Microbial desalination cell with capacitive adsorption for ion migration control

2020 ◽

Author(s):

Ummy Mardiana

Keyword(s):

Surface Modification ◽

Neutral Red ◽

Exchange Chromatography ◽

Seawater Desalination ◽

Catalytic Surface ◽

Sem Images ◽

Nacl Transport ◽

Ion Migration ◽

Significant Performance ◽

Microbial Desalination Cell

Microbial desalination cell (MDC) built on surface modification has been studied for seawater desalination. Herein, the bio-catalytic surface modification for maintenance the long-term MDC performance during desalination process has been developed. The goal of this study is to provide and develop a seawater desalination system without requiring energy support by applying a modification of anode as an electron acceptor, and the different potential charges that occur between anode and cathode can play as driving force for electrodialysis of seawater desalination. Yeast has been applied as biocatalyst, meanwhile neutral red has been chosen as redox mediator to facilitate the electron transport from bioactivity of cells. Several types of surface modification have been conducted, i.e. biocatalyst-mediator immobilization and electropolymerization of NR at the surface of the anode. The optimization of each device has been characterized by cyclic voltammetry, chronoamperometry, and observed in Microbial fuel cell (MFC) prior functioned in MDC. The concentrations of salt ion migration have been determined by Ion Exchange Chromatography. MFC results reported that the best configuration of surface modification was obtained from CF/PNR then applied in MDC. CF/PNR delivered the highly significant performance by having the maximum value of all tested parameters, i.e 42.2% of current efficiency; 27.11% of bio-devices efficiency; 92.5 mA m-2 of current density and also 61% of NaCl transport. The profiles of surface devices have been detected by Scanning electron microscope (SEM) and Energy Dispersive X-ray spectroscopy (EDX). A several spherical shapes around 4 nm within alginate layer have been detected from SEM images and it was confirmed as yeast, meanwhile 5.04% of N has been found from EDX spectrum and was indicated from PNR. The results show that surface modification could be a promising method for bioelectricity generation which simultaneously produces electricity and seawater desalination and provides a green chemistry technology.

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A New Method of Bio-Catalytic Surface Modification for Microbial Desalination Cell

International Journal of Renewable Energy Development ◽

10.14710/ijred.2021.34235 ◽

2021 ◽

Vol 10 (2) ◽

pp. 345-354

Author(s):

Ummy Mardiana ◽

Christophe Innocent ◽

Marc Cretin ◽

Buchari Buchari

Keyword(s):

Surface Modification ◽

Neutral Red ◽

Exchange Chromatography ◽

Anode Surface ◽

Seawater Desalination ◽

Nacl Transport ◽

Ion Migration ◽

Maximum Value ◽

Modified Surface ◽

Microbial Desalination Cell

A microbial desalination cell (MDC) built on a modified surface has been studied for seawater desalination. The goal of this study is to provide and develop a seawater desalination system that does not require energy support by applying a modification of the anode as an electron acceptor. The different potential charges that occur between anode and cathode can serve as the driving force for electrodialysis of seawater, resulting in its desalination. Yeast has been applied as a biocatalyst and neutral red has been chosen as a redox mediator to facilitate the electron transport originating from the bioactivity of cells. Several types of surface modification have been conducted, i.e., biocatalyst-mediator immobilisation and electropolymerisation of neutral red at the anode surface. The optimisation of each device has been characterised by cyclic voltammetry and chronoamperometry. It has also been observed in a microbial fuel cell (MFC), prior to being functioned in the MDC. The concentrations of salt ion migration have been determined by ion exchange chromatography. This study found that the best configuration of a modified surface was obtained from carbon felt coated by polyneutral red film (CF/PNR); this generated the maximum value of all tested parameters: 42.2% of current efficiency; 27.11% of bio-devices efficiency; 92.5 mA m-2 of current density; and 61% of NaCl transport. Moreover, the modified surface could be a promising method for improving anode performance.

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A new method of bio-catalytic surface modification for microbial desalination cell

10.21203/rs.3.rs-41414/v2 ◽

2020 ◽

Author(s):

Ummy Mardiana ◽

Christophe Innocent ◽

Marc Cretin ◽

Buchari Buchari

Keyword(s):

Surface Modification ◽

Neutral Red ◽

Exchange Chromatography ◽

Seawater Desalination ◽

Catalytic Surface ◽

Sem Images ◽

Nacl Transport ◽

Ion Migration ◽

Significant Performance ◽

Microbial Desalination Cell

Abstract Microbial desalination cell (MDC) built on surface modification has been studied for seawater desalination. Herein, the bio-catalytic surface modification for maintenance the long-term MDC performance during desalination process has been developed. The goal of this study is to provide and develop a seawater desalination system without requiring energy support by applying a modification of anode as an electron acceptor, and the different potential charges that occur between anode and cathode can play as driving force for electrodialysis of seawater desalination. Yeast has been applied as biocatalyst, meanwhile neutral red has been chosen as redox mediator to facilitate the electron transport from bioactivity of cells. Several types of surface modification have been conducted, i.e. biocatalyst-mediator immobilization and electropolymerization of NR at the surface of the anode. The optimization of each device has been characterized by cyclic voltammetry, chronoamperometry, and observed in Microbial fuel cell (MFC) prior functioned in MDC. The concentrations of salt ion migration have been determined by Ion Exchange Chromatography. MFC results reported that the best configuration of surface modification was obtained from CF/PNR then applied in MDC. CF/PNR delivered the highly significant performance by having the maximum value of all tested parameters, i.e 42.2% of current efficiency; 27.11% of bio-devices efficiency; 92.5 mA m-2 of current density and also 61% of NaCl transport. The profiles of surface devices have been detected by Scanning electron microscope (SEM) and Energy Dispersive X-ray spectroscopy (EDX). A several spherical shapes around 4 nm within alginate layer have been detected from SEM images and it was confirmed as yeast, meanwhile 5.04% of N has been found from EDX spectrum and was indicated from PNR. The results show that surface modification could be a promising method for bioelectricity generation which simultaneously produces electricity and seawater desalination and provides a green chemistry technology.

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Book Review

MIGRATION LETTERS ◽

10.33182/ml.v11i3.232 ◽

2014 ◽

Vol 11 (3) ◽

pp. 387-390

Author(s):

Antonina Levatino

Keyword(s):

Control Strategies ◽

Human Mobility ◽

Diverse Range ◽

Transnational Mobility ◽

Migration Management ◽

Nation States ◽

Migration Control ◽

Political Economic ◽

Controversial Nature

Martin Geiger & Antoine Pécoud (eds.), Disciplining the Transnational Mobility of People, Palgrave Macmillan, 2013, 271 pp., (ISBN 978-1-137-26306-3).In the last decades a very diverse range of initiatives have been undertaken in order to intensify and diversify the ways human mobility is managed and restricted. This trend towards a ‘diversification’ of the migration control strategies stems from the increased awareness by the nation-states of the profoundly controversial nature of the migration management enterprise because of its political, economic, social and moral implications.

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