2+ in an aqueous solution. The synthesized nanoscale zero-valent iron (nZVI) and Ni-nZVI were characterized by SEM (scanning electron microscopy), XRD (X-ray diffractometer), Brunauer–Emmett–Teller (BET), and transmission electron microscopy (TEM). The removal performance of trichloroethylene (TCE) over the nZVI catalyst and Ni-nZVI was evaluated. Ni-nZVI with different Ni contents exhibited good reactivity towards the dechlorination of TCE over a 1h period, and the pseudo-first-order rate constant for TCE dechlorination by Ni-nZVI was 1.4–3.5 times higher than that of nZVI. Ni-nZVI with 5 wt% Ni contents exhibited the best dechlorination effect; the removal rates of TCE and its by-product dichloroethylene (DCE) were 100% and 63.69%, respectively. These results indicated that the Ni nanoparticles as the second dopant metal were better than nZVI for TCE degradation. This determination of the optimal Ni-NZVI load ratio provides a factual and theoretical basis for the subsequent application of nano-metal binding in the environment.

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Section: X-ray Photoelectron Spectrometermentioning

confidence: 84%

Removal of Trichloroethylene from Water by Bimetallic Ni/Fe Nanoparticles

Liu

Jian

2022

Water

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“…With the help of the NZ-nZVI/SPC system, the majority (more than 90 %) of dyes are removed from water within 180 min. By increasing the loading of nZVI and the SPC concentration, a significant degree of bisphenol (BPA) degradation is achieved 96 . As a result of surface corrosion, iron(II) and (III) ions are released and radicals are generated, the first of which was dominant in the process of BPA oxidation.…”

Section: Heterogeneous Activation Of Spcmentioning

confidence: 99%

Activated Periodates and Sodium Percarbonate in Advanced Oxidation Processes of Organic Pollutants in Aqueous Media: A Review

Sukhatskiy,

Znak,

Sozanskyi

et al. 2024

ChChT

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The methods of periodates and sodium percarbonate activation are considered for planning strategic approaches to increasing the efficiency and intensity of oxidative degradation of organic pollutants in aquatic environments. A classification of periodate activation methods is proposed, including activation methods by external energy effects, catalytic activation methods, and other activation methods (e.g., by hydrogen peroxide, by hydroxylamine, activation in alkaline medium). Activation methods for sodium percarbonate were divided into homogeneous and heterogeneous activation methods.

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“…Percarbonate, known as solid H 2 O 2 , has emerged as a desirable oxidant in AOPs due to its advantages of being more stable, having a wider pH range of applicability, being lower cost, nontoxic, and environmentally friendly [151,152]. Additionally, the byproducts in the decomposition of percarbonate are low-hazardous Na 2 CO 3 and H 2 O 2 ; thus, percarbonate was suggested as a novel source of H 2 O 2 (Equation ( 63)).…”

Section: Percarbonate-based Aopsmentioning

confidence: 99%

“…Moreover, the activation of sodium percarbonate, which is attributed to (i) the surface corrosion of nZVI, (ii) Fe 2+ release, and (iii) conversion of iron species, can generate •OH and •CO3 − , the for- Rashid et al adopted natural zeolite as a support to load nZVI (NZ-nZVI) to activate sodium percarbonate for the removal of MO, and more than 90% of dyes can be removed within 180 min using this approach [153]. Xiao et al investigated multiple influencing factors (nZVI loading, sodium percarbonate dosing, initial pH, the presence of inorganic anions, and humic acid) on BPA removal with the combination of nZVI and sodium percarbonate [152]. This work indicated that the degradation efficiency of BPA can be enhanced with increased nZVI loading and sodium percarbonate dosing in the adequate range at a low initial pH; the presence of inorganic anions (Cl − , HPO 4 2− , NO 2 − ) and HA in an aqueous solution inhibited the removal of BPA in the selected range.…”

Section: Percarbonate-based Aopsmentioning

confidence: 99%

Recent Advances in Nanoscale Zero-Valent Iron (nZVI)-Based Advanced Oxidation Processes (AOPs): Applications, Mechanisms, and Future Prospects

Liu,

Ye,

et al. 2023

Nanomaterials

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The fast rise of organic pollution has posed severe health risks to human beings and toxic issues to ecosystems. Proper disposal toward these organic contaminants is significant to maintain a green and sustainable development. Among various techniques for environmental remediation, advanced oxidation processes (AOPs) can non-selectively oxidize and mineralize organic contaminants into CO2, H2O, and inorganic salts using free radicals that are generated from the activation of oxidants, such as persulfate, H2O2, O2, peracetic acid, periodate, percarbonate, etc., while the activation of oxidants using catalysts via Fenton-type reactions is crucial for the production of reactive oxygen species (ROS), i.e., •OH, •SO4−, •O2−, •O3CCH3, •O2CCH3, •IO3, •CO3−, and 1O2. Nanoscale zero-valent iron (nZVI), with a core of Fe0 that performs a sustained activation effect in AOPs by gradually releasing ferrous ions, has been demonstrated as a cost-effective, high reactivity, easy recovery, easy recycling, and environmentally friendly heterogeneous catalyst of AOPs. The combination of nZVI and AOPs, providing an appropriate way for the complete degradation of organic pollutants via indiscriminate oxidation of ROS, is emerging as an important technique for environmental remediation and has received considerable attention in the last decade. The following review comprises a short survey of the most recent reports in the applications of nZVI participating AOPs, their mechanisms, and future prospects. It contains six sections, an introduction into the theme, applications of persulfate, hydrogen peroxide, oxygen, and other oxidants-based AOPs catalyzed with nZVI, and conclusions about the reported research with perspectives for future developments. Elucidation of the applications and mechanisms of nZVI-based AOPs with various oxidants may not only pave the way to more affordable AOP protocols, but may also promote exploration and fabrication of more effective and sustainable nZVI materials applicable in practical applications.

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Roles of hydroxyl and carbonate radicals in bisphenol a degradation via a nanoscale zero-valent iron/percarbonate system: influencing factors and mechanisms

Abstract: Both ˙OH and CO3˙− participated in the degradation of BPA in the nZVI/SPC system, and ˙OH was the main radical.

Cited by 21 publications

References 61 publications

Removal of Trichloroethylene from Water by Bimetallic Ni/Fe Nanoparticles

Removal of Trichloroethylene from Water by Bimetallic Ni/Fe Nanoparticles

Activated Periodates and Sodium Percarbonate in Advanced Oxidation Processes of Organic Pollutants in Aqueous Media: A Review

Recent Advances in Nanoscale Zero-Valent Iron (nZVI)-Based Advanced Oxidation Processes (AOPs): Applications, Mechanisms, and Future Prospects

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