Role of Fe/pumice composition and structure in promoting ozonation reactions

Yuan, Liangjie; Shen, Jimin; Chen, Zhonglin; Guan, Xiaohong

doi:10.1016/j.apcatb.2015.07.016

Cited by 81 publications

(21 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As a consequence of ozone decomposition the reactive oxidative species will be generated in the medium and hence the PhP degradation will be increased. The higher dissolved ozone concentration in the presence of Fe-based natural catalysts was also reported in previous works 12 , 42 . The release of inorganic ions (NO 3 − and NO 2 − ) from N heteroatoms as a consequence of PhP bond cleavage in sole and catalytic ozonation is presented in Fig.…”

Section: Resultssupporting

confidence: 86%

High performance ozone based advanced oxidation processes catalyzed with novel argon plasma treated iron oxyhydroxide hydrate for phenazopyridine degradation

Pelalak

Heidari

Forouzesh

et al. 2021

Sci Rep

View full text Add to dashboard Cite

The present study has focused on the degradation of phenazopyridine (PhP) as an emerging contaminant through catalytic ozonation by novel plasma treated natural limonite (FeOOH·xH2O, NL) under argon atmosphere (PTL/Ar). The physical and chemical characteristics of samples were evaluated with different analyses. The obtained results demonstrated higher surface area for PTL/Ar and negligible change in crystal structure, compared to NL. It was found that the synergistic effect between ozone and PTL/Ar nanocatalyst was led to highest PhP degradation efficiency. The kinetic study confirmed the pseudo-first-order reaction for the PhP degradation processes included adsorption, peroxone and ozonation, catalytic ozonation with NL and PTL/Ar. Long term application (6 cycles) confirmed the high stability of the PTL/Ar. Moreover, different organic and inorganic salts as well as the dissolved ozone concentration demonstrated the predominant role of hydroxyl radicals and superoxide radicals in PhP degradation by catalytic Ozonation using PTL/Ar. The main produced intermediates during PhP oxidation by PTL/Ar catalytic ozonation were identified using LC–(+ESI)–MS technique. Finally, the negligible iron leaching, higher mineralization rate, lower electrical energy consumption and excellent catalytic activity of PTL/Ar samples demonstrate the superior application of non-thermal plasma for treatment of NL.

show abstract

Section: Resultssupporting

confidence: 86%

High performance ozone based advanced oxidation processes catalyzed with novel argon plasma treated iron oxyhydroxide hydrate for phenazopyridine degradation

Pelalak

Heidari

Forouzesh

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Extensive studies have reported that the density of surface hydroxyl groups on the metal-based catalysts was positively correlated with the catalytic activity, − and the surface hydroxyl groups are widely mentioned as the catalytic active sites after simply excluding other factors. Phosphate was usually adopted to assist in confirming the catalytic active sites of surface hydroxyl groups because as a stronger Lewis base than water, it could substitute for the surface hydroxyl groups on catalysts, decrease the amount of surface hydroxyl groups, and finally impede the activation process of ozone to radicals ,,, as well as act as a scavenger of • OH . Yuan et al found that in the Fe/pumice HCO of p-chloronitrobenzene (p-CNB), surface hydroxyl groups on metal oxides of pumice and Fe/pumice could act as catalytic active sites for O 3 decomposition to produce • OH through phosphate addition .…”

Section: Catalytic Active Sites For Radical-based Oxidationsmentioning

confidence: 99%

Reactive Oxygen Species and Catalytic Active Sites in Heterogeneous Catalytic Ozonation for Water Purification

Wang

Cao

et al. 2020

Environ. Sci. Technol.

370

127

View full text Add to dashboard Cite

Heterogeneous catalytic ozonation (HCO) processes have been widely studied for water purification. The reaction mechanisms of these processes are very complicated because of the simultaneous involvement of gas, solid, and liquid phases. Although typical reaction mechanisms have been established for HCO, some of them are only appropriate for specific systems. The divergence and deficiency in mechanisms hinders the development of novel active catalysts. This critical review compares the various existing mechanisms and categorizes the catalytic oxidation of HCO into radical-based oxidation and nonradical oxidation processes with an in-depth discussion. The catalytic active sites and adsorption behaviors of O 3 molecules on the catalyst surface are regarded as the key clues for further elucidating the O 3 activation processes, evolution of reactive oxygen species (ROS) or organic oxidation pathways. Moreover, the detection methods of the ROS produced in both types of oxidations and their roles in the destruction of organics are reviewed with discussion of some specific problems among them, including the scavengers selection, experiment results analysis as well as some questionable conclusions. Finally, alternative strategies for the systematic investigation of the HCO mechanism and the prospects for future studies are envisaged.

show abstract

“…Yuan et al [ 171 ] also tested a modified pumice, Fe/pumice, as a catalyst in the ozonation of p -chloronitrobenzene ( p -CNB). The catalyst was prepared by impregnation with Fe(NO 3 ) 3 and NaOH, then washed until constant pH and dried at 60 °C for 12 h. XRF analysis revealed a composition of O (45.8%), Si (20.5%), Fe (13.8%), Al (7.6%), Ca (4.5%), Na (3.0%), Mg (1.3%) and K (1.6%).…”

Section: Natural Mineral Catalystsmentioning

confidence: 99%

Clay, Zeolite and Oxide Minerals: Natural Catalytic Materials for the Ozonation of Organic Pollutants

Inchaurrondo

Font

2022

Molecules

View full text Add to dashboard Cite

Ozone has been successfully employed in water treatment due to its ability to oxidize a wide variety of refractory compounds. In order to increase the process efficiency and optimize its economy, the implementation of heterogeneous catalysts has been encouraged. In this context, the use of cheap and widely available natural materials is a promising option that would promote the utilization of ozone in a cost-effective water treatment process. This review describes the use of natural clays, zeolites and oxides as supports or active catalysts in the ozonation process, with emphasis on the structural characteristics and modifications performed in the raw natural materials; the catalytic oxidation mechanism; effect of the operating parameters and degradation efficiency outcomes. According to the information compiled, more research in realistic scenarios is needed (i.e., real wastewater matrix or continuous operation in pilot scale) in order to transfer this technology to the treatment of real wastewater streams.

show abstract

Role of Fe/pumice composition and structure in promoting ozonation reactions

Cited by 81 publications

References 45 publications

High performance ozone based advanced oxidation processes catalyzed with novel argon plasma treated iron oxyhydroxide hydrate for phenazopyridine degradation

High performance ozone based advanced oxidation processes catalyzed with novel argon plasma treated iron oxyhydroxide hydrate for phenazopyridine degradation

Reactive Oxygen Species and Catalytic Active Sites in Heterogeneous Catalytic Ozonation for Water Purification

Clay, Zeolite and Oxide Minerals: Natural Catalytic Materials for the Ozonation of Organic Pollutants

Contact Info

Product

Resources

About