Catalytic reduction of nitrate in water over alumina-supported nickel catalyst toward purification of polluted groundwater

Kobune, Marina; Takizawa, Dai; Nojima, Jun; Otomo, Ryoichi; Kamiya, Yuichi

doi:10.1016/j.cattod.2020.01.037

Cited by 10 publications

(2 citation statements)

References 42 publications

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“…Various methods for purification of water containing NO 3 − have been extensively studied. For example, ion exchange, [3–5] reverse osmosis, [6,7] electrochemical reduction, [8–11] capacitive deionization, [12] catalytic and photocatalytic reduction, [13–19] biological treatment, [20–24] and adsorptive uptake [25–45] are well‐known techniques for the aqueous NO 3 − removal. Among these, adsorption is an industrially promising technique owing to its low cost, simple operation, and low energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Nitrate Uptake from Water Using Amine‐Functionalized Meso‐ and Macroporous Carbons

Namesawa,

Hamada,

Shimoda

et al. 2024

ChemistrySelect

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Meso‐ and macroporous carbon materials modified with protonated amino groups (−NH3+Cl−) for aqueous nitrate (NO3−) uptake were prepared by surface functionalization with aminopropylsilane. Although the silane coupling treatment decreased the specific surface area of the carbons, surface modification with the −NH3+Cl− group improved the NO3− uptake capacity of both meso‐ and macroporous carbons. The amount of NO3− adsorbed depends on the specific surface area of the adsorbent; an adsorbent with a larger specific surface area exhibits a larger uptake capacity. Enhanced NO3− adsorption onto the NH3+Cl−‐modified surface occurred through an ion‐exchange mechanism. Changes in the pH of the sample solutions before and after NO3− uptake revealed the competitive exchange of NO3− and OH−. NO3− uptake is inhibited by the coexistence of anions other than NO3− (excess Cl−, SO42−, CO32− and HCO3−) and/or OH− at high pH. In particular, the influence of excess Cl− reveals that NO3− uptake through ion exchange is not irreversible, and the adsorption capacity is determined based on the ion exchange equilibrium.

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Section: Introductionmentioning

confidence: 99%

Nitrate Uptake from Water Using Amine‐Functionalized Meso‐ and Macroporous Carbons

Namesawa,

Hamada,

Shimoda

et al. 2024

ChemistrySelect

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“…Different inert supports such as Al 2 O 3 , SiO 2 , and activated carbon have been used in the catalytic elimination of NO 3 – from water. , In addition, these inert supports have been combined with redox supports, such as ZrO 2 and CeO 2 . , In the same way, the active phase used usually contains a precious metal (Pd, Pt, Rh, and Ru) promoted with a second metal (Cu, Ni, Mo, Co, and Sn). , The best catalytic results were found using the PdCu active phase. , …”

Section: Introductionmentioning

confidence: 99%

Development of PdCu Structured Catalysts Based on ZrO₂–CeO₂ Materials Supported on Cordierite Monoliths for Water Remediation: Removal of Hazardous Oxyanions

Peroni

Navas

Bideberripe

et al. 2021

Ind. Eng. Chem. Res.

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The elimination of hazardous oxyanions NO 3 − , NO 2 − , and BrO 3 − from synthetic and real water samples using novel PdCu/10ZrCe (10 wt % ZrO 2 on CeO 2 ) structured catalysts supported on cordierite monoliths was studied in order to avoid loss of the catalytic material during water treatment. The monoliths were coated with different suspensions of the 10ZrCe support. Particle sizes, suspension concentration of 10ZrCe, and pH effects were evaluated. The structured catalyst was tested in a fixed-bed reactor at different flow rates for the elimination of the selected anions. Good results in terms of activity and selectivity to the products of interest (S N 2 : 0.99 and S Br − :1) were obtained in synthetic water. The structured catalyst was reused three times, maintaining its activity and selectivity. It was evaluated in a real water sample but the activity was lower probably due to competition for active sites by different ions present in the sample. The structured catalyst prepared is promising for the development of a system for water remediation, based on PdCu/ZrO 2 −CeO 2 materials.

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Nitrite Removal from Water: New Support Materials for Pd-Based Catalysts Aiming for a Low Ammonium Production

Zoppas,

Sacco,

Aghemo

et al. 2024

Advances in Catalysts Research

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Catalytic reduction of nitrate in water over alumina-supported nickel catalyst toward purification of polluted groundwater

Cited by 10 publications

References 42 publications

Nitrate Uptake from Water Using Amine‐Functionalized Meso‐ and Macroporous Carbons

Nitrate Uptake from Water Using Amine‐Functionalized Meso‐ and Macroporous Carbons

Development of PdCu Structured Catalysts Based on ZrO₂–CeO₂ Materials Supported on Cordierite Monoliths for Water Remediation: Removal of Hazardous Oxyanions

Nitrite Removal from Water: New Support Materials for Pd-Based Catalysts Aiming for a Low Ammonium Production

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Catalytic reduction of nitrate in water over alumina-supported nickel catalyst toward purification of polluted groundwater

Cited by 10 publications

References 42 publications

Nitrate Uptake from Water Using Amine‐Functionalized Meso‐ and Macroporous Carbons

Nitrate Uptake from Water Using Amine‐Functionalized Meso‐ and Macroporous Carbons

Development of PdCu Structured Catalysts Based on ZrO2–CeO2 Materials Supported on Cordierite Monoliths for Water Remediation: Removal of Hazardous Oxyanions

Nitrite Removal from Water: New Support Materials for Pd-Based Catalysts Aiming for a Low Ammonium Production

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Development of PdCu Structured Catalysts Based on ZrO₂–CeO₂ Materials Supported on Cordierite Monoliths for Water Remediation: Removal of Hazardous Oxyanions