Degradation of diclofenac and 4-chlorobenzoic acid in aqueous solution by cold atmospheric plasma source
dc.contributor.author
dc.date.accessioned
2023-03-24T09:26:59Z
dc.date.available
2023-03-24T09:26:59Z
dc.date.issued
2023-03-15
dc.identifier.issn
0048-9697
dc.identifier.uri
dc.description.abstract
In this study, cold atmospheric plasma (CAP) was explored as a novel advanced oxidation process (AOP) for water decontamination. Samples with high concentration aqueous solutions of Diclofenac sodium (DCF) and 4-Chlorobenzoic acid (pCBA) were treated by plasma systems. Atmospheric pressure plasma jets (APPJs) with a 1 pin-electrode and multi-needle electrodes (3 pins) configurations were used. The plasma generated using argon as working gas was touching a stationary liquid surface in the case of pin electrode-APPJ while for multi-needle electrodes-APPJ the liquid sample was flowing during treatment. In both configurations, a commercial RF power supply was used for plasma ignition. Measurement of electrical signals enabled precise determination of power delivered from the plasma to the sample. The optical emission spectroscopy (OES) of plasma confirmed the appearance of excited reactive species in the plasma, such as hydroxyl radicals and atomic oxygen which are considered to be key reactive species in AOPs for the degradation of organic pollutants. Treatments were conducted with two different volumes (5 mL and 250 mL) of contaminated water samples. The data acquired allowed calculation of degradation efficiency and energy yield for both plasma sources. When treated with pin-APPJ, almost complete degradation of 5 mL DCF occurred in 1 min with the initial concentration of 25 mg/L and 50 mg/L, whereas 5 mL pCBA almost degraded in 10 min at the initial concentration of 25 mg/L and 40 mg/L. The treatment results with multi-needle electrodes system confirmed that DCF almost completely degraded in 30 min and pCBA degraded about 24 % in 50 min. The maximum calculated energy yield for 50 % removal was 6465 mg/kWh after treatment of 250 mL of DCF aqueous solution utilizing the plasma recirculation technique. The measurements also provided an insight to the kinetics of DCF and pCBA degradation. Degradation products and pathways for DCF were determined using LC-MS measurements
dc.description.sponsorship
This work was carried out under NOWELTIES project. NOWELTIES received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No. 812880. N.S., A.P., O. J. and N.P. are funded by the Ministry of Science, Techological Development and Innovation, grant number 451-03-68/2022-14/200024. This article is basedupon work from COST Action PlAgri, CA19110, supported by COST (European Cooperation in Science and Technology).
Open Access funding provided thanks to the CRUE-CSIC agreement with Elsevier
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation.isformatof
Reproducció digital del document publicat a: https://doi.org/10.1016/j.scitotenv.2022.161194
dc.relation.ispartof
Science of The Total Environment, 2023, vol. 864, art.núm. 161194
dc.relation.ispartofseries
Articles publicats (ICRA)
dc.rights
Attribution-NonCommercial 4.0 International
dc.rights.uri
dc.title
Degradation of diclofenac and 4-chlorobenzoic acid in aqueous solution by cold atmospheric plasma source
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.relation.projectID
info:eu-repo/grantAgreement/EC/H2020/812880/EU/Joint PhD Laboratory for New Materials and Inventive Water Treatment Technologies. Harnessing resources effectively through innovation/NOWELTIES
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.contributor.funder
dc.type.peerreviewed
peer-reviewed
dc.relation.FundingProgramme
dc.relation.ProjectAcronym
dc.identifier.eissn
1879-1026
dc.description.ods
6. Clean Water and Sanitation