Catalytic oxidation of ammonium ion in water with ozone over metal oxide catalysts

Ichikawa, Shota; Mahardiani, Lina; Kamiya, Yuichi

doi:10.1016/j.cattod.2013.09.039

Cited by 62 publications

(32 citation statements)

References 25 publications

(33 reference statements)

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“…Rare earth oxides (Faria et al 2009;Dai et al 2014), transition metal oxides (Ichikawa et al 2014;Turkay et al 2014), carbon materials Saleh and Gupta 2014;Wang 2015) and molecular sieve (Li et al 2014) are frequently used as catalysts. Among them, carbon-based materials, especially multi-walled carbon nanotubes (MWCNTs), have received increasing attention owing to its excellent characteristics, for example, (1) the high mesoporous area is favorable to the fluidity and mass transfer of reactants on catalyst surface; (2) the functional groups on MWCNTs surface are beneficial to their dispersion in water; (3) the resistance to abrasion and acidic/basic environments makes them suitable for intense oxidation circumstances, MWCNTs have been widely used as catalyst or catalyst support in wastewater treatment Gupta 2011, 2012b;Zhang et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Fe3O4/multi-walled carbon nanotubes as an efficient catalyst for catalytic ozonation of p-hydroxybenzoic acid

Bai

Yang

Wang

2015

Int. J. Environ. Sci. Technol.

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Fe 3 O 4 /multi-walled carbon nanotubes were prepared, characterized and used as a nanocatalyst for ozonation of p-hydroxybenzoic acid. The stability and reusability of the catalyst was evaluated. Characterization techniques including X-ray diffraction, Fourier transform infrared absorption spectroscopy, scanning electron microscope, high-resolution transmission electron microscopy and physical property measurement were used to analyze the reason for the decrease in catalyst activity. The addition of t-butanol and bicarbonate were used to explore the different process between hydroxyl radicals and ozone. The experimental results showed that the catalytic ozonation could significantly increase the degradation and mineralization of p-hydroxybenzoic acid. The initial pH value was a crucial factor influencing ozone decomposition and the surface property of catalyst or organic pollutant. The degradation of p-hydroxybenzoic acid increased by 32 % in catalyzed ozonation compared to single ozonation after 5 min reaction with unadjusted pH (about 5.4). In batch experiments, the removal efficiency of p-hydroxybenzoic acid and total organic carbon decreased 36.1 and 6.8 % after six run times. Bicarbonate significantly inhibited the mineralization of p-HBA, but it had almost no influence on the catalytic degradation of p-hydroxybenzoic acid. A possible pathway for p-hydroxybenzoic acid degradation was tentatively proposed.

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Section: Introductionmentioning

confidence: 99%

Fe3O4/multi-walled carbon nanotubes as an efficient catalyst for catalytic ozonation of p-hydroxybenzoic acid

Bai

Yang

Wang

2015

Int. J. Environ. Sci. Technol.

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“…Heterogeneous catalyst that usually applied for catalytic ozonation is metal oxide and cobalt oxide is one of them [9,[11][12][13].…”

Section: Pengaruh Suhu Kalsinasi Pada Cobalt Oksida Dan Kinerjanya Untukmentioning

confidence: 99%

“…However, mostly Co3O4 and CoO are used due to their stability [18,20]. These cobalt oxides were synthesized using various methods such as hydrothermal [21], precipitation [22][23][24], impregnation [13], femtosecond laser ablation [16], solid-state [14] and core-shell [15].…”

Section: Pengaruh Suhu Kalsinasi Pada Cobalt Oksida Dan Kinerjanya Untukmentioning

confidence: 99%

The Effect of Calcination Temperature on Cobalt Oxide Species and Performance for Catalytic Ozonation of NH4+ in Water

Mahardiani

2019

JKPK

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Cobalt oxide catalysts can be prepared by impregnation and calcined under different temperature to obtained different species of cobalt oxide, namely CoO(OH), Co3O4, and CoO. Co3O4 was the most appropriate catalyst for decomposing NH4+ with O3 in the presence of Cl– because of relatively high activity, 74%, and high selectivity for gas products, 88%, compared to CoO and CoO(OH). Cl– is necessary to proceed the catalytic ozonation of NH4+ since Cl– participate in the catalytic ozonation mechanism, while SO42– inhibited the process. During the catalytic ozonation of NH4+, Co3O4 showed no deactivation rather than enhanced the catalytic performance after repeated used up to 100% of NH4+ conversion. The Co3O4 can be regenerated by recalcining the catalyst under air at high temperature.

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“…Ichikawa et al [12] studied a series of metal oxides catalysts’ (Fe 2 O 3 , CuO, Mn 3 O 4 , MgO, NiO, SnO 2 , Al 2 O 3 , Co 3 O 4 , ZnO) catalytic ozonation oxidation NH 4 + at 60 °C and without pH control of the solution. It was confirmed that MgO and NiO have the highest activity but low selectivity to gaseous products, while Co 3 O 4 has high selectivity to gaseous products but was slightly less active.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, in presence of ozone, these transition metal oxides as catalysts have the ability to degrade NH 4 + in water. However, according to the previously mentioned [12], it is usually necessary to provide stronger reaction conditions (high temperature) due to the weak interaction between metal oxides and ozone.

\equiv Me - OH + {normalO}_{3} \to \equiv Me + {normalO}_{2}^{-} \cdot + {HO}_{2}

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

{normalO}_{3}^{-} \cdot + {normalH}^{+} \to {HO}_{3}

{HO}_{3} \cdot \to \cdot OH + {normalO}_{2}

…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Surfactant-Enhanced Metal Oxides Catalyst for Catalytic Ozonation Ammonia in Water

Chen

Lin

2018

IJERPH

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The new surfactant-enhanced metal oxides composite catalysts have been prepared using solid state method and characterized by the N2-adsorption-desorption, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscope (TEM), and X-ray diffraction (XRD) techniques. Catalytic activity of the synthesized powders has been investigated in the liquid-phase catalytic ozonation ammonia nitrogen (NH4+) (50 mg/L). Especially, the effect of parameters such as optimum molar ratio for metal salt, NaOH and surfactants, temperature, and time of calcinations was also considered. Leveraging both high catalytic activity in NH4+ degradation and more harmless selectivity for gaseous nitrogen, the CTAB/NiO catalyst is the best among 24 tested catalysts, which was generated by calcining NiCl2·6H2O, NaOH, and CTAB under the molar ratio 1:2.1:0.155 at 300 °C for 2 h. With CTAB/NiO, NH4+ removal rate was 95.93% and gaseous nitrogen selectivity was 80.98%, under the conditions of a pH of 9, ozone flow of 12 mg/min, dosage of catalyst 1.0 g/L, reaction time 120 min, and magnetic stirring speed 600 r/min in room temperature.

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Catalytic oxidation of ammonium ion in water with ozone over metal oxide catalysts

Abstract: Abstract3

Cited by 62 publications

References 25 publications

Fe3O4/multi-walled carbon nanotubes as an efficient catalyst for catalytic ozonation of p-hydroxybenzoic acid

Fe3O4/multi-walled carbon nanotubes as an efficient catalyst for catalytic ozonation of p-hydroxybenzoic acid

The Effect of Calcination Temperature on Cobalt Oxide Species and Performance for Catalytic Ozonation of NH4+ in Water

Fabrication of Surfactant-Enhanced Metal Oxides Catalyst for Catalytic Ozonation Ammonia in Water

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