Natural depolymerization of waste poly(ethylene terephthalate) by neutral hydrolysis in marine water

Abstract Polyethylene terephthalate (PET) is one of the most widely used materials for food packaging and fishing nets. After use it become waste and, due to poor collection, most will be found floating in marine waters. This paper presents the results of a study of PET depolymerization by hydrolysi...

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Autores principales:	Dorin Stanica-Ezeanu, Danuta Matei
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b4ce2d808c1f4dc7aa0d763ed39e9f24
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spelling	oai:doaj.org-article:b4ce2d808c1f4dc7aa0d763ed39e9f242021-12-02T13:19:30ZNatural depolymerization of waste poly(ethylene terephthalate) by neutral hydrolysis in marine water10.1038/s41598-021-83659-22045-2322https://doaj.org/article/b4ce2d808c1f4dc7aa0d763ed39e9f242021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83659-2https://doaj.org/toc/2045-2322Abstract Polyethylene terephthalate (PET) is one of the most widely used materials for food packaging and fishing nets. After use it become waste and, due to poor collection, most will be found floating in marine waters. This paper presents the results of a study of PET depolymerization by hydrolysis. We observed that marine water is a perfect reactant because it contains a multitude of metal ions that act as catalysts. A first-order kinetic model was developed and experimental data fitted to it. An activation energy of 73.5 kJ/mole and a pre-exponential factor of 5.33 × 107 h–1 were obtained. Considering that the global ocean is a huge batch reactor operating under isothermal conditions, the solution of the mathematical model shows that in tropical regions only 72 years is needed for total and only 4.5 years for 50% PET conversion.Dorin Stanica-EzeanuDanuta MateiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Dorin Stanica-Ezeanu Danuta Matei Natural depolymerization of waste poly(ethylene terephthalate) by neutral hydrolysis in marine water
description	Abstract Polyethylene terephthalate (PET) is one of the most widely used materials for food packaging and fishing nets. After use it become waste and, due to poor collection, most will be found floating in marine waters. This paper presents the results of a study of PET depolymerization by hydrolysis. We observed that marine water is a perfect reactant because it contains a multitude of metal ions that act as catalysts. A first-order kinetic model was developed and experimental data fitted to it. An activation energy of 73.5 kJ/mole and a pre-exponential factor of 5.33 × 107 h–1 were obtained. Considering that the global ocean is a huge batch reactor operating under isothermal conditions, the solution of the mathematical model shows that in tropical regions only 72 years is needed for total and only 4.5 years for 50% PET conversion.
format	article
author	Dorin Stanica-Ezeanu Danuta Matei
author_facet	Dorin Stanica-Ezeanu Danuta Matei
author_sort	Dorin Stanica-Ezeanu
title	Natural depolymerization of waste poly(ethylene terephthalate) by neutral hydrolysis in marine water
title_short	Natural depolymerization of waste poly(ethylene terephthalate) by neutral hydrolysis in marine water
title_full	Natural depolymerization of waste poly(ethylene terephthalate) by neutral hydrolysis in marine water
title_fullStr	Natural depolymerization of waste poly(ethylene terephthalate) by neutral hydrolysis in marine water
title_full_unstemmed	Natural depolymerization of waste poly(ethylene terephthalate) by neutral hydrolysis in marine water
title_sort	natural depolymerization of waste poly(ethylene terephthalate) by neutral hydrolysis in marine water
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b4ce2d808c1f4dc7aa0d763ed39e9f24
work_keys_str_mv	AT dorinstanicaezeanu naturaldepolymerizationofwastepolyethyleneterephthalatebyneutralhydrolysisinmarinewater AT danutamatei naturaldepolymerizationofwastepolyethyleneterephthalatebyneutralhydrolysisinmarinewater
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Natural depolymerization of waste poly(ethylene terephthalate) by neutral hydrolysis in marine water

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