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Visible light photocatalytic degradation of microplastic residues with zinc oxide nanorods
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering. Department of Civil and Environmental Engineering (CEE), Islamic University of Technology (IUT), Gazipur, Bangladesh.
KTH, School of Engineering Sciences (SCI), Applied Physics, Materials and Nanophysics.ORCID iD: 0000-0001-9424-6965
KTH, School of Engineering Sciences (SCI), Applied Physics.ORCID iD: 0000-0002-0074-3504
2019 (English)In: Environmental Chemistry Letters, ISSN 1610-3653, E-ISSN 1610-3661, Vol. 17, no 3, p. 1341-1346Article in journal (Refereed) Published
Abstract [en]

Microplastics have recently become a major environmental issue due to their ubiquitous distribution, uncontrolled environmental occurrences, small sizes and long lifetimes. Actual remediation methods include filtration, incineration and advanced oxidation processes such as ozonation, but those methods require high energy or generate unwanted by-products. Here we tested the degradation of fragmented, low-density polyethylene (LDPE) microplastic residues, by visible light-induced heterogeneous photocatalysis activated by zinc oxide nanorods. The reaction was monitored using Fourier-transform infrared spectroscopy, dynamic mechanical analyser and optical imaging. Results show a 30% increase of the carbonyl index of residues, and an increase of brittleness accompanied by a large number of wrinkles, cracks and cavities on the surface. The degree of oxidation was directly proportional to the catalyst surface area. A mechanism for polyethylene degradation is proposed.

Place, publisher, year, edition, pages
Springer, 2019. Vol. 17, no 3, p. 1341-1346
National Category
Nano Technology
Identifiers
URN: urn:nbn:se:kth:diva-255138DOI: 10.1007/s10311-019-00859-zISI: 000481434000013Scopus ID: 2-s2.0-85061712755OAI: oai:DiVA.org:kth-255138DiVA, id: diva2:1338458
Note

QC 20190820

Available from: 2019-07-22 Created: 2019-07-22 Last updated: 2019-09-05Bibliographically approved

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Tofa, Tajkia SyeedDutta, Joydeep

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