Synthesis of low-density polyethylene derived carbon nanotubes for activation of persulfate and degradation of water organic micropollutants in continuous mode

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Rui S. Ribeiro (Author) FEUP; Octávia Vieira (Author) Other; Rita Fernandes (Author) FEUP; Fernada F. Roman (Author) Other; Jose L. Diaz de Tuesta (Author) Other; Adrián M. T. Silva (Author) FEUP; Helder T. Gomes (Author) Other

Journal

Title: Journal of Environmental Management

Vol. 308 No. 114622

Pages: 1-10

ISSN: 0301-4797

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Associated Projects

PLASTIC_TO_FUEL&MAT - Upcycling Waste Plastics into Fuel and Carbon Nanomaterials

InSpeCt - Identifying and interrupting micropollutants of EU concern by using Smart Carbon materials

Healthy Waters - Healthy Waters - Identification, Elimination, Social Awareness and Education of Water Chemical and Biological Micropollutants with Health and Environmental Implications

Other information

Authenticus ID: P-00W-1EK

DOI: 10.1016/j.jenvman.2022.114622

Abstract (EN): Plastic derived carbon nanotubes (CNTs) were tested as catalysts in persulfate activation for the first time. Four catalysts were prepared by wetness impregnation and co-precipitation (using Al2O3, Ni, Fe and/or Al) and implemented to grow CNTs by chemical vapour deposition (CVD) using low-density polyethylene (LDPE) as carbon feedstock. A catalyst screening was performed in batch mode and the best performing CNTs (CNT@Ni+Fe/Al2O3-cp) led to a high venlafaxine mass removal rate (3.17 mg g-1 h-1) in ultrapure water after 90 min (even with a mixture of micropollutants). Its degradation increased when the matrix was replaced by drinking water and negligibly affected in surface water. A composite polymeric membrane was then fabricated with CNT@Ni+Fe/Al2O3-cp and polyvinylidene fluoride (PVDF), a high venlafaxine mass removal rate in surface water being also observed in 24 h of continuous operation. Therefore, the results herein reported open a window of opportunity for the valorisation of plastic wastes in this catalytic application performed in continuous mode.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10