The EFSA Panel on Food Contact Materials, Enzymes and Processing Aids (CEP) assessed the safety of the recycling process EREMA (EU register number RECYC205), which uses the EREMA MPR + DS technology. The input material is hot caustic washed and dried poly(ethylene terephthalate) (PET) flakes originating from collected post-consumer PET containers, including no more than 5% PET from non-food consumer applications. The flakes are heated in a ■■■■■ reactor under vacuum before being extruded. Having examined the challenge test provided, the Panel concluded that the ■■■■■ reactor (step 2) and the extruder (step 3) are critical in determining the decontamination efficiency. The operating parameters to control the performance of these steps are temperature, pressure and residence time. It was demonstrated that this recycling process is able to ensure a level of migration of potential unknown contaminants into food below the conservatively modelled migration of 0.1 μg/kg food, derived from the exposure scenario for infants when such recycled PET is used at up to 100%. Therefore, the Panel concluded that the recycled PET obtained from this process is not considered to be of safety concern when used at up to 100% for the manufacture of materials and articles for contact with all types of foodstuffs, including drinking water, for long-term storage at room temperature. Articles made of this recycled PET are not intended to be used in microwave and conventional ovens and such uses are not covered by this evaluation.
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http://dx.doi.org/10.2903/j.efsa.2022.7379 | DOI Listing |
Sci Rep
January 2025
Department of Mechanical and Industrial Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.
To prevent water scarcity, wastewater must be discharged to the surface or groundwater after being treated. Another method is to reuse wastewater in some areas after treatment and evaluate it as much as possible. In this study, it is aimed to recover and reuse the caustic (sodium hydroxide, NaOH) used in the recycling of plastic bottles from polyethylene terephthalate (PET) washing wastewater.
View Article and Find Full Text PDFChem Commun (Camb)
January 2025
Jiangsu Key Laboratory of Function Control Technology for Advanced Materials, School of Environmental and Chemical Engineering Jiangsu Ocean University Lianyungang, Jiangsu 222005, China.
We propose an effective method for selectively extracting the valuable metals from the spent LiNiCoMnO cathode material using an oxalic acid-based deep eutectic solvent. Through regulation of the coordination environment, NiO, CoO, and MnO are stepwise separated and further applied in the electrochemical conversion of raw PET bottles to high-purity formic acid.
View Article and Find Full Text PDFJ Biomol Struct Dyn
January 2025
Enzyme and Microbial Technology Research Center, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang, Selangor, Malaysia.
The quest for sustainable solutions to plastic pollution has driven research into plastic-degrading enzymes, offering promising avenues for polymer recycling applications. However, enzymes derived from natural sources often exhibit suboptimal thermostability, hindering their industrial viability. Protein engineering techniques have emerged as a powerful approach to enhance the desired properties of these biocatalysts.
View Article and Find Full Text PDFJ Environ Manage
January 2025
National Institute for Materials Advancement, Pittsburg State University, Pittsburg, KS, 66762, USA; Department of Chemistry, Pittsburg State University, Pittsburg, KS, 66762, USA. Electronic address:
The increase in plastic waste has evolved into a severe environmental crisis, which requires innovative recycling technologies to repurpose used plastic with adequate environmental protection. This review highlights the urgent need for innovative approaches to the treatment and degradation of post-use plastics. It investigates the promising role of biofilms in the biodegradation of polymers, especially for polymers such as polyethylene terephthalate (PET), polyurethane (PU), and polyethylene (PE).
View Article and Find Full Text PDFChemistry
January 2025
Centre CEA Paris-Saclay: Commissariat a l'Energie Atomique et aux Energies Alternatives Centre de Saclay, IRAMIS Institute, CEA - Saclay, 91190, Gif-Sur-Yvette, FRANCE.
The Schwartz's reagent Cp2Zr(H)Cl is a well known stoichiometric reagent for the reduction of unsaturated organic molecules but it has rarely been used in catalytic transformations. Herein, we describe the reduction of a variety of organic carbonates using the catalyst Cp2Zr(H)Cl in combination with Me(MeO)2SiH (DMMS) as reductant. This method was further applied to the reductive depolymerization of some polycarbonate materials and yielded silylated alcohols and diols in mild conditions.
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