Separation and recovery of Cr(III) and Cr(VI) using electrodeionization as an efficient approach

Zhang, Zhaoyang; Liba, Daniel; Alvarado, Lucía; Chen, Aicheng

doi:10.1016/j.seppur.2014.09.030

Cited by 48 publications

(8 citation statements)

References 47 publications

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“…Therefore, we can first convert negatively charged pollutants to cations (here, it is nitrate to ammonium) and then connect these bacteria to a circuit to lead electrons to the counter electrode, producing an electric field to migrate and concentrate these produced cations to the catholyte for recovery. This concept can be extended to the recovery of the resources needing electric charge variations in wastewaters, such as Cr …”

Section: Resultsmentioning

confidence: 99%

“…This concept can be extended to the recovery of the resources needing electric charge variations in wastewaters, such as Cr. 58 Perspectives. Ammonium, nitrite, and nitrate in wastewaters were conventionally reduced to gaseous nitrogen and NOx in wastewater treatment plants, consuming electrons from organic matters in terms of biochemical oxygen demand (BOD), which was a huge loss of the bioavailable nitrogen source.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Bioelectrochemical Ammoniation Coupled with Microbial Electrolysis for Nitrogen Recovery from Nitrate in Wastewater

Wan

Huang

Zhou

et al. 2019

Environ. Sci. Technol.

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Nitrate-N in wastewaters is hard to be recovered because it is difficult to volatilize with an opposite charge to ammonium. Here, we have proved the feasibility of dissimilatory nitrate reduction to ammonia (DNRA) by the easy-acclimated mixed electroactive bacteria, achieving the highest DNRA efficiency of 44%. It was then coupled with microbial electrolysis to concentrate ammonium by a factor of 4 in the catholyte for recovery. The abundance of electroactive bacteria in the biofilm before nitrate addition, especially Geobacter spp., was found to determine the DNRA efficiency. As the main competitors of DNRA bacteria, the growth of denitrifiers was more sensitive to C/N ratios. The DNRA microbial community contrarily showed a stable and recoverable ammoniation performance over C/N ratios ranging from 0.5 to 8.0. A strong competition of the electrode and nitrate on electron donors was observed at the early stage (15 d) of electroactive biofilm formation, which can be weakened when the biofilm was mature on 40 d. Quantitative PCR showed a significant increase in nirS and nrfA transcripts in the ammoniation process. nirS was inhibited significantly after nitrate depletion while nrfA was still upregulated. These findings provided a novel way to recover nitrate-N using organic wastes as both electron donor and power, which has broader implications on the sustainable wastewater treatment and the ecology of nitrogen cycling.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

Bioelectrochemical Ammoniation Coupled with Microbial Electrolysis for Nitrogen Recovery from Nitrate in Wastewater

Wan

Huang

Zhou

et al. 2019

Environ. Sci. Technol.

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“…This might be probably due to the increase in ionized groups due to the pretreatment of commercial resins using H2SO4/NaOH solutions. Thus, the pretreated or saturated marine algae can be expected to lower the overall energy consumption of the process, as reported in other works [193,194]. From the present knowledge attained, it is not possible to arrive at a conclusion on the nature of the ion exchange bed, if it acts as an ion-selective or just conductive bed.…”

mentioning

confidence: 60%

Selective recovery of rare-earth elements from diluted aqueous streams using N- and O-coordination ligand–grafted organic–inorganic hybrid composites

Ramasamy

Repo

2020

Advanced Water Treatment

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“…Cr(VI) and Cr(III) coexisting in wastewater can be removed by electrodialytic techniques. For example, EDI was able to remove both Cr 3+ and

from a model solution with 100 ppm of both contaminants, but with higher removal for the latter [ 204 ]. The separation from salt mixtures with monovalent or divalent ions is more difficult [ 205 ].…”

Section: Industrial Wastewatermentioning

confidence: 99%

Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives

et al. 2020

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This paper presents a comprehensive review of studies on electrodialysis (ED) applications in wastewater treatment, outlining the current status and the future prospect. ED is a membrane process of separation under the action of an electric field, where ions are selectively transported across ion-exchange membranes. ED of both conventional or unconventional fashion has been tested to treat several waste or spent aqueous solutions, including effluents from various industrial processes, municipal wastewater or salt water treatment plants, and animal farms. Properties such as selectivity, high separation efficiency, and chemical-free treatment make ED methods adequate for desalination and other treatments with significant environmental benefits. ED technologies can be used in operations of concentration, dilution, desalination, regeneration, and valorisation to reclaim wastewater and recover water and/or other products, e.g., heavy metal ions, salts, acids/bases, nutrients, and organics, or electrical energy. Intense research activity has been directed towards developing enhanced or novel systems, showing that zero or minimal liquid discharge approaches can be techno-economically affordable and competitive. Despite few real plants having been installed, recent developments are opening new routes for the large-scale use of ED techniques in a plethora of treatment processes for wastewater.

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Separation and recovery of Cr(III) and Cr(VI) using electrodeionization as an efficient approach

Cited by 48 publications

References 47 publications

Bioelectrochemical Ammoniation Coupled with Microbial Electrolysis for Nitrogen Recovery from Nitrate in Wastewater

Bioelectrochemical Ammoniation Coupled with Microbial Electrolysis for Nitrogen Recovery from Nitrate in Wastewater

Selective recovery of rare-earth elements from diluted aqueous streams using N- and O-coordination ligand–grafted organic–inorganic hybrid composites

Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives

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