Decontamination of recycled LDPE using different washing methods
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Título: | Decontamination of recycled LDPE using different washing methods |
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Autor/es: | Nuñez, Samuel S. | Conesa, Juan A. | Moltó Berenguer, Julia | Fullana, Andres |
Grupo/s de investigación o GITE: | Residuos, Energía, Medio Ambiente y Nanotecnología (REMAN) | Ingeniería para la Economía Circular (I4CE) |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Ingeniería Química | Universidad de Alicante. Instituto Universitario de Ingeniería de los Procesos Químicos |
Palabras clave: | Dioxins | Polyethylene glycol extraction | Ultraviolet oxidation | Subcritical water extraction | Post-consumer waste | Plastic recycling |
Fecha de publicación: | 9-may-2023 |
Editor: | Elsevier |
Cita bibliográfica: | Resources, Conservation and Recycling. 2023, 195: 107017. https://doi.org/10.1016/j.resconrec.2023.107017 |
Resumen: | Post-consumer low density polyethylene samples were analysed for PAHs, PCDD/Fs and dioxin-like PCBs content. Subsequently, various treatments were applied to determine a process capable of decontaminating the plastic samples: extraction with polyethylene glycol at different temperatures with and without agitation; extraction using subcritical and hot water at different temperatures in a basic medium; compound degradation by ultraviolet radiation; and compound degradation by advanced oxidation processes using H2O2. The most effective treatment was extraction with polyethylene glycol (agitated) at 120 °C, reducing contamination by 89%, 85% and 95% of PAHs, PCDD/Fs, and dioxin-like PCBs, respectively. The least effective treatments (subcritical and hot water), maximum reductions of 47% and 19% of PAHs were obtained for the temperatures of 160 °C and 90 °C. UV oxidation increased the toxic equivalency of the samples (calculated using the toxicity equivalency factors) by up to 1400%, through the co-formation of the most toxic congeners, e.g., the non-ortho PCBs. |
Patrocinador/es: | This work was supported by the Agencia Estatal de Investigación (Spain) [grant number AEI/10.13039/501100011033], and by the University of Alicante [grant number UAUSTI21–03]. |
URI: | http://hdl.handle.net/10045/134212 |
ISSN: | 0921-3449 (Print) | 1879-0658 (Online) |
DOI: | 10.1016/j.resconrec.2023.107017 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1016/j.resconrec.2023.107017 |
Aparece en las colecciones: | INV - REMAN - Artículos de Revistas INV - I4CE - Artículos de Revistas |
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Archivo | Descripción | Tamaño | Formato | |
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Nunez_etal_2023_ResourConservRecycl.pdf | 1,54 MB | Adobe PDF | Abrir Vista previa | |
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