Products and mechanism of verapamil removal in water by air non-thermal plasma treatment

Krishna, S. Aravind; Ceriani, Elisa; Marotta, Ester; Giardina, Agata; Špatenka, Petr; Paradisi, Cristina

doi:10.1016/j.cej.2016.01.108

Cited by 44 publications

(21 citation statements)

References 26 publications

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“…Higher rate constant of organic compounds degradation with decreasing initial concentration is commonly observed in plasma treatment, and was explained by the higher ratio between the concentration of plasma generated reactive species and that of the target pollutants, including degradation products, which also compete for the same oxidizing species. A recent modeling study takes into account this competition, and considers that the degradation of an organic compound depends not only on its own reaction rate, but also on the degradation rates of the intermediate products resulting from the decomposition of the target compound .…”

Section: Resultsmentioning

confidence: 96%

High efficiency plasma treatment of water contaminated with organic compounds. Study of the degradation of ibuprofen

Măgureanu

Mandache

Bradu

et al. 2018

Plasma Processes & Polymers

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The degradation of ibuprofen in water by nonthermal plasma is studied using a pulsed corona discharge above liquid, generated in oxygen. The influence of pulse duration (50-430 ns FWHM) on removal efficiency and on mineralization was investigated.Complete removal of the target compound was achieved within 15-20 min plasma treatment and the mineralization degree reached 76% after 60 min. The energy efficiency was greatly enhanced by reducing pulse length: 20.2 g kWh −1 was obtained for 50 ns pulses at 90% IBP removal, more than one order of magnitude higher than the value for the longest pulses. Higher initial concentration of the target compound led to further improvement of the energy yield, but required more time to complete the degradation process. K E Y W O R D S energy efficiency, ibuprofen, non-thermal plasma, pulse duration, pulsed corona discharge Plasma Process Polym. 2018;15:e1700201.www.plasma-polymers.com

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Section: Resultsmentioning

confidence: 96%

High efficiency plasma treatment of water contaminated with organic compounds. Study of the degradation of ibuprofen

Măgureanu

Mandache

Bradu

et al. 2018

Plasma Processes & Polymers

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“…The extent of mineralization, however, also depends drastically on the concentration of the organic pollutant being treated. Thus, Krishna et al (2016) found that treatment of the drug Verapamil in the same reactor as used in the present study afforded only 14 % of mineralization in 4 h when the drug initial concentration was 5 × 10 −5 M but reached 98 % in 5 h when the initial concentration was 1 × 10 −5 M. The CFA concentrations used in the present study are higher than those of Verapamil in the above mentioned experiments and, most importantly, are also much higher than found in CFA contaminated waters in the environment. Thus, both the degradation efficiency and the extent of mineralization are expected to be much higher for NTP treatment of CFA solutions at the environmental levels of pollution.…”

Section: Decomposition Productsmentioning

confidence: 99%

Oxidation of clofibric acid in aqueous solution using a non-thermal plasma discharge or gamma radiation

et al. 2017

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In this work, we study degradation of clofibric acid (CFA) in aqueous solution using either ionizing radiation from a 60 Co source or a non-thermal plasma produced by discharges in the air above the solution. The results obtained with the two technologies are compared in terms of effectiveness of CFA degradation and its by-products. In both cases the CFA degradation follows a quasi-exponential decay in time well modelled by a kinetic scheme which considers the competition between CFA and all reaction intermediates for the reactive species generated in solution as well as the amount of the end product formed. A new degradation law is deduced to explain the results. Although the end-product CO 2 was detected and the CFA conversion found to be very high under the studied conditions, HPLC analysis reveals several degradation intermediates still bearing the aromatic ring with the chlorine substituent. The extent of mineralization is rather limited. The energy yield is found to be higher in the gamma radiation experiments.

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“…Based on the determined oxidation intermediates, researchers have suggested that the main degradation mechanism relies on OH radical attacks, subsequent hydroxylation, and the damaging of molecular bonds, which leads to mineralization [117,118]. Reports on the application of NTAPP to remove antibiotics such as atenolol [119], verapamil [120], and enalapril [121] have been pub-lished. Krishna et al [120] proposed that DBD reactors attack OH radicals and O 3 on the amino group and aromatic rings for verapamil oxidation.…”

Section: Decontamination Of Chemical Pollutantsmentioning

confidence: 99%

Recent Progress in Applications of Non-Thermal Plasma for Water Purification, Bio-Sterilization, and Decontamination

et al. 2021

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Various reactive oxygen and nitrogen species are accompanied by electrons, ultra-violet (UV) radiation, ions, photons, and electric fields in non-thermal atmospheric pressure plasma. Plasma technology is already used in diverse fields, such as biomedicine, dentistry, agriculture, ozone generation, chemical synthesis, surface treatment, and coating. Non-thermal atmospheric pressure plasma is also considered a promising technology in environmental pollution control. The degradation of organic and inorganic pollutants will be massively advanced by plasma-generated reactive species. Various investigations on the use of non-thermal atmospheric pressure plasma technology for organic wastewater purification have already been performed, and advancements are continuing to be made in this area. This work provides a critical review of the ongoing improvements related to the use of non-thermal plasma in wastewater control and outlines the operational principle, standards, parameters, and boundaries with a special focus on the degradation of organic compounds in wastewater treatment.

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Products and mechanism of verapamil removal in water by air non-thermal plasma treatment

Cited by 44 publications

References 26 publications

High efficiency plasma treatment of water contaminated with organic compounds. Study of the degradation of ibuprofen

High efficiency plasma treatment of water contaminated with organic compounds. Study of the degradation of ibuprofen

Oxidation of clofibric acid in aqueous solution using a non-thermal plasma discharge or gamma radiation

Recent Progress in Applications of Non-Thermal Plasma for Water Purification, Bio-Sterilization, and Decontamination

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