Photocatalytic Simultaneous Removal of Nitrite and Ammonia via a Zinc Ferrite/Activated Carbon Hybrid Catalyst under UV–Visible Irradiation

Jia, Yali; Liu, Shou-Qing; Liu, Wenxiao; Meng, Zhen; Luo, Li; Chen, Feng; Zhou, Jing

doi:10.1021/acsomega.8b00677

Cited by 40 publications

(13 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many researchers have attempted to modify the photocatalysts (particularly TiO 2 based) and investigate the influential experimental parameters to boost ammonia oxidation efficiency and N 2 selectivity. For instance, titania, as the most commonly studied and used photocatalyst due to its abundance, nontoxicity, chemical stability, and excellent UV-light activity, was specifically investigated by loading noble metals, − controlling solution pH and catalyst concentration, − and solid support immobilization. − In addition, some new visible light photocatalysts have also been developed for ammonia oxidation. − …”

Section: Photocatalytic Oxidation Of Ammoniamentioning

confidence: 99%

“…On the other hand, the selection of low band gap photocatalysts and selective adsorption of ammonia onto photocatalysts are also adopted. The Liu group has developed different hybrid photocatalysts such as low bandgap MoS 2 /N-doped graphene, MnO 2 /N-doped graphene and ZnFe 2 O 4 /active carbon, ZnFe 2 O 4 /RGO with molecular recognition functions. − It is proposed that ammonia can strongly complex with Zn 2+ ions, so the adsorption of ammonia onto the surface of ZnFe 2 O 4 could be markedly enhanced. Other visible light photocatalysts including Bi 2 Fe 4 O 9 , Bi 2 WO 6 , and CdS/TNT have also been reported for visible light induced oxidation of aqueous ammonia. − …”

Section: Photocatalytic Oxidation Of Ammoniamentioning

confidence: 99%

See 1 more Smart Citation

Recent Advances on Photocatalytic and Electrochemical Oxidation for Ammonia Treatment from Water/Wastewater

Zhang

Ruan

2020

ACS EST Eng.

View full text Add to dashboard Cite

Heterogeneous photocatalytic (PC) and electrochemical (EC) oxidation of ammonia/ammonium pollutants in water/wastewater have been thoroughly investigated for ammonia abatement from aqueous streams, as there are continuing needs for developing alternative on-site easily controllable treatment approaches in contrast to conventional methods. Depending on the contamination level, water matrix characters, and regulatory consideration, the PC and EC oxidation of wastewater pollutants or integration with other treatment processes exhibit their own advantages and disadvantages at specific conditions. The PC oxidation of ammonia primarily relies on in situ generated strong oxidants such as hydroxyl radicals and holes, but their reactivities with ammonia are relatively slower at environmentally relevant pH conditions. In contrast, indirect EC oxidation of ammonia based on active chlorine species is more efficient and exhibits some advantages compared to the chemical chlorination approach. Although we have gained much scientific knowledge on this research topic in recent years, the research so far has not yet lead to broad industry adoption due to the many concerns about technical drawbacks and economic feasibilities; hence, it is necessary to reexamine the efforts made in this field. Upon survey of the recent literature, the aim of this review is to summarize and discuss the recent achievements and key issues on the PC and EC driven oxidation processes for ammonia abatement in order to avoid redundant studies that concentrate on well-established issues and point out the research directions to move these techniques forward in future.

show abstract

Section: Photocatalytic Oxidation Of Ammoniamentioning

confidence: 99%

Section: Photocatalytic Oxidation Of Ammoniamentioning

confidence: 99%

Recent Advances on Photocatalytic and Electrochemical Oxidation for Ammonia Treatment from Water/Wastewater

Zhang

Ruan

2020

ACS EST Eng.

View full text Add to dashboard Cite

show abstract

“…Great efforts have been devoted to mitigating the risks associated with the dissolved inorganic nitrogen (DIN) in the forms of NO 2 − and ammonia by biological removal either through nitrification or denitrification processes [13,14]. Nevertheless, this biological method has some drawbacks, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the use of photo-induced processes (i.e. photolysis and photocatalysis) for the degradation of DIN has attracted great attention [13,20,21]. In these methods, the photo-induced degradation involves three routes: (1) the oxidation of ammonia to nitrite and/or nitrate [22], (2) the reduction of nitrite to nitrogen gas as a mimicking process for nitrification or denitrification process [12,23], and (3) the simultaneous removal of ammonia and nitrite ions [13].…”

Section: Introductionmentioning

confidence: 99%

Revisiting the mechanisms of nitrite ions and ammonia removal from aqueous solutions: photolysis versus photocatalysis

Mokhtar

Ahmed

Kandiel

2022

Photochem Photobiol Sci

View full text Add to dashboard Cite

Nitrite ions and ammonia are widespread forms of inorganic water pollutants. Nevertheless, the mechanisms of their photolytic and photocatalytic reactions under UV-A irradiation are still fully undisclosed, particularly, at different pH values under aerobic and inert atmospheres. Herein, we have studied the photolytic decomposition of nitrite ions under different conditions using 365 nm UV-A LED as a light source instead of mercury lamps that emit photons in the UV-B region and generate a lot of heat. The results indicated that the rate of nitrite disproportionation in the dark at pH ≤ 3.0 is remarkably high relative to the rate of the photolytic decomposition. At pH ˃ 3, the photolytic reaction is negligible and nitrite ions showed considerable stability. In contrast, the photocatalytic oxidation of nitrite ions over TiO 2 photocatalysts, namely, TiO 2 P25, TiO 2 UV100, and TiO 2 anatase/brookite mixture proceeds at pH ˃ 3.0. TiO 2 P25 exhibited the highest photocatalytic activity at pH 5. Interestingly, the photolytic simultaneous removal of nitrite ions and ammonia was possible at pH 9.0 in the absence of oxygen (Ar atmosphere). A 42.69 ± 0.66%, 27.75 ± 1.7%, and 32.74 ± 0.59% of nitrogen calculated based on nitrite, ammonia, and both of them, respectively, can be removed after 6 h of UV-A irradiation. The selectivity of N 2 evolution was 77.6%. The nitrogen removal rate was significantly reduced in the presence of TiO 2 photocatalyst evincing that TiO 2 photocatalysis is applicable for nitrite ions oxidation, whereas the photolytic process is better suited for the simultaneous removal of nitrite ions and ammonia.

show abstract

“…Zendehzaban et. al evaluated the photocatalytic removal of ammonia with the help of TiO2/Leca (Zendehzaban et al 2013 (Ye et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Ammonia with Titania Nanoparticles under UV Light Irradiation

Hashemi¹,

Sabbaghi²,

Saboori³

et al. 2021

Preprint

View full text Add to dashboard Cite

Ammonia is one of the most significant contaminants of water resources which make perilous and dire environmental detriment for human life. In this investigation, the photocatalytic degradation of ammonia from an aqueous solution was evaluated with the help of titania nanoparticles. Titania nanoparticles (NPs) were synthesized by sol-gel procedure and also the surface morphology and chemical structure of them was carried out by XRD(X-ray powder diffraction), FTIR(Fourier transform infrared), DLS(Dynamic light scattering), EDX( Energy-dispersive X-ray spectroscopy), FE-SEM(field emission scanning electron microscope), and TEM(Transmission electron microscope) analyses. To elaborate the effect of some parameters including pH, initial concentration of pollutant, catalyst dosage and contact time, Design Expert Software (I optimal technique) was employed. Results demonstrated that titania NPs have a high photocatalytic activity for ammonia removal. Moreover, the pH parameter had the greatest effect on the degradation performance. The optimum amounts of NPs concentration, initial concentration of contaminant, contact time and pH obtained 0.3 g/l, 1500 mg/l, 120 min and 12. NPs were used four times and results showed that the removal efficiency of the NPs decrease from 96.96 % to 65%.

show abstract

Photocatalytic Simultaneous Removal of Nitrite and Ammonia via a Zinc Ferrite/Activated Carbon Hybrid Catalyst under UV–Visible Irradiation

Cited by 40 publications

References 59 publications

Recent Advances on Photocatalytic and Electrochemical Oxidation for Ammonia Treatment from Water/Wastewater

Recent Advances on Photocatalytic and Electrochemical Oxidation for Ammonia Treatment from Water/Wastewater

Revisiting the mechanisms of nitrite ions and ammonia removal from aqueous solutions: photolysis versus photocatalysis

Photocatalytic Degradation of Ammonia with Titania Nanoparticles under UV Light Irradiation

Contact Info

Product

Resources

About