Formation of Nitrates in Aqueous Solutions Treated with Pulsed Corona Discharge: The Impact of Organic Pollutants

Preis, Sergei; Panorel, Iris; Coll, Sergi Llauger; Kornev, Iakov

doi:10.1080/01919512.2013.836955

Cited by 17 publications

(10 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In agreement with previous studies 13 , 14 , the indifference towards pulse frequency indicates that only short-lived species present during and shortly after the pulses contributed to NO x formation (OH radical lifetime on water surface is ~2.7 µs 15 , 1–2 orders of magnitude longer above the surface 5 ). Under N 2 , however, the TN formation rate at 1.98 g kWh −1 was almost half that in air, 3.69 g kWh −1 .…”

Section: Resultssupporting

confidence: 92%

Pulsed Corona Discharge Induced Hydroxyl Radical Transfer Through the Gas-Liquid Interface

Ajo

Kornev

Preis

2017

Sci Rep

Self Cite

View full text Add to dashboard Cite

The highly energetic electrons in non-thermal plasma generated by gas phase pulsed corona discharge (PCD) produce hydroxyl (OH) radicals via collision reactions with water molecules. Previous work has established that OH radicals are formed at the plasma-liquid interface, making it an important location for the oxidation of aqueous pollutants. Here, by contacting water as aerosol with PCD plasma, it is shown that OH radicals are produced on the gas side of the interface, and not in the liquid phase. It is also demonstrated that the gas-liquid interfacial boundary poses a barrier for the OH radicals, one they need to cross for reactive affinity with dissolved components, and that this process requires a gaseous atomic H scavenger. For gaseous oxidation, a scavenger, oxygen in common cases, is an advantage but not a requirement. OH radical efficiency in liquid phase reactions is strongly temperature dependent as radical termination reaction rates increase with temperature.

show abstract

Section: Resultssupporting

confidence: 92%

Pulsed Corona Discharge Induced Hydroxyl Radical Transfer Through the Gas-Liquid Interface

Ajo

Kornev

Preis

2017

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…This fraction could correspond to the residual humic structure observed in the fluorescence and which by its nature has a recalcitrant character that is difficult to eliminate (more aliphatic and polar) [41] . Finally, the intensity at 1540 and 1384 cm −1 would correspond to the formation of nitrogen groups caused by O 3 injection [47] .…”

Section: Resultsmentioning

confidence: 99%

Analysis of ultrasonic pre-treatment for the ozonation of humic acids

Alfonso-Muniozguren

Ferreiro

Richard

et al. 2021

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

“…In contrast, the energy efficiency of indigo carmine reduction dropped for increasing pulse frequency in a positive pulsed streamer wetted-wall reactor [129], in a negative pulsed DBD spray reactor [144], and in a positive pulsed DBD hybrid film and spray reactor [154]. In a negative pulsed DBD falling water film reactor [177] and a positive pulsed corona spray reactor [143], no influence of the frequency was observed. In bipolar pulsed electrohydraulic reactors, breakdown voltage decreases with frequency [62,96].…”

Section: Influence Of Working Parameters On Energy Efficiencymentioning

confidence: 90%

“…Here, droplets were not created by spraying, but due to condensation of steam under influence of up-flowing air. Alternatively, positive pulsed corona can also be generated in a spray reactor around wire anodes in parallel with two grounded plate cathodes [143], as depicted in Figure 8e. In another approach, water is sprayed in between rod electrodes that are each surrounded with a dielectric barrier (Figure 8f).…”

Section: Low-energy Spray Discharge Reactorsmentioning

confidence: 99%

Electrical Discharge in Water Treatment Technology for Micropollutant Decomposition

Vanraes¹,

Nikiforov²,

Leys³

2016

Plasma Science and Technology - Progress in Physical States and Chemical Reactions

View full text Add to dashboard Cite

Hazardous micropollutants are increasingly detected worldwide in wastewater treatment plant effluent. As this indicates, their removal is insufficient by means of conventional modern water treatment techniques. In the search for a cost-effective solution, advanced oxidation processes have recently gained more attention since they are the most effective available techniques to decompose biorecalcitrant organics. As a main drawback, however, their energy costs are high up to now, preventing their implementation on large scale. For the specific case of water treatment by means of electrical discharge, further optimization is a complex task due to the wide variety in reactor design and materials, discharge types, and operational parameters. In this chapter, an extended overview is given on plasma reactor types, based on their design and materials. Influence of design and materials on energy efficiency is investigated, as well as the influence of operational parameters. The collected data can be used for the optimization of existing reactor types and for development of novel reactors.

show abstract

Formation of Nitrates in Aqueous Solutions Treated with Pulsed Corona Discharge: The Impact of Organic Pollutants

Cited by 17 publications

References 15 publications

Pulsed Corona Discharge Induced Hydroxyl Radical Transfer Through the Gas-Liquid Interface

Pulsed Corona Discharge Induced Hydroxyl Radical Transfer Through the Gas-Liquid Interface

Analysis of ultrasonic pre-treatment for the ozonation of humic acids

Electrical Discharge in Water Treatment Technology for Micropollutant Decomposition

Contact Info

Product

Resources

About