The ingredients of Pharmaceuticals and Personal Care Products (PPCPs) persist in water and conventional treatment plants are not able to remove them efficiently. Sonochemical treatment is insufficient to mineralize organics such as ibuprofen into CO2 and H2O. TiO2 degrades ibuprofen (IBP) under UV light; however, it does not reach a high grade of conversion. Here, we investigated the mineralization of ibuprofen to CO2 by TiO2 UV-C photocatalysis. We replaced nano-sized P25 (the standard catalyst) with a micro-sized commercial sample of TiO2 to preclude the use of nanoparticles which are dangerous for human health and because typical filtration systems are expensive and inefficient. We deposited micro-TiO2 on glass Raschig rings to ensure an easy recovery and reuse of the photocatalyst and we studied its performance both with a batch and a continuous reactor. Micro-TiO2 mineralized 100 % of IBP in 24 h. TiO2-coated glass Raschig rings degraded 87 % of IBP in 6 h of UV-C irradiation in a continuous reactor, with a mineralization of 25 %. Electronspray ionization mass spectrometer (ESI-MS, positive mode) analyses identified 13 different byproducts and we hypothised a degadration pathway for IBP degradation.

Micro-TiO2 coated glass surfaces safely abate drugs in surface water / G. Cerrato, C.L. Bianchi, F. Galli, C. Pirola, S. Morandi, V. Capucci. - In: JOURNAL OF HAZARDOUS MATERIALS. - ISSN 0304-3894. - 363(2019 Feb 05), pp. 328-334.

Micro-TiO2 coated glass surfaces safely abate drugs in surface water

C.L. Bianchi
Secondo
Project Administration
;
F. Galli
Formal Analysis
;
C. Pirola
Penultimo
Validation
;
2019

Abstract

The ingredients of Pharmaceuticals and Personal Care Products (PPCPs) persist in water and conventional treatment plants are not able to remove them efficiently. Sonochemical treatment is insufficient to mineralize organics such as ibuprofen into CO2 and H2O. TiO2 degrades ibuprofen (IBP) under UV light; however, it does not reach a high grade of conversion. Here, we investigated the mineralization of ibuprofen to CO2 by TiO2 UV-C photocatalysis. We replaced nano-sized P25 (the standard catalyst) with a micro-sized commercial sample of TiO2 to preclude the use of nanoparticles which are dangerous for human health and because typical filtration systems are expensive and inefficient. We deposited micro-TiO2 on glass Raschig rings to ensure an easy recovery and reuse of the photocatalyst and we studied its performance both with a batch and a continuous reactor. Micro-TiO2 mineralized 100 % of IBP in 24 h. TiO2-coated glass Raschig rings degraded 87 % of IBP in 6 h of UV-C irradiation in a continuous reactor, with a mineralization of 25 %. Electronspray ionization mass spectrometer (ESI-MS, positive mode) analyses identified 13 different byproducts and we hypothised a degadration pathway for IBP degradation.
Ibuprofen degradation; waste waters; continuous reactor; supported catalyst; Kronos 1077; micrometric sample
Settore CHIM/04 - Chimica Industriale
5-feb-2019
25-set-2018
Article (author)
File in questo prodotto:
File Dimensione Formato  
Micro-TiO2-coated-glass-surfaces-safely-abate-dru_2018_Journal-of-Hazardous-.pdf

Open Access dal 18/04/2020

Tipologia: Post-print, accepted manuscript ecc. (versione accettata dall'editore)
Dimensione 1.4 MB
Formato Adobe PDF
1.4 MB Adobe PDF Visualizza/Apri
214_JHazMat_TiO2coatedballs.pdf

accesso riservato

Tipologia: Publisher's version/PDF
Dimensione 2.78 MB
Formato Adobe PDF
2.78 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/592760
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 23
  • ???jsp.display-item.citation.isi??? 20
social impact