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Photodegradation using TiO2-activated borosilicate tubes.
Environ Sci Pollut Res Int. 2019 Jul; 26(19):19025-19034.ES

Abstract

This study examines the photocatalytic activity of titanium dioxide (TiO2) semiconductor supported on borosilicate tubes (cut-off 290 nm) towards removal of a mix of persistent organic pollutants (POPs) from water. For this purpose, two widely used analgesic and anti-inflammatory drugs (NSAIDs), ibuprofen (IBU) and mefenamic acid, along with MCPA sodium monohydrate, which is a common herbicide frequently used in the agricultural activities, were selected as a case study. Borosilicate tubes were coated with titanium oxide through two different approaches: sol-gel dip-coating and a hybrid nanoparticle dip-coating and plasma-enhanced chemical vapour deposition (PECVD) process. The photochemical reactor that hosts the titania-coated tubes was designed to permit continuous throughput of liquid feed stream. The photodegradation experiments were performed in laboratory conditions under artificial irradiation simulating solar light. The efficiency of direct photolysis and heterogeneous photocatalysis (TiO2) was investigated, and the performance of each coating method was evaluated. Kinetic studies for each experiment were accomplished, the overall results showed poor efficiency and insufficient removal for NSAIDs through direct photolysis, whereas applying heterogeneous photacatalysis with TiO2 coated on borosilicate tubes was found to accelerate their degradation rate with complete decomposition. Concomitantly, kinetic experimental results showed a critical difference of performance for the two coating methods used; in particular, the degradation rates of pollutants by the sol-gel-coated tubes were much faster than the degradation by the nanoparticle/PECVD-coated tubes. Using TiO2 supported on borosilicate tubes appears to be a promising alternative to conventional TiO2 suspension and avoid post-separation stages. The results achieved in this study can be used to optimise large-scale applications, and expanding the study to cover a wide range of pollutants will lead to achieve more representative results.

Authors+Show Affiliations

Department of Science, University of Basilicata, 85100, Potenza, Italy. skhalaf@staff.alquds.edu. Soil and Hydrology Research Lab (SHR), Department of Earth and Environmental Sciences, Al-Quds University, Jerusalem, Palestine. skhalaf@staff.alquds.edu.Soil and Hydrology Research Lab (SHR), Department of Earth and Environmental Sciences, Al-Quds University, Jerusalem, Palestine.Department of European Cultures (DICEM), University of Basilicata, 85100, Potenza, Italy.Department of Bioorganic Chemistry, Faculty of Pharmacy, Al-Quds University, Jerusalem, 20002, Palestine.Department of Science, University of Basilicata, 85100, Potenza, Italy.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30117024

Citation

Khalaf, Samer, et al. "Photodegradation Using TiO2-activated Borosilicate Tubes." Environmental Science and Pollution Research International, vol. 26, no. 19, 2019, pp. 19025-19034.
Khalaf S, Shoqeir JH, Scrano L, et al. Photodegradation using TiO2-activated borosilicate tubes. Environ Sci Pollut Res Int. 2019;26(19):19025-19034.
Khalaf, S., Shoqeir, J. H., Scrano, L., Karaman, R., & Bufo, S. A. (2019). Photodegradation using TiO2-activated borosilicate tubes. Environmental Science and Pollution Research International, 26(19), 19025-19034. https://doi.org/10.1007/s11356-018-2858-5
Khalaf S, et al. Photodegradation Using TiO2-activated Borosilicate Tubes. Environ Sci Pollut Res Int. 2019;26(19):19025-19034. PubMed PMID: 30117024.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photodegradation using TiO2-activated borosilicate tubes. AU - Khalaf,Samer, AU - Shoqeir,Jawad H, AU - Scrano,Laura, AU - Karaman,Rafik, AU - Bufo,Sabino A, Y1 - 2018/08/16/ PY - 2018/01/26/received PY - 2018/07/26/accepted PY - 2018/8/18/pubmed PY - 2019/8/29/medline PY - 2018/8/18/entrez KW - AOPs KW - Borosilicate tubes KW - Emerging contaminants KW - Ibuprofen KW - MCPA KW - Mefenamic acid KW - PECVD KW - Photo-degradation KW - Photocatalysis KW - Sol-gel coating KW - TiO2 KW - Wastewater SP - 19025 EP - 19034 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 26 IS - 19 N2 - This study examines the photocatalytic activity of titanium dioxide (TiO2) semiconductor supported on borosilicate tubes (cut-off 290 nm) towards removal of a mix of persistent organic pollutants (POPs) from water. For this purpose, two widely used analgesic and anti-inflammatory drugs (NSAIDs), ibuprofen (IBU) and mefenamic acid, along with MCPA sodium monohydrate, which is a common herbicide frequently used in the agricultural activities, were selected as a case study. Borosilicate tubes were coated with titanium oxide through two different approaches: sol-gel dip-coating and a hybrid nanoparticle dip-coating and plasma-enhanced chemical vapour deposition (PECVD) process. The photochemical reactor that hosts the titania-coated tubes was designed to permit continuous throughput of liquid feed stream. The photodegradation experiments were performed in laboratory conditions under artificial irradiation simulating solar light. The efficiency of direct photolysis and heterogeneous photocatalysis (TiO2) was investigated, and the performance of each coating method was evaluated. Kinetic studies for each experiment were accomplished, the overall results showed poor efficiency and insufficient removal for NSAIDs through direct photolysis, whereas applying heterogeneous photacatalysis with TiO2 coated on borosilicate tubes was found to accelerate their degradation rate with complete decomposition. Concomitantly, kinetic experimental results showed a critical difference of performance for the two coating methods used; in particular, the degradation rates of pollutants by the sol-gel-coated tubes were much faster than the degradation by the nanoparticle/PECVD-coated tubes. Using TiO2 supported on borosilicate tubes appears to be a promising alternative to conventional TiO2 suspension and avoid post-separation stages. The results achieved in this study can be used to optimise large-scale applications, and expanding the study to cover a wide range of pollutants will lead to achieve more representative results. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/30117024/Photodegradation_using_TiO2_activated_borosilicate_tubes_ L2 - https://dx.doi.org/10.1007/s11356-018-2858-5 DB - PRIME DP - Unbound Medicine ER -