Desalination of brackish water using a microbial desalination cell: Analysis of the electrochemical behaviour

Ramírez-Moreno, Marina; Esteve‐Núñez, Abraham; Ortíz, Juan Manuel

doi:10.1016/j.electacta.2021.138570

Cited by 23 publications

(4 citation statements)

References 46 publications

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“…-Analysis of the electrochemical behavior of a three-chamber MDC. [19] -Brackish water (NaCl, 7 g L −1 ), -Seawater.…”

Section: Study Aims Saline Water Type Outcomes Limitationsmentioning

confidence: 99%

“…As can be seen here, MDCs have the flexibility to be used for various kinds of saline solutions such as brine produced by a desalination plant, diluted industrial wastewater, real geothermal water, and seawater. [ 17 , 18 , 19 , 20 ] They produce acceptable treatment results with a desalination performance of up to 97.4% [ 21 ] and a COD removal efficiency of up to 97.8%. [ 20 ] Moreover, they can remove toxic elements such as arsenic [ 17 ] and boron [ 22 ] from water.…”

Section: Current Research On MDCmentioning

confidence: 99%

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Microbial Desalination Cell for Sustainable Water Treatment: A Critical Review

Aber,

Shi,

Xing

et al. 2023

Global Challenges

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In view of increasing threats arising from the shortage of fresh water, there is an urgent need to propose sustainable technologies for the exploitation of unconventional water sources. As a derivative of microbial fuel cells (MFCs), microbial desalination cell (MDC) has the potential of desalinating saline/brackish water while simultaneously generating electricity, as well as treating wastewater. Therefore, it is worth investigating its practicability as a potential sustainable desalination technology. This review article first introduces the fundamentals and annual trends of MDCs. The desalination of diverse types of solutions using MDCs along with their life cycle impact assessment (LCIA) and economic analysis is studied later. Finally, limitations and areas for improvement, prospects, and potential applications of this technology are discussed. Due to the great advantages of MDCs, improving their design, building materials, efficiency, and throughput will offer them as a significant alternative to the current desalination technologies.

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“…-Analysis of the electrochemical behavior of a three-chamber MDC. [19] -Brackish water (NaCl, 7 g L −1 ), -Seawater.…”

Section: Study Aims Saline Water Type Outcomes Limitationsmentioning

confidence: 99%

Section: Current Research On MDCmentioning

confidence: 99%

Microbial Desalination Cell for Sustainable Water Treatment: A Critical Review

Aber,

Shi,

Xing

et al. 2023

Global Challenges

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“…In the direction of microalgae assisted desalination cell, Chlorella vulgaris is reported to generate 0.12 mA/cm 2 current density with 60.15% desalinate efficiency [25]. Further, waste water treatment, brackish water desalination and electric energy production are integrated with key finding that electrochemical performance can be predicted with conductivity variation [26].…”

Section: Challenges Concerned With Algae-water Separationmentioning

confidence: 99%

The Feasibility Study of Green Microalgae Assisted Coal Mine Effluent Desalination

Rawat¹,

Kumar²

2022

Proceedings of the Conference BioSangam 2022: Emerging Trends in Biotechnology (BIOSANGAM 2022)

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Carbon-neutral sustainable approaches are highly demanding in the coal energy sector. Coal mine effluent disposal is a severe challenge with crucial concern issues of salinity hazard and heavy metal contamination due to long-duration water and coal interaction. The medium to the high salinity of coal mine effluent leads towards irrigation unsuitability due to the negative impact upon infiltration and permeability of nutrients from the soil to plant. Focusing on the international irrigation water quality standards given by the Food and Agriculture Organization (FAO) of the United Nations, most coal mine effluents are considered negatively impacting crops, soil fertility, groundwater, and aquatic life. Therefore, the current study investigates the direct cultivation suitability of Chlorella pyrenoidosa to simultaneously treat coal mine effluent for salinity removal and biomass production. Initially, C. pyrenoidosa culture adaptation in varying concentrations of coal mine effluents (25%–100%) in coal mine effluent, which are collected from two different points of coal mine named as coal mine effluent 1 (CME1) and coal mine effluent 2 (CME2). Evaluating C. pyrenoidosa growth kinetics, it was observed that the doubling time extended from 2.25 days (100% BG-11 as a medium; control) to 4.33 days (100% CME as a medium). Interestingly, the highest value for biomass production was 1.78 ± 0.12 g/ L with 25% CME 1 supplemented with essential growth nutrients; this value lies near 100% BG11 supplemented growth, 1.81 ± 0.05 g/L. In the current study, taking salinity removal as a prime concern, 100% utilization of CME-2 in place of BG-11 medium was very significant for salinity reduction from 4.80 ± 0.50 mS/cm (initial) to 0.98 ± 0.02 mS/cm (final) during 14 days batch growth. In continuation of that, the significant finding was salinity reduction of both samples (50% and 75% sample) to the level of 0.7 mS/ cm, which lies under the FAO guidelines for irrigation. Present findings also revealed an alternative to conventional processes, i.e., thermal and membrane desalination. Microalgae-assisted desalination is a novel, energy-efficient, eco-sustainable, cost-effective, and long-term operational approach. It has good potential to treat medium to sub-optimal salinity of coal mine effluent coupled with high-value biomass production.

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“…Electroactive microbes (EAMs) are organisms with the unique capability to export electrons from the cytoplasm to outside the cell, in a process known as extracellular electron transfer (EET). − Two of the best studied of these organisms, members of the Shewanella and Geobacter genera, employ this electron transfer capability for respiration, among other fundamental cellular processes. − Critically, this capability can also be harnessed for sustainable technologies, with the potential of microbial power to enable desalination, fuel cells, and wastewater treatment. − However, these strategies have yet to be implemented outside of the lab due to their limited current generation and slow interfacial electron transfer.…”

Section: Introductionmentioning

confidence: 99%

Mixed Conducting Polymers Alter Electron Transfer Thermodynamics to Boost Current Generation from Electroactive Microbes

Agee,

Pace,

Yang

et al. 2024

J. Am. Chem. Soc.

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Electroactive microbes that can release or take up electrons are essential components of nearly every ecological niche and are powerful tools for the development of alternative energy technologies. Small-molecule mediators are critical for this electron transfer but remain difficult to study and engineer because they perform concerted twoelectron transfer in native systems but only individual, one-electron transfers in electrochemical studies. Here, we report that electrode modification with ion-and electron-conductive polymers yields biosimilar, concerted two-electron transfer from Shewanella oneidensis via flavin mediators. S. oneidensis biofilms on these polymers show significantly improved per-microbe current generation and morphologies that more closely resemble native systems, setting a new paradigm for the study and optimization of these electron transfer processes. The unprecedented concerted electron transfer was found to be due to altered mediator electron transfer thermodynamics, enabling biologically relevant studies of electroactive biofilms in the lab for the first time. These important findings pave the way for a complete understanding of the ecological role of electroactive microbes and their broad application in sustainable technologies.

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Desalination of brackish water using a microbial desalination cell: Analysis of the electrochemical behaviour

Cited by 23 publications

References 46 publications

Microbial Desalination Cell for Sustainable Water Treatment: A Critical Review

Microbial Desalination Cell for Sustainable Water Treatment: A Critical Review

The Feasibility Study of Green Microalgae Assisted Coal Mine Effluent Desalination

Mixed Conducting Polymers Alter Electron Transfer Thermodynamics to Boost Current Generation from Electroactive Microbes

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