Separation and recovery of ammonium from industrial wastewater containing methanol using copper hexacyanoferrate (CuHCF) electrodes

Gao, Rui; Bonin, Luiza; Carvajal-Arroyo, José M.; Logan, Bruce E.; Rabaey, Korneel

doi:10.1016/j.watres.2020.116532

Cited by 16 publications

(10 citation statements)

References 25 publications

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“…+ removal efficiencies, up to 93%, were reported by Gao et al 62 when CuHCF electrodes were used for the treatment of industrial wastewater containing also methanol. The energy input in this case was 0.40 ± 0.01 kWh kg −1 NH 4 + .…”

Section: Electrochemical Inorganics and Organics Separation: State Of...mentioning

confidence: 79%

“…The method has been investigated for the recycling of batteries, 59 of printed circuit boards 60 and of automobile shredder residues (ASRs) 61 where not just organometallic complexes are present but also different metals. Gao et al 62 introduced an integrated metal recovery system combining leaching of metals from the target ASR waste using an (NH 4 ) 2 CO 3 lixiviant, recovered within the treatment to selectively recover metallic copper and zinc carbonate. A three-step integrated process was followed: i) electrodeposition, then ii) ammonia stripping and finally, iii) crystallization.…”

Section: Electrochemical Inorganics and Organics Separation: State Of...mentioning

confidence: 99%

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Review—Electrochemical Separation of Organic and Inorganic Contaminants in Wastewater

Gao

Mosquera-Romero

Ntagia

et al. 2022

J. Electrochem. Soc.

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High energy input and chemical additions are typically needed to deal with persistent pollutants, organic and inorganic, and organometallic complexes in wastewater. Particularly, organometallic complexes decrease the removal efficiency for other pollutants being treated with conventional technologies, which can lead to high operational costs and residues formation. The improperly treated wastewater contains nutrients (nitrogen and phosphorus), heavy metals, and persistent organics, which should be removed or recovered before discharging. Electrochemical technologies can achieve concomitant removal of persistent pollutants and resource recovery from wastewater, with the benefits of low chemical input, cost-effectiveness and reduced water consumption. Here, we provide an overview of electrochemical technologies for the separation of organics and inorganics and their subsequent recovery. The focus is placed into electrodeposition, electrodialysis, membrane electrolysis, electrochemical oxidation, capacitive deionization, and bioelectrochemical systems. The main challenges considered at present are i) the cost and longevity of the materials, ii) the process efficiency and selectivity and iii) the complexity of the wastewater matrices. In this review it is projected that in the near future, the electrochemical separation and recovery of organics and inorganics will be preferred, as electrochemical cells powered by renewable energy can serve for decentralized and off-grid treatment approaches.

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Section: Electrochemical Inorganics and Organics Separation: State Of...mentioning

confidence: 79%

Section: Electrochemical Inorganics and Organics Separation: State Of...mentioning

confidence: 99%

Review—Electrochemical Separation of Organic and Inorganic Contaminants in Wastewater

Gao

Mosquera-Romero

Ntagia

et al. 2022

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

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“…Several electrochemical approaches have shown to induce pH changes using proton/oxygen reduction reactions, water dissociation occurring at the bipolar membrane interface, and proton-mediated redox couple, enabling the conversion of ammonium into gaseous ammonia (NH 4 + + OH – → NH 3 + H 2 O) for its selective recovery combined with stripping processes. − Although the solution pH can be elevated without chemical inputs, associated electrochemical reactions and materials are energy and cost prohibitive or remain in its infancy. Instead of increasing the solution pH, the use of a cubic framework of Prussian blue analogues (PBAs), such as copper or nickel hexacyanoferrate (CuHCF or NiHCF), has shown to selectively recover NH 4 + from wastewater. − The center of the cubic framework can be occupied by cations [e.g., NH 4 + ≈ K + (1.25 Å); Na + (1.84 Å); Li + (2.38 Å)] upon electrochemical reactions, where the preference is given to those smaller than the average radius of the channel (1.6 Å) . However, limited ion-storage capacity necessitates frequent electrochemical intercalation/deintercalation cycles, which require multiple units with large footprints or complex operating procedures.…”

Section: Introductionmentioning

confidence: 99%

Selective Separation of Ammonium from Wastewater Using Ion Conducting Channels of a Prussian Blue Analogue

Chen,

Akinyemi,

Kim

2024

Environ. Sci. Technol. Lett.

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Wastewater treatment plants represent a centralized collection point of various resources, including ammonium, that could be recovered for the production of nitrogen fertilizer. Here, we show the use of copper hexacyanoferrates (CuHCFs) as ionconducting channels for the selective recovery of ammonium from wastewater. This model Prussian blue analogue was deposited at the surface of a cation exchange membrane (CEM) by a simple layer-by-layer precipitation method. The resulting CuHCF-CEM showed a selectivity of 5.0 ± 0.4 for NH 4 + relative to Na + using a binary mixture of synthetic wastewater (5 mM NH 4 Cl, 20 mM NaCl, 0.17 mA cm −2 ), which was nearly 5 times greater than the bare CEM. The improved selectivity was attributed to the CuHCF layer wherein NH 4 + could be migrated faster as well as more favorably occupied relative to Na + . The selectivity of CuHCF-CEM for NH 4 + was maintained relatively high compared with that of CEM in the presence of competing cations in a real domestic wastewater sample. This proof-of-concept study shows that selective ion-conducting channels of CuHCFs can provide a means to ammonia recovery from wastewater in electro-driven membrane processes.

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“…Ammonia (NH 3 ) is an indispensable substance in human existence and the development of modern industry and agriculture. , It is estimated that approximately 150 million metric tonnes of ammonia are synthesized globally, with a projected annual increase of 2.3% . Unfortunately, ammonia synthesis is a high-energy-consumption industry, which consumes more than 1% of electricity and 2–5% of the global fossil fuels and is responsible for 3% of the global carbon dioxide emission annually. − Besides the synthesis issue, the removal of ammonia as a toxic pollutant from the environment also results in heavy energy consumption and carbon footprint. , Ammonia widely exists in the form of ammonium in industrial wastewater, , landfill leachate, livestock wastewater, , human urine, − and so on. It requires a lot of effort for ammonium removal from wastewater by converting ammonium into nitrogen and then discharging nitrogen into the atmosphere (e.g., by biological processes), which is indeed a waste of nitrogen sources. , Therefore, it is quite promising for sustainable development to recycle ammonium as a precious resource from wastewater …”

Section: Introductionmentioning

confidence: 99%

“…4−7 Besides the synthesis issue, the removal of ammonia as a toxic pollutant from the environment also results in heavy energy consumption and carbon footprint. 8,9 Ammonia widely exists in the form of ammonium in industrial wastewater, 10,11 landfill leachate, 12 livestock wastewater, 13,14 human urine, 15−17 and so on. It requires a lot of effort for ammonium removal from wastewater by converting ammonium into nitrogen and then discharging nitrogen into the atmosphere (e.g., by biological processes), which is indeed a waste of nitrogen sources.…”

Section: Introductionmentioning

confidence: 99%

Armor-Structured Interconnected-Porous Membranes for Corrosion-Resistant and Highly Permeable Waste Ammonium Resource Recycling

Liu

Zhong

et al. 2022

Environ. Sci. Technol.

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Ammonium recovery from wastewater by gas-permeable membranes is promising but suffers from the tradeoff between membrane stability and permeability under harsh operating conditions. Chemical-resistant membranes display modest permeability due to the poor solubility and processibility; chemically active membranes are easier to be endowed with better permeability however hinder by instability. To resolve such a problem, we cleverly design a novel membrane configuration via one-step solution-electrospinning, with the chemical-active component (low-strength fluorine polymer) as the inner skeleton to construct interconnected porous structures and the chemical-resistant component (high-strength fluorine polymer) as the outer armor to serve as a protective layer. Due to the significantly enhanced mass transfer coefficient, the interconnected-porous armor-structured membrane exhibited much higher permeability for NH4 +-N recovery, which was 1.4 and 5 times that of the traditional PTFE membrane and PP membrane, respectively. Through long-term intermittent and consecutive experiments, the reusability and durability of the armor-structured nanofibrous membrane were verified. When treating actual hoggery wastewater with complicated water quality, the armor-structured nanofibrous membrane also displayed robust stable performance with excellent antiwettability. The mechanisms of membrane formation, corrosion resistance, and mass transfer were discussed in detail.

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Separation and recovery of ammonium from industrial wastewater containing methanol using copper hexacyanoferrate (CuHCF) electrodes

Cited by 16 publications

References 25 publications

Review—Electrochemical Separation of Organic and Inorganic Contaminants in Wastewater

Review—Electrochemical Separation of Organic and Inorganic Contaminants in Wastewater

Selective Separation of Ammonium from Wastewater Using Ion Conducting Channels of a Prussian Blue Analogue

Armor-Structured Interconnected-Porous Membranes for Corrosion-Resistant and Highly Permeable Waste Ammonium Resource Recycling

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