Recovery of Waste Polyurethane from E-Waste—Part I: Investigation of the Oil Sorption Potential

The shredding of end-of-life refrigerators produces every year in Italy 15,000 tons of waste polyurethane foam (PUF), usually destined for energy recovery. This work presents the results of the investigation of the oil sorption potential of waste PUF according to ASTM F726–17 standard. Three oils (d...

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Autores principales:	Vincenzo Santucci, Silvia Fiore
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	absorption circular economy oil spill refrigerator WEEE Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/8fbe555cdb664842aeffe5e8ae712a32
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spelling	oai:doaj.org-article:8fbe555cdb664842aeffe5e8ae712a322021-11-11T17:49:27ZRecovery of Waste Polyurethane from E-Waste—Part I: Investigation of the Oil Sorption Potential10.3390/ma142162301996-1944https://doaj.org/article/8fbe555cdb664842aeffe5e8ae712a322021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6230https://doaj.org/toc/1996-1944The shredding of end-of-life refrigerators produces every year in Italy 15,000 tons of waste polyurethane foam (PUF), usually destined for energy recovery. This work presents the results of the investigation of the oil sorption potential of waste PUF according to ASTM F726–17 standard. Three oils (diesel fuel and two commercial motor oils) having different densities (respectively, 0.83, 0.87, and 0.88 kg/dm<sup>3</sup>) and viscosities (respectively, 3, 95, and 140 mm<sup>2</sup>/s at 40 °C) were considered. The waste PUF was sampled in an Italian e-waste treatment plant, and its characterization showed 16.5 wt% particles below 0.71 mm and 13 wt% impurities (paper, plastic, aluminum foil), mostly having dimensions (d) above 5 mm. Sieving at 0.071 mm was applied to the waste PUF to obtain a “coarse” (d > 0.71 mm) and a “fine” fraction (d < 0.71 mm). Second sieving at 5 mm allowed an “intermediate” fraction to be obtained, with dimensions between 0.71 and 5 mm. The oil sorption tests involved the three fractions of waste PUF, and their performances were compared with two commercial oil sorbents (sepiolite and OKO-PUR). The results of the tests showed that the “fine” PUF was able to retain 7.1–10.3 g oil/g, the “intermediate” PUF, 4.2–7.4 g oil/g, and the “coarse” PUF, 4.5–7.0 g oil/g, while sepiolite and OKO-PUR performed worse (respectively, 1.3–1.6 and 3.3–5.3 g oil/g). In conclusion, compared with the actual management of waste PUF (100 wt% sent to energy recovery), the amount destined directly to energy recovery could be limited to 13 wt% (i.e., the impurities). The remaining 87 wt% could be diverted to reuse for oil sorption, and afterward directed to energy recovery, considered as a secondary option.Vincenzo SantucciSilvia FioreMDPI AGarticleabsorptioncircular economyoil spillrefrigeratorWEEETechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6230, p 6230 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	absorption circular economy oil spill refrigerator WEEE Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	absorption circular economy oil spill refrigerator WEEE Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Vincenzo Santucci Silvia Fiore Recovery of Waste Polyurethane from E-Waste—Part I: Investigation of the Oil Sorption Potential
description	The shredding of end-of-life refrigerators produces every year in Italy 15,000 tons of waste polyurethane foam (PUF), usually destined for energy recovery. This work presents the results of the investigation of the oil sorption potential of waste PUF according to ASTM F726–17 standard. Three oils (diesel fuel and two commercial motor oils) having different densities (respectively, 0.83, 0.87, and 0.88 kg/dm<sup>3</sup>) and viscosities (respectively, 3, 95, and 140 mm<sup>2</sup>/s at 40 °C) were considered. The waste PUF was sampled in an Italian e-waste treatment plant, and its characterization showed 16.5 wt% particles below 0.71 mm and 13 wt% impurities (paper, plastic, aluminum foil), mostly having dimensions (d) above 5 mm. Sieving at 0.071 mm was applied to the waste PUF to obtain a “coarse” (d > 0.71 mm) and a “fine” fraction (d < 0.71 mm). Second sieving at 5 mm allowed an “intermediate” fraction to be obtained, with dimensions between 0.71 and 5 mm. The oil sorption tests involved the three fractions of waste PUF, and their performances were compared with two commercial oil sorbents (sepiolite and OKO-PUR). The results of the tests showed that the “fine” PUF was able to retain 7.1–10.3 g oil/g, the “intermediate” PUF, 4.2–7.4 g oil/g, and the “coarse” PUF, 4.5–7.0 g oil/g, while sepiolite and OKO-PUR performed worse (respectively, 1.3–1.6 and 3.3–5.3 g oil/g). In conclusion, compared with the actual management of waste PUF (100 wt% sent to energy recovery), the amount destined directly to energy recovery could be limited to 13 wt% (i.e., the impurities). The remaining 87 wt% could be diverted to reuse for oil sorption, and afterward directed to energy recovery, considered as a secondary option.
format	article
author	Vincenzo Santucci Silvia Fiore
author_facet	Vincenzo Santucci Silvia Fiore
author_sort	Vincenzo Santucci
title	Recovery of Waste Polyurethane from E-Waste—Part I: Investigation of the Oil Sorption Potential
title_short	Recovery of Waste Polyurethane from E-Waste—Part I: Investigation of the Oil Sorption Potential
title_full	Recovery of Waste Polyurethane from E-Waste—Part I: Investigation of the Oil Sorption Potential
title_fullStr	Recovery of Waste Polyurethane from E-Waste—Part I: Investigation of the Oil Sorption Potential
title_full_unstemmed	Recovery of Waste Polyurethane from E-Waste—Part I: Investigation of the Oil Sorption Potential
title_sort	recovery of waste polyurethane from e-waste—part i: investigation of the oil sorption potential
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8fbe555cdb664842aeffe5e8ae712a32
work_keys_str_mv	AT vincenzosantucci recoveryofwastepolyurethanefromewastepartiinvestigationoftheoilsorptionpotential AT silviafiore recoveryofwastepolyurethanefromewastepartiinvestigationoftheoilsorptionpotential
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Recovery of Waste Polyurethane from E-Waste—Part I: Investigation of the Oil Sorption Potential

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