On the electrolysis of dilute chloride solutions: Influence of the electrode material on Faradaic efficiency for active chlorine, chlorate and perchlorate

Neodo, Stefano; Rosestolato, Davide; Ferro, Sergio; Battisti, Achille De

doi:10.1016/j.electacta.2012.07.017

Cited by 112 publications

(66 citation statements)

References 22 publications

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“…A sequence of iodometric titration tests were carried out with a digital titration instrument (TITRETTE® brand) to determine the active chlorine species concentration produced (chlorite, chlorine dioxide, chlorate and perchlorate) at BDD anodes during electrolysis of NaCl solutions. Aliquots of 5 mL were sampled and chemically analyzed, as indicated by Neodo [14]. The different species were discriminated on the basis of their reactivity, which was emphasized by either changing the pH or adding specific reagents, as schematized by Eqs.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

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Understanding active chlorine species production using boron doped diamond films with lower and higher sp3/sp2 ratio

Brito

Araújo

Martínez‐Huitle

et al. 2015

Electrochemistry Communications

104

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Section: Electrochemical Measurementsmentioning

confidence: 99%

“…The pH value and cell potential were checked during the electrolysis because both parameters help to understand the formation of active chlorine species [14,15]. In the case of the perchlorate content, it was assessed by ion chromatography (IC), using an Ion Pack AS16 column (4 mm × 250 mm) and a 1 mL injection loop.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Understanding active chlorine species production using boron doped diamond films with lower and higher sp3/sp2 ratio

Brito

Araújo

Martínez‐Huitle

et al. 2015

Electrochemistry Communications

104

View full text Add to dashboard Cite

“…According to Neodo et al (2012), the production of reactive chlorine is linear until a maximum is reached, after which point a decrease is observed. The time to reach the maximum is strongly related to the applied current, being more rapid at high currents.…”

Section: Resultsmentioning

confidence: 98%

“…Moreover, the literature demonstrates that higher concentrations of electrolyte may also cause disadvantages to the final efficiency of reactive chlorine production. For example, Neodo et al (2012) claim that the generation of some undesirable inorganic disinfection co-products, such as chlorates and perchlorates, is proportional to the production of reactive chlorine. Jung et al (2010) assert that the production of chlorates and perchlorates are proportional to the initial concentration of Cl − .…”

Section: Effect Of Applied Electrolyte Concentration On the Reactive mentioning

confidence: 99%

“…A region from 30 to 90 min where the observed rate of reactive chlorine production continues to increase (a lower rate than in Region 2) at higher NaCl concentrations, but decreases at lower NaCl concentrations Neodo et al (2012) claim that: the fact that a maximum is observed in reactive chlorine production might prove that parallel reactions occur (production of chlorite, chlorine dioxide, chlorate, and perchlorates) due to the lower presence of chlorides in the bulk. AlHamaiedeh (2013) also alleged that in lower concentrations of NaCl, production of reactive chlorine increased until it reached a maximum and afterwards remained constant.…”

mentioning

confidence: 92%

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Photo-assisted electrochemical degradation of simulated textile effluent coupled with simultaneous chlorine photolysis

Florêncio

Araújo

Antonelli

et al. 2016

Environ Sci Pollut Res

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The influence of chloride ion concentration during the photo-assisted electrochemical degradation of simulated textile effluent, using a commercial Ti/Ru0.3Ti0.7O2 anode, was evaluated. Initially, the effect of applied current and supporting electrolyte concentration on the conversion of chloride ions to form reactive chlorine species in 90 min of experiment was analyzed in order to determine the maximum production of reactive chlorine species. The optimum conditions encountered (1.5 A and 0.3 mol dm(-3) NaCl) were subsequently employed for the degradation of simulated textile effluent. The efficiency of the process was determined through the analysis of chemical oxygen demand (COD), total organic carbon (TOC), of the presence of organochlorine products and phytotoxicity. Photo-assisted electrochemical degradation was more efficient for COD and TOC removal than the electrochemical technique alone. With simultaneous UV irradiation, a reduced quantity of reactive chlorine was produced, indicating that photolysis of the chlorine species led to the formation of hydroxyl radicals. This fact turns a simple electrochemical process into an advanced oxidation process.

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Nature, Mechanisms and Reactivity of Electrogenerated Reactive Species at Thin‐Film Boron‐Doped Diamond (BDD) Electrodes During Electrochemical Wastewater Treatment

2019

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Electrooxidation of hazardous organic pollutants contaminating wastewater using thin-film boron-doped diamond (BDD) electrodes is an efficient and well-studied treatment technique. In this review, the three main reactive species, namely: reactive oxygen, chlorine and sulfate species, which can be electrogenerated and then participate in the oxidation processes during electrooxidative wastewater treatment using BDD electrodes, are discussed. The main factors affecting the nature and quantity of the electrogenerated reactive species, specifically the composition of the BDD electrode (doping level and sp 3 /sp 2 ratio) and the operating parameters (working current density and composition of water matrix been electrolyzed) were explained with relative examples. Extensive discussion on mode and reactivity of the three reactive species with organic pollutants during electrooxidation was provided and the future perspectives and direction of research on reactive species generated on BDD electrodes were also discussed.[a] Dr.

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On the electrolysis of dilute chloride solutions: Influence of the electrode material on Faradaic efficiency for active chlorine, chlorate and perchlorate

Cited by 112 publications

References 22 publications

Understanding active chlorine species production using boron doped diamond films with lower and higher sp3/sp2 ratio

Understanding active chlorine species production using boron doped diamond films with lower and higher sp3/sp2 ratio

Photo-assisted electrochemical degradation of simulated textile effluent coupled with simultaneous chlorine photolysis

Nature, Mechanisms and Reactivity of Electrogenerated Reactive Species at Thin‐Film Boron‐Doped Diamond (BDD) Electrodes During Electrochemical Wastewater Treatment

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