Accelerated iron cycle inducing molecular oxygen activation for deep oxidation of aromatic VOCs in MoS2 co-catalytic Fe3+/PMS system

Xie, Xiaowen; Cao, Jiachun; Xiang, Yongjie; Xie, Ruijie; Suo, Ziyi; Ao, Zhimin; Yang, Xin; Huang, Haibao

doi:10.1016/j.apcatb.2022.121235

Cited by 63 publications

(14 citation statements)

References 53 publications

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“…23 The unsaturated sulfur on MoS 2 can capture protons and induce the exposure of Mo(IV) active sites, accelerating the transformation of high-valent metals to low-valent metals to support the PMS activation. 24 Wang et al reported that MoS 2 could serve as a cocatalyst to break the limiting step of the conversion of Fe(III) from Fe(II) to produce more ROS in the Fe(II)/PMS system. 25 PMS can also be directly activated by MoS 2 because of the strong affinity between PMS and MoS 2 , but the catalytic activity was far from satisfactory due to the very limited edge active site and low surface area.…”

Section: Introductionmentioning

confidence: 99%

MoS₂ Nanosheets Anchored onto MIL-100(Fe)-Derived FeS₂ as a Peroxymonosulfate Activator for Efficient Sulfamethoxazole Degradation: Insights into the Mechanism

et al. 2022

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By anchoring MoS2 nanosheets onto FeS2 derived from different MIL-100(Fe) precursors, a series of FeS2@MoS2-x samples featuring sulfur vacancies (SVs) were prepared as efficient peroxymonosulfate (PMS) activators to degrade sulfamethoxazole (SMX) from aqueous solution. Benefiting from the strongly reductive sulfur species (S2– and S2 2–), enriched Mo(IV) sites, and abundant SVs, 40 μM SMX was completely removed by the FeS2@MoS2-2/PMS system in 7 min (0.2 g/L FeS2@MoS2-2, 0.25 mM PMS). The k obs obtained by FeS2@MoS2-2 was 0.598 min–1, which was 5.8 and 51.1 times higher than that of FeS2 (0.103 min–1) and MoS2 (0.012 min–1), respectively. Quenching experiments, electron paramagnetic resonance (EPR) analysis, and 18O isotope labeling tests evidenced the involvement of radical (•OH, SO4 •–) and non-radical (1O2, FeIV = O) pathways in the FeS2@MoS2-2/PMS system, and MoS2 anchoring enormously enhanced the contribution of non-radicals to 45.5%. In addition, SVs possessed favorable affinity toward PMS and dissolved oxygen (DO), promoting continuous production of reactive active species. The degradation pathways of SMX were unveiled as well. The satisfactory recyclability, stability, and universality enabled FeS2@MoS2-2 to serve as a promising candidate for PMS activation. This study provides a novel strategy to construct sulfur vacancy-featuring Fe-based sulfide catalysts using MIL-100(Fe) as sacrificial templates for activating PMS to treat refractory organic-polluted water.

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Section: Introductionmentioning

confidence: 99%

MoS₂ Nanosheets Anchored onto MIL-100(Fe)-Derived FeS₂ as a Peroxymonosulfate Activator for Efficient Sulfamethoxazole Degradation: Insights into the Mechanism

et al. 2022

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“…6 Moreover, PMS-based oxidation was readily accessible in a wider pH range compared with the Fenton system. 11,12 The high redox potentials of SO 4…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, more research has been focused on heterogeneous AOPs. , Among them, peroxymonosulfate (PMS) activation is one of the research hotspots as its asymmetric molecule can be easily activated to generate • OH and SO 4 •– . Moreover, PMS-based oxidation was readily accessible in a wider pH range compared with the Fenton system. , The high redox potentials of SO 4 •– ( E 0 = 2.5–3.1 V) and • OH ( E 0 = 1.8–2.7 V) endow PMS-based oxidation with high reactivity toward refractory substances . The recyclability and recovery of the catalyst are as important as improving the catalytic efficiency toward heterogeneous AOPs. , …”

Section: Introductionmentioning

confidence: 99%

Layer-by-Layer-Assembled Loose Nanofiltration Membrane for Persulfate Activity Enhancement: Performance and Process Regulation

Liu

Xue

et al. 2022

ACS EST Water

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In this study, a Prussian blue analogue (PBA)-intercalated magnesium aluminum hydrotalcite (PBA–LDH) material was used to successfully modify the membrane surface by layer-by-layer synthesis with an intermediate layer inspired by dopamine polymerization (polydopamine (PDA)). The PBA–LDH@PDA membrane was endowed with highly efficient peroxymonosulfate (PMS) activation and superb antifouling properties. Quenching experiments implied that SO4 •– mainly contributed to the sulfadiazine (SDZ) degradation in the PBA–LDH@PDA membrane-activated PMS system and performed well under various conditions. On the other hand, the PBA–LDH@PDA membrane was confirmed to exhibit separation by loose nanofiltration. The fouling performance of the membrane identified an extremely low flux attenuation even when 60 mg/L bovine serum albumin (BSA) was filtered. Multicycle filtration experiments demonstrated extremely low fouling accumulation of the membrane. The loose nanofiltration membrane with PMS activation properties possesses multiple advantages: activation of PMS by the filtration process provides a space in which the catalyst, oxidant, and foulant can completely react; the two goals of fouling mitigation and target foulant removal can be mutually realized by controlling the operating parameters (e.g., PMS dosage and filtration pressure). Overall, this study provides a beneficial strategy for improving the efficiency of membrane filtration and foulant removal.

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“…With the rapid development of the chemical industry and the extensive use of chemical products, the pollution situation of aromatic VOCs is becoming more and more serious 1,2 . Among them, benzene, toluene, ethylbenzene and m-xylene are considered to be the most common VOCs pollution in chemical contaminated sites, and recent domestic research reports also showed that chlorinated hydrocarbons including chlorobenzene, p-chlorotoluene and p-chlorotrifluorotoluene are also ubiquitous [3][4][5][6] .…”

mentioning

confidence: 99%

“…To fill these knowledge gaps, the model of Monod, Moser, Tessier and Cotonis were used in this study to simulate the microbial growth kinetics and aromatic VOCs degradation kinetics during the biodegradation process by functional bacteria. The specific objectives of this study were to investigate (1) the appropriate kinetics model by kinetic fitting comparation at laboratory scale; (2) the degradation ability and dominant potential of the constructed functional bacteria based on the specific kinetic parameters; and (3) provide theoretical basis and support for dynamic simulation and field engineering of aromatic VOCs treatment.…”

mentioning

confidence: 99%

Degradation kinetics of aromatic VOCs polluted wastewater by functional bacteria at laboratory scale

Wang

Liu

et al. 2022

Sci Rep

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Reaction kinetics in biodegradation process is the basis and key of bioremediation technology, which can be used to predict the interaction between microorganisms and environmental states in the system. In this study, the kinetic model (Monod, Moser, Tessier and Cotonis) and kinetic parameters of aerobic biodegradation of functional bacteria in simulated wastewater polluted by aromatic volatile organic compounds (VOCs) were determined by shaking flask experiment. Monod, Moser, Tessier and Contois models were used to fit the experimental data and determine the kinetic parameters based on nonlinear regression analysis. Experimental results demonstrated that the removal rate of aromatic VOCs at 72 h was between 34.78 and 99.75% depending on the initial concentration of aromatic VOCs. The specific growth rate μ and degradation rate q increased with the increase of substrate concentration. The model of Monod, Moser and Tessier could be used to simulate microbial growth and substrate degradation in simulated aromatic VOCs polluted wastewater. Then the model and corresponding kinetic parameters were used to predict the limit concentration of biodegradation and provide theoretical support for the subsequent dynamic simulation and field engineering.

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Accelerated iron cycle inducing molecular oxygen activation for deep oxidation of aromatic VOCs in MoS2 co-catalytic Fe3+/PMS system

Cited by 63 publications

References 53 publications

MoS₂ Nanosheets Anchored onto MIL-100(Fe)-Derived FeS₂ as a Peroxymonosulfate Activator for Efficient Sulfamethoxazole Degradation: Insights into the Mechanism

MoS₂ Nanosheets Anchored onto MIL-100(Fe)-Derived FeS₂ as a Peroxymonosulfate Activator for Efficient Sulfamethoxazole Degradation: Insights into the Mechanism

Layer-by-Layer-Assembled Loose Nanofiltration Membrane for Persulfate Activity Enhancement: Performance and Process Regulation

Degradation kinetics of aromatic VOCs polluted wastewater by functional bacteria at laboratory scale

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Accelerated iron cycle inducing molecular oxygen activation for deep oxidation of aromatic VOCs in MoS2 co-catalytic Fe3+/PMS system

Cited by 63 publications

References 53 publications

MoS2 Nanosheets Anchored onto MIL-100(Fe)-Derived FeS2 as a Peroxymonosulfate Activator for Efficient Sulfamethoxazole Degradation: Insights into the Mechanism

MoS2 Nanosheets Anchored onto MIL-100(Fe)-Derived FeS2 as a Peroxymonosulfate Activator for Efficient Sulfamethoxazole Degradation: Insights into the Mechanism

Layer-by-Layer-Assembled Loose Nanofiltration Membrane for Persulfate Activity Enhancement: Performance and Process Regulation

Degradation kinetics of aromatic VOCs polluted wastewater by functional bacteria at laboratory scale

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Product

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MoS₂ Nanosheets Anchored onto MIL-100(Fe)-Derived FeS₂ as a Peroxymonosulfate Activator for Efficient Sulfamethoxazole Degradation: Insights into the Mechanism

MoS₂ Nanosheets Anchored onto MIL-100(Fe)-Derived FeS₂ as a Peroxymonosulfate Activator for Efficient Sulfamethoxazole Degradation: Insights into the Mechanism