{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,23]],"date-time":"2026-08-23T14:41:31Z","timestamp":1787496091849,"version":"build-2736575974"},"reference-count":56,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2026,6,9]],"date-time":"2026-06-09T00:00:00Z","timestamp":1780963200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Residual volatile organic compounds (VOCs) and non-intentionally added substances (NIASs) limit the reuse of post-consumer recycled high-density polyethylene (rHDPE) in high-value applications because they generate persistent odors and may compromise product quality and regulatory acceptance. This work comparatively assesses five deodorization and purification routes for rHDPE: agitation washing, ultrasound-assisted washing, reflux heating, Soxhlet extraction, and dissolution\/precipitation, by combining VOC removal performance, material characterization, and techno-economic evaluation. Ultrasound-assisted washing with SDS achieved ~96% total VOC removal, while reflux heating resulted in near-complete removal (~98%), approaching the analytical detection limit. Soxhlet extraction with ethanol reached 94% after 1 h, and the dissolution\/precipitation method provided near-complete purification and removed additional impurities, but at the expense of substantially higher process complexity and cost. Mechanical and physicochemical characterization indicated that the evaluated treatments did not appreciably compromise the measured properties of the recycled polymer. In addition, equilibrium screening with representative analytes in ethanol provided qualitative support for the solvent\u2013polymer interaction discussion. A plant-scale techno-economic assessment identified ultrasound-assisted SDS washing as the most attractive option, offering the best balance between deodorization efficiency, process simplicity, and cost. Overall, the results provide a practical basis for selecting scalable decontamination strategies to upgrade rHDPE quality and expand its use in circular plastic applications.<\/jats:p>","DOI":"10.3390\/polym18121441","type":"journal-article","created":{"date-parts":[[2026,6,10]],"date-time":"2026-06-10T00:58:12Z","timestamp":1781053092000},"page":"1441","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Deodorization of Recycled HDPE: Comparative Assessment of Washing and Solvent-Based Purification Strategies with a Techno-Economic Analysis"],"prefix":"10.3390","volume":"18","author":[{"given":"Aymara","family":"Blanco","sequence":"first","affiliation":[{"name":"Polymer Technology Laboratory (LATEP), Rey Juan Carlos University, Tulip\u00e1n St., 28933 M\u00f3stoles, Madrid, Spain"},{"name":"GIQA, Group of Environmental and Chemical Engineering, ESCET, Rey Juan Carlos University, Tulip\u00e1n St., 28933 M\u00f3stoles, Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vafa","family":"Feyzi","sequence":"additional","affiliation":[{"name":"Systems Analysis Unit, IMDEA Energy, Avda. Ram\u00f3n de la Sagra 3, 28935 M\u00f3stoles, Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7818-3415","authenticated-orcid":false,"given":"Rafael","family":"Juan","sequence":"additional","affiliation":[{"name":"Polymer Technology Laboratory (LATEP), Rey Juan Carlos University, Tulip\u00e1n St., 28933 M\u00f3stoles, Madrid, Spain"},{"name":"GIQA, Group of Environmental and Chemical Engineering, ESCET, Rey Juan Carlos University, Tulip\u00e1n St., 28933 M\u00f3stoles, Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8879-1884","authenticated-orcid":false,"given":"Beatriz","family":"Paredes","sequence":"additional","affiliation":[{"name":"Polymer Technology Laboratory (LATEP), Rey Juan Carlos University, Tulip\u00e1n St., 28933 M\u00f3stoles, Madrid, Spain"},{"name":"GIQA, Group of Environmental and Chemical Engineering, ESCET, Rey Juan Carlos University, Tulip\u00e1n St., 28933 M\u00f3stoles, Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carlos","family":"Dom\u00ednguez","sequence":"additional","affiliation":[{"name":"Polymer Technology Laboratory (LATEP), Rey Juan Carlos University, Tulip\u00e1n St., 28933 M\u00f3stoles, Madrid, Spain"},{"name":"GIQA, Group of Environmental and Chemical Engineering, ESCET, Rey Juan Carlos University, Tulip\u00e1n St., 28933 M\u00f3stoles, Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Javier","family":"Dufour","sequence":"additional","affiliation":[{"name":"GIQA, Group of Environmental and Chemical Engineering, ESCET, Rey Juan Carlos University, Tulip\u00e1n St., 28933 M\u00f3stoles, Madrid, Spain"},{"name":"Systems Analysis Unit, IMDEA Energy, Avda. Ram\u00f3n de la Sagra 3, 28935 M\u00f3stoles, Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9091-8733","authenticated-orcid":false,"given":"Rafael A.","family":"Garc\u00eda-Mu\u00f1oz","sequence":"additional","affiliation":[{"name":"Polymer Technology Laboratory (LATEP), Rey Juan Carlos University, Tulip\u00e1n St., 28933 M\u00f3stoles, Madrid, Spain"},{"name":"GIQA, Group of Environmental and Chemical Engineering, ESCET, Rey Juan Carlos University, Tulip\u00e1n St., 28933 M\u00f3stoles, Madrid, Spain"},{"name":"Instituto de Investigaci\u00f3n de Tecnolog\u00edas para la Sostenibilidad, Rey Juan Carlos University, Tulip\u00e1n St., 28933 M\u00f3stoles, Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,6,9]]},"reference":[{"key":"ref_1","unstructured":"(2025, July 11). Plastics Europe Plastics\u2014The Fast Facts 2024. 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