Application of BiOClnBrm photocatalyst to cytostatic drugs removal from water; mechanism and toxicity assessment - Publikacja - MOST Wiedzy

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Application of BiOClnBrm photocatalyst to cytostatic drugs removal from water; mechanism and toxicity assessment

Abstrakt

The photocatalytic activity of series of BiOClnBrm photocatalysts toward degradation and mineralization of the cytostatic drugs 5-fluorouracil (5-FU) and imatinib mesylate (IMA) both singly and in their mixture under simulated solar and visible light irradiation has been investigated. Screening test revealed that among BiOClnBrm photocatalysts synthesized by a solvothermal method, the one with molar 1.3Cl/0.7Br ratio was the most efficient in 5-FU removal under UV-Vis irradiation. The dose 200 mg L-1 and 6.3 pH were optimal to effective removal of 5-FU. The BiOCl1.3Br0.7 was successfully used to 5-FU and IMA removal singly and in their mixture under simulated solar and visible light irradiation. Scavenging experiments showed that h+ and •O2- were the major oxidative species participated in both drugs degradation. In presence of IMA, 5-FU removal was significantly depressed. In singly drug solutions and in the mixture of drugs, the presence of inorganic ions such as Cl−, SO42−, and NO3- significantly hindered 5-FU photocatalytic degradation, and increased the adsorption of IMA onto the photocatalyst surface in dark phase. The HCO3− anion, Fe3+ and Ag+ cations accelerated the 5-FU removal, while Ca2+ showed no impact on the process. The transformation products of 5-FU and IMA were identified by LC-MS revealing that hydroxylation and oxidation were the main transformation pathways, under the all studied systems. Some of intermediates were indicated for the first time in heterogeneous photocatalysis. The defluorination of 5-FU by the reaction with photogenerated e- was also possible. Furthermore, the alga toxicity assay was investigated using Chlorella vulgaris. A reduction of toxicity in effluents after photocatalytic degradation of both drugs singly and in their mixture was observed.

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
SEPARATION AND PURIFICATION TECHNOLOGY nr 254,
ISSN: 1383-5866
Język:
angielski
Rok wydania:
2020
Opis bibliograficzny:
Wilczewska P., Ona A., Bielicka-Giełdoń A., Malankowska A., Tabaka K., Ryl J., Pniewski F., Siedlecka E.: Application of BiOClnBrm photocatalyst to cytostatic drugs removal from water; mechanism and toxicity assessment// SEPARATION AND PURIFICATION TECHNOLOGY -Vol. 254, (2020), s.117601-
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.seppur.2020.117601
Weryfikacja:
Politechnika Gdańska

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