TY - JOUR
T1 - Degradation of Sulfamethoxazole by Double Cylindrical Dielectric Barrier Discharge System combined with Ti /C-N-TiO2 supported Nanocatalyst
AU - Massima Mouele, Emile Salomon
AU - Myint Myo, Tay Zar
AU - Kyaw, Htet Htet
AU - Tijani, Jimoh O.
AU - Dinu, Mihaela
AU - Parau, Anca C.
AU - Pana, Iulian
AU - El Ouardi, Youssef
AU - Al-Sabahi, Jamal
AU - Al-Belushi, Mohammed
AU - Sosnin, Eduard
AU - Tarasenko, Victor
AU - Zhang, Cheng
AU - Shao, Tao
AU - Iordache, Tanta Verona
AU - Teodor, Sandu
AU - Laatikainen, Katri
AU - Vladescu, Alina
AU - Al-Abri, Mohammed
AU - Sarbu, Andrei
AU - Braic, Mariana
AU - Braic, Viorel
AU - Dobretsov, Sergey
AU - Petrik, Leslie F.
N1 - Publisher Copyright:
© 2022 The Author(s)
PY - 2022/2
Y1 - 2022/2
N2 - The presence and detection of persistent pharmaceutical pollutants (PPPs) in aquatic environments requires urgent remediation. C-N-TiO2 was prepared by sol-gel method and immobilised on Ti mesh by dip-coating technique followed by pyrolysis in the furnace at 350°C for 105 minutes. The Ti/C-N-TiO2 photocatalyst were characterised by SEM, EDS, XRD, Raman spectroscopy, and XPS. An optimised DCDBD system alone or combined with Ti/C-N-TiO2 catalysts were compared for the degradation of sulfamethoxazole (SMX) simulated wastewater at the applied conditions. The SEM-EDS results showed that C, N, and Ti were all present in the C-N-TiO2 nano catalyst layer supported upon Ti mesh. XPS results revealed existence of Ti in +4 oxidation states despite the addition carbon and nitrogen. The XRD and Raman patterns confirmed the formation of anatase as dominant phase. The antibacterial tests of Ti/C-N-TiO2 films showed an excellent effect on E. coli inhibition. The degradation of SMX with DCDBD and DCDBD/C-N-TiO2/Ti-mesh systems followed first-order reaction and complete mineralisation of the pollutants was achieved after 30 and 60 min of plasma run at rate constants of 3.79×10−2 min−1 (R2 = 0.999) and 2.18×10−2 min−1 (R2 = 0.997), respectively. The energy yield G50 required for the degradation of 50% SMX reached 34.64 g/kWh corresponding to an electrical efficiency per order (EE/O) of 40.527 kWh/m3 order1 with DCDBD alone within 18 min, and 19.787 g/kWh with DCDBD/Ti/C-N-TiO2 system corresponding to an EE/O of 70.458 kWh/m3 order1 after 32 min. Different recalcitrant degradation intermediate by-products were detected by HPLC/MS and their degradation pathways proposed. Therefore, this study offers a novel advanced oxidation technology for the remediation of SMX from aqueous solution.
AB - The presence and detection of persistent pharmaceutical pollutants (PPPs) in aquatic environments requires urgent remediation. C-N-TiO2 was prepared by sol-gel method and immobilised on Ti mesh by dip-coating technique followed by pyrolysis in the furnace at 350°C for 105 minutes. The Ti/C-N-TiO2 photocatalyst were characterised by SEM, EDS, XRD, Raman spectroscopy, and XPS. An optimised DCDBD system alone or combined with Ti/C-N-TiO2 catalysts were compared for the degradation of sulfamethoxazole (SMX) simulated wastewater at the applied conditions. The SEM-EDS results showed that C, N, and Ti were all present in the C-N-TiO2 nano catalyst layer supported upon Ti mesh. XPS results revealed existence of Ti in +4 oxidation states despite the addition carbon and nitrogen. The XRD and Raman patterns confirmed the formation of anatase as dominant phase. The antibacterial tests of Ti/C-N-TiO2 films showed an excellent effect on E. coli inhibition. The degradation of SMX with DCDBD and DCDBD/C-N-TiO2/Ti-mesh systems followed first-order reaction and complete mineralisation of the pollutants was achieved after 30 and 60 min of plasma run at rate constants of 3.79×10−2 min−1 (R2 = 0.999) and 2.18×10−2 min−1 (R2 = 0.997), respectively. The energy yield G50 required for the degradation of 50% SMX reached 34.64 g/kWh corresponding to an electrical efficiency per order (EE/O) of 40.527 kWh/m3 order1 with DCDBD alone within 18 min, and 19.787 g/kWh with DCDBD/Ti/C-N-TiO2 system corresponding to an EE/O of 70.458 kWh/m3 order1 after 32 min. Different recalcitrant degradation intermediate by-products were detected by HPLC/MS and their degradation pathways proposed. Therefore, this study offers a novel advanced oxidation technology for the remediation of SMX from aqueous solution.
KW - DCDBD
KW - PPPs, photocatalyst
KW - Wastewater
KW - degradation efficiency
KW - mineralisation
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U2 - 10.1016/j.hazadv.2022.100051
DO - 10.1016/j.hazadv.2022.100051
M3 - Article
AN - SCOPUS:85140831330
SN - 2772-4166
VL - 5
JO - Journal of Hazardous Materials Advances
JF - Journal of Hazardous Materials Advances
M1 - 100051
ER -