Removal of bacteria from water by electroadsorption on porous carbon electrodes

Oren, Yoram; Tobias, Haim; Soffer, Abraham

doi:10.1016/0302-4598(83)90030-2

Cited by 27 publications

(16 citation statements)

References 9 publications

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“…Oren has named his version of CDI electrochemical parametric pumping [7,8]. He has published several comprehensive papers analysising the use of new carbon materials in the CDI process as well as fundamental electrochemical double layer issues of the electrodes [9][10][11][12][13]. In the mid-1990s, Farmer and co-workers [14][15][16][17] from the Lawrence Livermore National Labs (LLNL), developed a new kind of high specific surface area material which was called carbon aerogel for their CDI device and at the same time rekindled interest in CDI within the scientific community.…”

Section: Fig 1 Schematic Diagram Of Capacitive Deionization Processmentioning

confidence: 99%

Developing Nano-Structured Carbon Electrodes for Capacitive Brackish Water Desalination

Zou¹

2011

Expanding Issues in Desalination

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Section: Fig 1 Schematic Diagram Of Capacitive Deionization Processmentioning

confidence: 99%

Developing Nano-Structured Carbon Electrodes for Capacitive Brackish Water Desalination

Zou¹

2011

Expanding Issues in Desalination

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“…Golub et al (1987) reported that when applying a cell potential of 1.5 V between two carbon electrodes, removal efficiencies of 100% for Salmonella typhimurium and e. coli are achieved, compared to efficiencies of 85% and 95% respectively obtained when operating in open circuit, however, adsorbed bacteria are not necessarily dead (Golub et al 1987). Oren et al (1983) demonstrated that the removal of e. coli (negatively charged)…”

Section: Adsorption/electrosorption Of Microorganismsmentioning

confidence: 99%

“…Many studies have described that the tendency for bacteria adsorption on different materials surfaces is driven by electrostatic forces between charged groups present on the cell wall and the material surface, which are oppositely charged which can contribute to the disinfection of the wastewater (Golub et al 1987, Matsunaga et al 2000, Oren et al 1983. However, despite microorganisms may be partially removed from the water, they are not being inactivated and can continue growing on the material surface and they can be eventually released to the treated water when the material becomes saturated.…”

Section: Adsorption/electrosorption Of Microorganismsmentioning

confidence: 99%

“…One of the mechanisms of microorganism removal in the presence of an adsorbent material is the attachment of the cells at the pores of the material surface (Golub et al 1987, Karumuri et al 2013, Oren et al 1983). Many studies have described that the tendency for bacteria adsorption on different materials surfaces is driven by electrostatic forces between charged groups present on the cell wall and the material surface, which are oppositely charged which can contribute to the disinfection of the wastewater (Golub et al 1987, Matsunaga et al 2000, Oren et al 1983.…”

Section: Adsorption/electrosorption Of Microorganismsmentioning

confidence: 99%

“…Desorption of the adsorbed cells is induced by switching the polarity of the electrode (Oren et al 1983).…”

Section: Adsorption/electrosorption Of Microorganismsmentioning

confidence: 99%

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Novel decentralized greywater treatment system based on combined adsorption and electrochemical oxidation

Garcia¹

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Electrochemical technologies for wastewater treatment present several promising characteristics to be used as decentralized water treatment systems to provide a sustainable and cost effective growing water supply complementing centralized water supply systems. However, their application and scaling up has been hindered by the high energy input required, and the mass transfer limitations.To address these limitations, the aim of this thesis is to develop a novel decentralized water treatment system to treat greywater produced at household scale. The system, a three-dimensional (3D) electrochemical reactor, comprises a flow-through electrochemical reactor, in which the contaminated solution will pass through the borondoped diamond (BDD) anode mesh, maximizing the total contact surface of the electrode.In addition, granular activated carbon (GAC) has been added as a bed material in the reactor, which has been recognized that can enhance the performance of the conventional two-dimensional (2D) system due to its adsorption properties and by acting as a third electrode within the system.The main goals of this thesis are: (i) to elucidate how the presence of a bed material can enhance the performance of the electrochemical treatment; (ii) to develop a proof-ofconcepts on the performance of a 3D electrochemical oxidation system for the treatment of greywater; (iii) to determine the effect of current density and volume of greywater loaded, and the bed material on the performance of the 3D system; (iv) to explore the viability of the electrochemical regeneration of the bed material when operating the 3D system for the treatment of greywater.The reactor has worked under three different configurations: (i) adsorption onto activated carbon (GAC system), (ii) electrochemical oxidation on BDD anode (2D system), and (iii) combined adsorption and electrochemical oxidation (3D system) for the treatment of simulated (SGW) and real greywater (RGW). Electrochemical experiments were conducted at a fixed current density of 15 A m ) and two different volume loads (2 L and 6 L) to study the effect of these two parameters in the performance ii of the 3D system (Chapter 6). To minimise the adsorption and catalytic effect of the GAC and determine the electrochemical oxidation capacity of the bed material acting as a third electrode, it has been substituted granular graphite (GG) (Chapter 7). Electrochemical regeneration of the GAC in the 3D system has been studied over the time by loading the reactor with saturated GAC (Chapter 8). Finally, an economic analysis has been conducted for the implementation of a 3D electrochemical system at household scale (Chapter 9).The results showed that the efficiency of a conventional 2D electrochemical system can be enhanced by up to 86% for the removal of chemical oxygen demand (COD) and total organic carbon (TOC) in the 3D system. Obtained positive synergy values suggest that the combination of these two processes may trigger other electrochemical reactions in the 3D system while enabling the el...

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Photocatalytic Materials in Water Disinfection

Bandala

Bustos

2014

Photocatalytic Semiconductors

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Removal of bacteria from water by electroadsorption on porous carbon electrodes

Cited by 27 publications

References 9 publications

Developing Nano-Structured Carbon Electrodes for Capacitive Brackish Water Desalination

Developing Nano-Structured Carbon Electrodes for Capacitive Brackish Water Desalination

Novel decentralized greywater treatment system based on combined adsorption and electrochemical oxidation

Photocatalytic Materials in Water Disinfection

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