Catalytic Effect of Several Iron Species on Ozonation

Kishimoto, Naoyuki; Ueno, Shouhei

doi:10.2965/jwet.2012.205

Cited by 14 publications

(4 citation statements)

References 22 publications

(23 reference statements)

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“…This may be related to the fact that the oxidation of Fe 2+ into Fe 3+ generated precipitates that decrease the catalytic effect of this metal (see Figure 3). This result agrees with Kishimoto and Ueno [67] study, which Fe 2+ appears to be associated with no significant effect in the second stage of ozonation due to the formation of precipitates throughout the treatment.…”

Section: Comparison Of Oxidation Efficiency: Determination Of R Oh O3supporting

confidence: 92%

Catalytic ozonation by metal ions for municipal wastewater disinfection and simulataneous micropollutants removal

Malvestiti

Cruz-Alcalde

López-Vinent

et al. 2019

Applied Catalysis B: Environmental

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This work evaluated the effects of Fe 2+ , Co 2+ and Al 3+ in municipal wastewater disinfection through E.coli and Pseudomonas spp inactivation along with cellular adenosine triphosphate (ATP) depletion. Simultaneously, the effect of catalytic ozonation of secondary effluent on the removal of selected micropollutants with different ozone kinetics (acetamiprid, dichlorvos and atrazine) was evaluated. E.coli and Pseudomonas spp inactivation increased almost 20% with 1 mgL -1 Fe 2+ , Co 2+ , Al 3+ and 40% with 10 mgL -1 Fe 2+ compared with single ozonation. The bacteria reactivation after the treatments showed that Fe 2+ was the most effective metal ion on inhibiting regrowth. The cellular ATP followed the same trend as the indicators microorganisms inactivation, with significant reduction of ATP over the treatment compared to single ozonation. Finally, the HO • exposure per consumed ozone ratio was applied for single ozonation, Fe 2+ /O 3 , Co 2+ /O 3 and Al 3+ /O 3 processes to evaluate and compare the contribution of radical pathway on micropollutants abatement.

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Section: Comparison Of Oxidation Efficiency: Determination Of R Oh O3supporting

confidence: 92%

Catalytic ozonation by metal ions for municipal wastewater disinfection and simulataneous micropollutants removal

Malvestiti

Cruz-Alcalde

López-Vinent

et al. 2019

Applied Catalysis B: Environmental

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“…The presence of hydroxyl ion (OH − ) is precisely what makes this type of reaction strongly dependent on the pH. [ 26,29 ] The mechanism of self‐decomposition of the O 3 can be expressed as [ 30,31 ]

{normalO}_{3} + O {normalH}^{-} \to + {normalO}_{2} + {normalHO}_{2}^{-}

{normalO}_{3} + {normalHO}_{2}^{-} \to {normalO}_{3}^{- •} + {normalHO}_{2}^{•}

{normalHO}_{2}^{•} \leftrightarrow {normalH}^{+} + {normalO}_{2}^{- •}

{normalO}_{3} + {normalO}_{2}^{- •} \to {normalO}_{3}^{- •} + {normalO}_{2}

{normalO}_{3}^{- •} + {normalH}_{2} O \to {normalO}_{2} + O {normalH}^{•} + O {normalH}^{-}

In addition, under basic conditions, the decomposition of O 3 by the catalyst, with the consequent generation of hydroxyl, occurred in both cases.…”

Section: Resultsmentioning

confidence: 99%

Homogeneous Catalytic Ozonation of Lipids Involving Fe²⁺ and Mn²⁺: An Experimental and Modeling Study

Ramos

Biz

Tavares

et al. 2020

CLEAN Soil Air Water

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Given the issue of lipids in effluent treatment systems and their negative impact on the environment, this study aimed to examine lipid degradation by homogenous catalytic ozonation with the aid of iron and manganese ions. This technology presents the possibility of completely mineralizing pollutants using hydroxyl radicals. Milk is chosen as the lipid source because of the high concentration of triglycerides in its matrix, this kind of lipid being the one found most frequently in food and, consequently, in effluent treatment systems. The milk pH value is controlled, and acidic, neutral, and basic conditions are evaluated. The rates of pseudo-first-order reactions and the effective value are estimated. It is shown that under acidic conditions low catalyst dosages are enough to cause the complete degradation of lipids. Under neutral conditions, a similar behavior is observed. Under basic conditions, higher catalyst dosages give higher reaction rates. The order of effectiveness of the catalysts under acidic and basic conditions is Fe 2+ > Mn 2+ , with Mn 2+ > Fe 2+ under neutral conditions. Homogeneous catalytic ozonation is therefore efficient at lipid degradation. This technique is viable economically, since the lipid removal occurred at low ozone levels. In addition, the ions used as catalysts are naturally abundant.

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“…These results proved that MBC enhanced P4R removal by O 3 . The suggested mechanisms for ozonation accelerated by Fe-based crystals in MBC (MBC-Fe) are as follows (Kishimoto et al, 2012;Ji et al, 2018;Yu et al, 2019): The effect of pH on the ozonation of P4R with MBC is presented in Figure 8. In the adsorption step, the adsorption capacities of MBC at pH 3.0, 5.8, 8.0, and 10.0 were 20, 17, 14, and 13 mg/g, respectively.…”

Section: Ozonation Of Ponceau 4r Catalyzed By Mbcmentioning

confidence: 99%

Catalytic Ozonation of Ponceau 4R Using Multifunctional Magnetic Biochar Prepared from Rubber Seed Shell

Nguyen,

Truong,

Nguyen

et al. 2023

J. Ecol. Eng.

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Herein, abundant and underutilized rubber seed shell (RSS) was valorized for one-pot production of multifunctional magnetic biochar (MBC) through one-pot FeCl 3 activation. Fe 3 O 4 and Fe 0 crystals were formed in MBC, providing a saturation magnetization of 6.83 emu/g. In addition, the material had a specific surface area of 378 m 2 /g and a total pore volume of 0.22 cm 3 /g. MBC was subsequently explored for catalytic ozonation of Ponceau 4R (P4R). As a result, MBC enhanced P4R ozonation in a broad pH range of 3.0-9.0. At pH 5.8, the pseudo-first-order rate constant of P4R decolorization with MBC improved by 50% compared to that without MBC. Summarily, RSSderived MBC is a potential catalyst for enhanced ozonation of Ponceau 4R thanks to its low cost, eco-friendliness, relative effectiveness, and magnetic separability.

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Catalytic Effect of Several Iron Species on Ozonation

Abstract: Catalytic degradation of 1,4-dioxane in a synthetic wastewater by ozonation with several iron species was investigated. Iron species discussed were zero-valent iron (Fe), ferrous ion (Fe 2+

Cited by 14 publications

References 22 publications

Catalytic ozonation by metal ions for municipal wastewater disinfection and simulataneous micropollutants removal

Catalytic ozonation by metal ions for municipal wastewater disinfection and simulataneous micropollutants removal

Homogeneous Catalytic Ozonation of Lipids Involving Fe²⁺ and Mn²⁺: An Experimental and Modeling Study

Catalytic Ozonation of Ponceau 4R Using Multifunctional Magnetic Biochar Prepared from Rubber Seed Shell

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Catalytic Effect of Several Iron Species on Ozonation

Abstract: Catalytic degradation of 1,4-dioxane in a synthetic wastewater by ozonation with several iron species was investigated. Iron species discussed were zero-valent iron (Fe), ferrous ion (Fe 2+

Cited by 14 publications

References 22 publications

Catalytic ozonation by metal ions for municipal wastewater disinfection and simulataneous micropollutants removal

Catalytic ozonation by metal ions for municipal wastewater disinfection and simulataneous micropollutants removal

Homogeneous Catalytic Ozonation of Lipids Involving Fe2+ and Mn2+: An Experimental and Modeling Study

Catalytic Ozonation of Ponceau 4R Using Multifunctional Magnetic Biochar Prepared from Rubber Seed Shell

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Homogeneous Catalytic Ozonation of Lipids Involving Fe²⁺ and Mn²⁺: An Experimental and Modeling Study