Electrochemical filtration process for simultaneous removal of refractory organic and particulate contaminants from wastewater effluents

Mameda, Naresh; Park, Hyeona; Choo, Kwang‐Ho

doi:10.1016/j.watres.2018.08.003

Cited by 38 publications

(9 citation statements)

References 65 publications

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“…Although promising, the potential of conventional electrochemical technologies is hampered by slow diffusive mass transport in conventional batch reactors as well as the design of effective and robust electrode materials . This underscores the need for optimal reactor configuration and electrode design to achieve the desired operational improvements. , …”

Section: Introductionmentioning

confidence: 99%

“…9 This underscores the need for optimal reactor configuration and electrode design to achieve the desired operational improvements. 10,11 Recent advances in electrooxidative water treatment have focused on the development of advanced anode materials and novel structures based on boron-doped diamond (BDD), doped SnO 2 substoichiometric TiO 2 , and carbon. 12 Among these materials, carbon nanotubes (CNTs) have gained considerable recent attention from the community due to their combined electronic, physicochemical, and mechanical properties.…”

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confidence: 99%

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Prospects of an Electroactive Carbon Nanotube Membrane toward Environmental Applications

2020

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Metrics & MoreArticle Recommendations * sı Supporting Information CONSPECTUS: Rapid population growth and industrialization have driven the emergence of advanced electrochemical and membrane technologies for environmental and energy applications. Electrochemical processes have potential for chemical transformations, chloralkali disinfection, and energy storage. Membrane separations have potential for gas, fluid, and chemical purification. Electrochemical and membrane technologies are often used additively in the same unit process, e.g., the chloroalkali process where a membrane is used to separate cathodic and anodic products from scavenging each other. However, to access the maximal potential requires intimate hybridization of the two technologies into an electroactive membrane. The combination of the two discrete technologies results in a range of synergisms such as reduced footprint, increased processing kinetics, reduced fouling, and increased energy efficiency. Due to their high specific surface area, excellent electric conductivity, and desirable robustness, 1D carbon nanotubes (CNTs) hold promise for many applications over a range of industry sectors such as a base material for electrodes and membranes. Importantly, CNT morphology and surface chemistry can be rationally modified and fine-tuning of these CNT physicochemical properties can enhance their functionality toward practical applications. The CNT 1D form allows assembly of a stable thin-film fibrous network by a variety of facile techniques. These CNT networks have pore sizes in the range of 10−500 nm (d pore ∼ 6−8d CNT ) and thicknesses of 10−200 μm, both similar to those of classical polymer membranes, thus allowing for straightforward incorporation into commercial membrane devices modified for electroactivity inclusion.In this Account, CNTs and their composites are used as model electroactive porous materials to exemplify the design strategies and environmental applications of emerging electroactive membrane technology. The Account begins with a brief summary of the electroactive membrane design principles and flow processes developed by our groups. After the methodology section, a detailed discussion is provided on the underlying physical-chemical mechanisms that govern the electroactive membrane technology. Then we summarize our findings on the rational design of several flow-through electrochemical CNT filtration systems focused on either anodic oxidation reactions or cathodic reduction reactions. Subsequently, we discuss a recently discovered electrochemical valencestate-regulation strategy that is capable to detoxify and sequester heavy metal ions. Finally, we conclude the Account with our perspectives toward future development of the electroactive membrane technology.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Prospects of an Electroactive Carbon Nanotube Membrane toward Environmental Applications

2020

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“…The removal percentage with the initial concentration of 200 mg/L was significantly lower than that of the other lower initial concentration. It may be caused by that the highly initial MO concentration leads to a competition effect among the MO molecules and a decline in decolorization efficiency [33,34]. However, with the increase of initial concentration, the removal capacity of nZVI was obviously improved.…”

Section: Effect Of Initial Concentrationmentioning

confidence: 99%

Preparation of Biomass Activated Carbon Supported Nanoscale Zero-Valent Iron (Nzvi) and Its Application in Decolorization of Methyl Orange from Aqueous Solution

Zhang

Wang

2019

Water

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The nanoscale zero-valent iron (nZVI) has great potential to degrade organic polluted wastewater. In this study, the nZVI particles were obtained by the pulse electrodeposition and were loaded on the biomass activated carbon (BC) for synthesizing the composite material of BC-nZVI. The composite material was characterized by SEM-EDS and XRD and was also used for the decolorization of methyl orange (MO) test. The results showed that the 97.94% removal percentage demonstrated its promise in the remediation of dye wastewater for 60 min. The rate of MO matched well with the pseudo-second-order model, and the rate-limiting step may be a chemical sorption between the MO and BC-nZVI. The removal percentage of MO can be effectively improved with higher temperature, larger BC-nZVI dosage, and lower initial concentration of MO at the pH of 7 condition.

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“…However, some of these largely used methods can be (i) energy intensive and/or expensive, (ii) lead to incomplete removal of metals, (iii) present low efficiencies for very high or low metals concentrations, (iv) require high consumption of reagents, more or less toxic or expensive or scarce, (v) produce toxic sludge or other wasted products that need complement treatments, (vi) require regeneration steps more or less complex or energy-intensive, (vii) need complex implementation and maintenance, etc. To ensure a less negative impact of these issues, constant improvements are necessary to respect the acceptable concentrations [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Innovative electrochemical process for a total removal and/or separation of soluble heavy metals

Choumane¹,

Peulon²

2022

Journal of Environmental Chemical Engineering

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Electrochemical filtration process for simultaneous removal of refractory organic and particulate contaminants from wastewater effluents

Cited by 38 publications

References 65 publications

Prospects of an Electroactive Carbon Nanotube Membrane toward Environmental Applications

Prospects of an Electroactive Carbon Nanotube Membrane toward Environmental Applications

Preparation of Biomass Activated Carbon Supported Nanoscale Zero-Valent Iron (Nzvi) and Its Application in Decolorization of Methyl Orange from Aqueous Solution

Innovative electrochemical process for a total removal and/or separation of soluble heavy metals

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