Low Carbon Footprint Recycling of Post‐Consumer PET Plastic with a Metagenomic Polyester Hydrolase
| Autor: | Ronny Frank, Philipp Konstantin Richter, César A. Ramírez-Sarmiento, Ziyue Zhao, Yuliia Lihanova, Christian Sonnendecker, Susan Billig, Patrick Hille, Cornelius Fischer, Thorsten Oeser, Bernd Abel, Paula Blázquez-Sánchez, Felipe Engelberger, Norbert Sträter, Wolfgang Zimmermann, Jörg Matysik, Heinz-Georg Jahnke, Juliane Oeser, Holger Lippold |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Terephthalic acid Hydrolases Polyethylene Terephthalates General Chemical Engineering Polymer Hydrolysate Polyester chemistry.chemical_compound Hydrolysis General Energy chemistry Hydrolase ddc:540 Polyethylene terephthalate Environmental Chemistry Degradation (geology) Metagenome General Materials Science Recycling Plastics Nuclear chemistry Carbon Footprint |
| Zdroj: | ChemSusChem 15(9), e202101062 (2021). doi:10.1002/cssc.202101062 |
| DOI: | 10.1002/cssc.202101062 |
| Popis: | ChemSusChem xx, 1-11 (2021). doi:10.1002/cssc.202101062 Our planet is flooded with plastics and the need for sustainable recycling strategies of polymers has become increasingly urgent. Enzyme-based hydrolysis of post-consumer plastic is an emerging strategy for closed-loop recycling of polyethylene terephthalate (PET). The polyester hydrolase PHL7 isolated from a compost metagenome completely hydrolyzed amorphous PET films, releasing 91 mg of terephthalic acid per hour and mg of enzyme. Degradation rates of the PET film of 6.8 ��m h -1 were monitored by vertical scanning interferometry. Structural analysis indicated the importance of leucine at position 210 for the extraordinarily high PET-hydrolyzing activity of PHL7. Within 24 h, 0.6 mg enzyme g PET -1 completely degraded post-consumer thermoform PET packaging in an aqueous buffer at 70��C without any energy-intensive pretreatments. Terephthalic acid recovered from the enzymatic hydrolysate was used to synthesize virgin PET, demonstrating the potential of polyester hydrolases as catalysts in sustainable PET recycling processes with a low carbon footprint. Published by Wiley-VCH, Weinheim |
| Databáze: | OpenAIRE |
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