Microplastics (MPs), which are small plastic debris of ≤5 mm size, are polluting the oceans with negative consequences for their biota. In this work, visible-light photocatalysis of high-density polyethylene (HDPE) and low-density polyethylene (LDPE) MPs in aqueous medium using a mesoporous N-TiO2 coating is proposed as an alternative for fighting MP pollution. Spherical primary HDPE MPs were extracted from commercially available facial scrubs, while film-shaped secondary LDPE MPs were obtained from a plastic bag. For each plastic, two different sizes were tested. Degradation was measured by mass-loss and carbonyl-index (CI) calculation. The results obtained reveal that the photocatalytic degradation of HDPE and LDPE MPs using an N-TiO2 coating was affected by the size and shape of the MPs. Smaller MPs led to higher degradation, while film-shaped MPs led to lower degradation that was related to a poorly illuminated and oxygenated reaction medium. These results set the basis for further investigation on the on the design of more effective photocatalytic-reaction systems for decreasing MP inputs to the environment.

First insights into photocatalytic degradation of HDPE and LDPE microplastics by a mesoporous N-TiO2 coating: Effect of size and shape of microplastics / Llorente-Garcia, B. E.; Hernandez-Lopez, J. M.; Zaldivar-Cadena, A. A.; Siligardi, C.; Cedillo-Gonzalez, E. I.. - In: COATINGS. - ISSN 2079-6412. - 10, 658:7(2020), pp. 1-18. [10.3390/coatings10070658]

First insights into photocatalytic degradation of HDPE and LDPE microplastics by a mesoporous N-TiO2 coating: Effect of size and shape of microplastics

Siligardi C.
Supervision
;
Cedillo-Gonzalez E. I.
2020

Abstract

Microplastics (MPs), which are small plastic debris of ≤5 mm size, are polluting the oceans with negative consequences for their biota. In this work, visible-light photocatalysis of high-density polyethylene (HDPE) and low-density polyethylene (LDPE) MPs in aqueous medium using a mesoporous N-TiO2 coating is proposed as an alternative for fighting MP pollution. Spherical primary HDPE MPs were extracted from commercially available facial scrubs, while film-shaped secondary LDPE MPs were obtained from a plastic bag. For each plastic, two different sizes were tested. Degradation was measured by mass-loss and carbonyl-index (CI) calculation. The results obtained reveal that the photocatalytic degradation of HDPE and LDPE MPs using an N-TiO2 coating was affected by the size and shape of the MPs. Smaller MPs led to higher degradation, while film-shaped MPs led to lower degradation that was related to a poorly illuminated and oxygenated reaction medium. These results set the basis for further investigation on the on the design of more effective photocatalytic-reaction systems for decreasing MP inputs to the environment.
10, 658
7
1
18
First insights into photocatalytic degradation of HDPE and LDPE microplastics by a mesoporous N-TiO2 coating: Effect of size and shape of microplastics / Llorente-Garcia, B. E.; Hernandez-Lopez, J. M.; Zaldivar-Cadena, A. A.; Siligardi, C.; Cedillo-Gonzalez, E. I.. - In: COATINGS. - ISSN 2079-6412. - 10, 658:7(2020), pp. 1-18. [10.3390/coatings10070658]
Llorente-Garcia, B. E.; Hernandez-Lopez, J. M.; Zaldivar-Cadena, A. A.; Siligardi, C.; Cedillo-Gonzalez, E. I.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1210825
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