Efficient catalytic degradation of bisphenol A coordinated with peroxymonosulfate via anchoring monodispersed zero-valent iron on natural kaolinite

Li, Chunquan; Yang, Shanshan; Bian, Runze; Tan, Ye; Zhang, Xiangwei; Zheng, Shuilin; Sun, Zhiming

doi:10.1016/j.cej.2022.137746

Cited by 51 publications

(5 citation statements)

References 60 publications

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“…As observed in Fig. 3 A , from the perspective of Fe 0 core, the lattice fringe of Fe 0 could not be observed in the core of nZVI, which might be caused by stacked nZVI particles or poor local crystallization ( 47 ). However, the core of SnZVI and SnZVI@PBC displayed distinct lattice fringes with a distance of 0.205 and 0.208 nm, respectively, corresponding to the (110) facets of α-Fe ( Fig.…”

Section: Resultsmentioning

confidence: 86%

A multiple Kirkendall strategy for converting nanosized zero-valent iron to highly active Fenton-like catalyst for organics degradation

Qu,

Li,

et al. 2023

Proc. Natl. Acad. Sci. U.S.A.

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Nanosized zero-valent iron (nZVI) is a promising persulfate (PS) activator, however, its structurally dense oxide shell seriously inhibited electrons transfer for O-O bond cleavage of PS. Herein, we introduced sulfidation and phosphorus-doped biochar for breaking the pristine oxide shell with formation of FeS and FePO 4 -containing mixed shell. In this case, the faster diffusion rate of iron atoms compared to shell components triggered multiple Kirkendall effects, causing inward fluxion of vacancies with further coalescing into radial nanocracks. Exemplified by trichloroethylene (TCE) removal, such a unique “lemon-slice-like” nanocrack structure favored fast outward transfer of electrons and ferrous ions across the mixed shell to PS activation for high-efficient generation and utilization of reactive species, as evidenced by effective dechlorination (90.6%) and mineralization (85.4%) of TCE. O 2 • - contributed most to TCE decomposition, moreover, the SnZVI@PBC gradually became electron-deficient and thus extracted electrons from TCE with achieving nonradical-based degradation. Compared to nZVI/PS process, the SnZVI@PBC/PS system could significantly reduce catalyst dosage (87.5%) and PS amount (68.8%) to achieve nearly complete TCE degradation, and was anti-interference, stable, and pH-universal. This study advanced mechanistic understandings of multiple Kirkendall effects-triggered nanocrack formation on nZVI with corresponding rational design of Fenton-like catalysts for organics degradation.

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Section: Resultsmentioning

confidence: 86%

A multiple Kirkendall strategy for converting nanosized zero-valent iron to highly active Fenton-like catalyst for organics degradation

Qu,

Li,

et al. 2023

Proc. Natl. Acad. Sci. U.S.A.

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“…Additionally, microporous pores have dimensions less than 2 nm, while macroporous pores have dimensions greater than 50 nm (Tella et al 2022 ). The nitrogen adsorption-desorption isotherm plot of P-NZVI corresponds to a typical type IV isotherm, indicating the presence of a mesoporous structure according to the IUPAC classification (Du et al 2019 ; Li et al 2022a ). The BET surface area, average pore width, and total pore volume of P-NZVI were identified to be 52.69 m 2 /g, 4.68 nm, and 0.06 cm 3 /g, respectively.…”

Section: Resultsmentioning

confidence: 99%

Green low-cost synthesis of zero-valent iron nanoparticles from Palm Petiole Extract for Cr(VI) removal from water

Tesnim,

Hédi,

Ridha

et al. 2024

Environ Sci Pollut Res

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One of the hottest research topics over the last decades was the valorization or/and recycling of agro-industrial wastes into different valuable liquid or solid products, which is considered a sustainable and low-cost approach. In this study, we developed zero-valent iron nanoparticles from Palm Petiole Extract (P-NZVI) using a green and straightforward approach. The as-synthesized P-NZVI was used to adsorb Cr(VI) in water. The physico-chemical characterizations of P-NZVI, including the particle size, crystalline structure, surface area, morphology, and functional groups, were investigated via several techniques such as UV-vis spectroscopy, SEM, TEM, XRD, FTIR, AFM, DLS, pHZPC measurement, and BET analysis. The adsorption performance of P-NZVI was studied under different operational parameters, including pollutant concentration, pH, temperature, and adsorbent mass. The adsorption rate was found to be 89.3% within 40 min, corresponding to the adsorption capacity of 44.47 mg/g under the following conditions: initial Cr(VI) concentration of 40 mg/L, pH 5, and a P-NZVI dosage of 1 g/L. It was found that the adsorption pattern follows the Langmuir and the pseudo-second-order kinetic models, indicating a combination of monolayer adsorption and chemisorption mechanisms. The thermodynamic study shows that the adsorption process is endothermic and spontaneous. The reusability of P-NZVI was carried out four times, showing a slight decrease from 89.3 to 87%. These findings highlight that P-NZVI’s could be an effective green adsorbent for removing Cr(VI) or other types of toxic pollutants from water.

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“…In addition, bimetallic nanoparticles can eliminate heavy metals. The efficiency of removing divalent copper ions by kaolinite-embedded Fe/Ni nanoparticles is 99.8% (C Li et al, 2022;Zhan et al, 2021). Metal oxides possess the ability to effectively remove heavy metals from water.…”

Section: Metal-based Nanomaterials For Efficient Heavy Metal Remediationmentioning

confidence: 99%

Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

Karnwal,

Malik

2024

Front. Environ. Sci.

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Engineered nanomaterials have emerged as a promising technology for water treatment, particularly for removing heavy metals. Their unique physicochemical properties enable them to adsorb large quantities of metals even at low concentrations. This review explores the efficacy of various nanomaterials, including zeolites, polymers, chitosan, metal oxides, and metals, in removing heavy metals from water under different conditions. Functionalization of nanomaterials is a strategy to enhance their separation, stability, and adsorption capacity. Experimental parameters such as pH, adsorbent dosage, temperature, contact time, and ionic strength significantly influence the adsorption process. In comparison, engineered nanomaterials show promise for heavy metal remediation, but several challenges exist, including aggregation, stability, mechanical strength, long-term performance, and scalability. Furthermore, the potential environmental and health impacts of nanomaterials require careful consideration. Future research should focus on addressing these challenges and developing sustainable nanomaterial-based remediation strategies. This will involve interdisciplinary collaboration, adherence to green chemistry principles, and comprehensive risk assessments to ensure the safe and effective deployment of nanomaterials in heavy metal remediation at both lab and large-scale levels.

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Efficient catalytic degradation of bisphenol A coordinated with peroxymonosulfate via anchoring monodispersed zero-valent iron on natural kaolinite

Cited by 51 publications

References 60 publications

A multiple Kirkendall strategy for converting nanosized zero-valent iron to highly active Fenton-like catalyst for organics degradation

A multiple Kirkendall strategy for converting nanosized zero-valent iron to highly active Fenton-like catalyst for organics degradation

Green low-cost synthesis of zero-valent iron nanoparticles from Palm Petiole Extract for Cr(VI) removal from water

Nano-revolution in heavy metal removal: engineered nanomaterials for cleaner water

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