Ferrate(VI) as a greener oxidant: Electrochemical generation and treatment of phenol

Sun, Xuhui; Zhang, Qi; Liang, Huihui; Li, Ying; Meng, Xiangxu; Sharma, Virender K.

doi:10.1016/j.jhazmat.2015.12.020

Cited by 81 publications

(31 citation statements)

References 52 publications

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“…Further increase in NaOH concentration causes a decrease in current efficiency and ferrate (VI) yield. When the concentration of sodium hydroxide approaches to its saturated value of around 20M, the electrolyte solution will become very viscous and solution conductivity will decline significantly resulting in a lower rate of electron transfer on the anode surface and ferrate (VI) generation [20].…”

Section: Electrolyte Compositionmentioning

confidence: 99%

“…Generally, increasing the specific surface area of the anode yields a significant enhancement of production rates. Several authors reported the utilization of threedimensional iron anodes in a form of iron wire gauze [22,23], porous magnetite electrode [24], pressed iron powder [12,24], iron chunks [25], and sponge iron [20].…”

Section: Other Important Synthesis Parametersmentioning

confidence: 99%

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Electrochemical synthesis of ferrate (VI) for the wastewater treatment

Simonović¹,

Pešovski²,

Krstić³

2018

Min Metal Eng Bor

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Ferrate ion, FeO 4 2or Fe(VI), has long been known as a very powerful and environmentally benign oxidizing agent suitable for a wide range of applications: organic synthesis, water and wastewater treatment, corrosion protection, and as a cathode material in the new super iron batteries. Several technique have been developed for the synthesis of ferrates including the thermal, wet chemical and electrochemical. The electrochemical approach has received the most attention of the three synthesis methods because it is easier to perform, does not require harmful and costly chemicals and provides the possibility for continuous production. The electrochemical synthesis of ferrate (VI) is reviewed in this work. Particular attention is paid to the influence of factors such as the anode material, electrolyte composition, temperature and current density. Mechanism of ferrate synthesis and recent advances in this field are discussed as well.

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Section: Electrolyte Compositionmentioning

confidence: 99%

Section: Other Important Synthesis Parametersmentioning

confidence: 99%

Electrochemical synthesis of ferrate (VI) for the wastewater treatment

Simonović¹,

Pešovski²,

Krstić³

2018

Min Metal Eng Bor

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“…One of the drawbacks is that the wet method used pure chemicals and required many operations for Fe(VI) preparation and separation, making it very costly. Moreover, the water reacts with ferrate (Equation (1)) leading to its reduction into Fe(III).The electrochemical method [21,22,23], allowing the oxidation of anode (iron or its alloys) by operating mainly in concentrated NaOH and/or KOH solutions. However, the decomposition of Fe(VI) by water, low current efficiency, and anode passivation are some of the concerns for this route.…”

Section: Introductionmentioning

confidence: 99%

Green Process for Industrial Waste Transformation into Super-Oxidizing Materials Named Alkali Metal Ferrates (VI)

et al. 2019

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The investigation presented here features the design of a cleaner and greener chemical process for the conversion of industrial wastes into super-oxidizing materials. The waste of interest is the iron sulfate heptahydrate (FeSO4·7H2O) mainly generated through the sulfate route used for titanium dioxide industrial production. The products of this transformation process are alkali ferrates (A2FeO4, A = Na, K) containing iron in its hexavalent state and considered as powerful oxidants characterized by properties useful for cleaning waters, wastewaters, and industrial effluents. The proposed process includes two steps: (i) The first step consisting of the pre-mixing of two solids (AOH with FeSO4·xH2O) in a rotary reactor allowing the coating of iron sulfate in the alkali hydroxides through solid–solid reactions; and (ii) the second step involves the synthesis of alkali ferrates in a fluidized bed by oxidation of the single solid obtained in the first step in diluted chlorine. The chemical synthesis of alkali ferrates can be carried out within a timeframe of a few minutes. The usage of a fluidized bed enhanced the energy and mass transfer allowing a quasi-complete control of the ferrate synthesis process. The alkali ferrate synthesis process described here possesses many characteristics aligned with the principles of the “green chemistry”.

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“…Значительно возросший в последние годы интерес к ферратам(VI) -одним из самых сильных окислителей -обусловлен перспективой их широкого применения для решения экологических проблем [1][2][3][4]. Однако высокая стоимость соединений Fe(VI), получаемых по традиционным технологиям, стимулирует поиск путей снижения затрат на их производство.…”

Section: Introductionunclassified

“…Химический синтез ферратов(VI) сводится к окислению соединений Fe(II) или Fe(III) с помощью сильных окислителей (O 3 , Cl 2 , ClO − , Na 2 O 2 и др.) [1][2][3][5][6][7][8]. Так, наилучшие результаты получены при взаимодействии гипохлорита с кристаллогидратом нитрата железа(III):…”

Section: Introductionunclassified

Modernization of ferrate (VI) technology from the iron hydroxides

Головко

Шевченко

et al. 2017

TAPR

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Ferrate(VI) as a greener oxidant: Electrochemical generation and treatment of phenol

Cited by 81 publications

References 52 publications

Electrochemical synthesis of ferrate (VI) for the wastewater treatment

Electrochemical synthesis of ferrate (VI) for the wastewater treatment

Green Process for Industrial Waste Transformation into Super-Oxidizing Materials Named Alkali Metal Ferrates (VI)

Modernization of ferrate (VI) technology from the iron hydroxides

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