Immobilization of PETase enzymes on magnetic iron oxide nanoparticles for the decomposition of microplastic PET
Sebastian P. Schwaminger, Stefan Fehn, Tobias Steegmüller, Stefan Rauwolf, Hannes Löwe, Katharina Pflüger‐Grau, Sonja Berensmeier
Abstract
Polyethylene terephthalate (PET) is responsible for a large amount of environmental contamination with microplastics. Based on its high affinity, the PET degrading enzyme PETase can be immobilized on superparamagnetic iron oxide nanoparticles through a His-tag. The His-tag increases enzyme stability, and allows magnetic separation for recovery. Multiple recycling steps are possible and microplastic particles can be decomposed depending on the PET's crystallinity. The separation or decomposition of PET allows for a sustainable way to remove microplastic from water.
Topics & Concepts
MicroplasticsPolyethylene terephthalateDecompositionCrystallinitySuperparamagnetismNanoparticleMagnetic nanoparticlesIron oxide nanoparticlesIron oxideChemical engineeringMaterials scienceMagnetic separationChemistryEnvironmental chemistryNanotechnologyOrganic chemistryMetallurgyComposite materialMagnetizationMagnetic fieldEngineeringPhysicsQuantum mechanicsMicroplastics and Plastic PollutionRecycling and Waste Management TechniquesGraphene and Nanomaterials Applications