Preparation of nZVI embedded modified mesoporous carbon for catalytic persulfate to degradation of reactive black 5

Ma, Zhifei; Cao, Huali; Lv, Fengchun; Yang, Yu; Chen, Chen; Yang, Tianxue; Zheng, Hui; Wu, Daishe

doi:10.1007/s11783-020-1372-4

Cited by 24 publications

(6 citation statements)

References 36 publications

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“…g g g g g gl (5) where ρ g is the gas density, ϕ g is the gas volume fraction, u g is the gas velocity vector, and m gl is the mass transfer rate from the gas to the liquid. The flow field of most bubble flows is turbulent.…”

Section: Kinetic Modelingmentioning

confidence: 99%

“…As highlighted by the United Nations Sustainable Development Goals, to improve water quality and increase safe reuse has become a necessity, which calls for advanced wastewater treatment and further recycling. With a high yield of reactive oxygen species (ROS) such as hydroxyl radicals ( • OH), advanced oxidation processes (AOPs) could achieve complete degradation and mineralization of organic pollutants. − As one of the AOPs, heterogeneous catalytic ozonation (HCO) has been widely used for its efficient production of ROS and rapid removal of recalcitrant contaminants and pathogenic microorganisms. − …”

Section: Introductionmentioning

confidence: 99%

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Revisit the Role of Salinity in Heterogeneous Catalytic Ozonation: The Trade-Off between Reaction Inhibition and Mass Transfer Enhancement

Ren

Yan

et al. 2023

Environ. Sci. Technol.

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Heterogeneous catalytic ozonation (HCO) is an effective technology for advanced wastewater treatment, while the influence of coexisting salts remains unclear and controversial. Here, we systematically explored the influence of NaCl salinity on the reaction and mass transfer of HCO through lab experiments, kinetic simulation, and computational fluid dynamics modeling, and proposed that the trade-off between reaction inhibition and mass transfer enhancement would affect the pollutants degradation pattern under varying salinity. The increase of NaCl salinity decreased ozone solubility and accelerated the futile consumption of ozone and hydroxyl radicals (•OH), and the maximum •OH concentration under 50 g/L salinity was only 23% of that without salinity. However, the increase of NaCl salinity also significantly reduced the ozone bubble size and enhanced the interphase and intraliquid mass transfer, with the volumetric mass transfer coefficient being 130% higher than that without salinity. The trade-off between reaction inhibition and mass transfer enhancement shifted under different pH values and aerator pore sizes, and the oxalate degradation pattern would change correspondingly. Besides, the trade-off was also identified for Na2SO4 salinity. These results emphasized the dual influence of salinity and offered a new theoretical perspective on the role of salinity in the HCO process.

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Section: Kinetic Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Revisit the Role of Salinity in Heterogeneous Catalytic Ozonation: The Trade-Off between Reaction Inhibition and Mass Transfer Enhancement

Ren

Yan

et al. 2023

Environ. Sci. Technol.

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“…During the activation process, CNTs/MC-nZVI provides electrons to facilitate the reduction of persulfate and generation of free radicals, thereby degrading organic pollutants. Zhifei Ma 50 and others synthesized modified mesoporous carbon with a core–shell structure (MCNZVI) using hydrothermal synthesis and high-temperature pyrolysis. The modified mesoporous carbon material improved the stability of nZVI and enhanced the contact and reaction between the catalyst and Reactive Black 5 (RB5).…”

Section: Advanced Oxidation System Of Nano Zero-valent Iron Activatio...mentioning

confidence: 99%

A review of recent studies on nano zero-valent iron activated persulfate advanced oxidation technology for the degradation of organic pollutants

Lei

Song

et al. 2023

New J. Chem.

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“…Thus far, many methods have been devised to activate persulfate, which have been extensively studied and identified with their pros and cons (Vakili et al, 2021). Compared with persulfate activation by alkali, transition metals and radiation, thermal activation and iron-/carbon-based activation are more environmentally friendly and cost-effective, being promising for field applications (Li et al, 2020;Ma et al, 2021). The detailed activation methods have been comprehensively reviewed very recently (Matzek and Carter, 2016;Pang et al, 2019;Zhi et al, 2020;Karim et al, 2021;Tan et al, 2021).…”

Section: Principles Of Paomentioning

confidence: 99%

Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO) for complete attenuation of organohalides

Wang

2021

Front. Environ. Sci. Eng.

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Due to the toxicity of bioaccumulative organohalides to human beings and ecosystems, a variety of biotic and abiotic remediation methods have been developed to remove organohalides from contaminated environments. Bioremediation employing organohalide-respiring bacteria (OHRB)-mediated microbial reductive dehalogenation (Bio-RD) represents a cost-effective and environmentally friendly approach to attenuate highly-halogenated organohalides, specifically organohalides in soil, sediment and other anoxic environments. Nonetheless, many factors severely restrict the implications of OHRB-based bioremediation, including incomplete dehalogenation, low abundance of OHRB and consequent low dechlorination activity. Recently, the development of in situ chemical oxidation (ISCO) based on sulfate radicals (SO 4 ·− ) via the persulfate activation and oxidation (PAO) process has attracted tremendous research interest for the remediation of lowly-halogenated organohalides due to its following advantages, e.g., complete attenuation, high reactivity and no selectivity to organohalides. Therefore, integration of OHRB-mediated Bio-RD and subsequent PAO (Bio-RD-PAO) may provide a promising solution to the remediation of organohalides. In this review, we first provide an overview of current progress in Bio-RD and PAO and compare their limitations and advantages. We then critically discuss the integration of Bio-RD and PAO (Bio-RD-PAO) for complete attenuation of organohalides and its prospects for future remediation applications. Overall, Bio-RD-PAO opens up opportunities for complete attenuation and consequent effective in situ remediation of persistent organohalide pollution.

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Preparation of nZVI embedded modified mesoporous carbon for catalytic persulfate to degradation of reactive black 5

Cited by 24 publications

References 36 publications

Revisit the Role of Salinity in Heterogeneous Catalytic Ozonation: The Trade-Off between Reaction Inhibition and Mass Transfer Enhancement

Revisit the Role of Salinity in Heterogeneous Catalytic Ozonation: The Trade-Off between Reaction Inhibition and Mass Transfer Enhancement

A review of recent studies on nano zero-valent iron activated persulfate advanced oxidation technology for the degradation of organic pollutants

Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO) for complete attenuation of organohalides

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