Degradation of diclofenac and 4-chlorobenzoic acid in aqueous solution by cold atmospheric plasma source
2023
Аутори:
Kumar, AmitŠkoro, Nikola
Gernjak, Wolfgang
Jovanović, Olivera
Petrović, Anđelija
Živković, Suzana
Lumbaque, Elisabeth Cuervo
Farré, Maria José
Puač, Nevena
Тип документа:
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт:
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.
Кључне речи:
Cold atmospheric plasma; Degradation of pharmaceutical and industrial chemi; Plasma characterizationИзвор:
Science of The Total Environment, 2023, 864, 161194-Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200024 (Универзитет у Београду, Институт за физику, Београд-Земун) (RS-MESTD-inst-2020-200024)
- NOWELTIES - Joint PhD Laboratory for New Materials and Inventive Water Treatment Technologies. Harnessing resources effectively through innovation (EU-H2020-812880)
DOI: 10.1016/j.scitotenv.2022.161194
ISSN: 0048-9697
PubMed: 36581289
WoS: 000917477100001
Scopus: 2-s2.0-85144819324
URI
https://linkinghub.elsevier.com/retrieve/pii/S0048969722082985http://radar.ibiss.bg.ac.rs/handle/123456789/5355