We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Identification of Multilayer Packaging Materials by Selective Dissolution and Precipitation With Minimal Concentration of Solvents, FTIR , and DSC for Mechanical Recycling
AI summary Read the abstract
This study examined microplastic contamination in freshwater fish from rivers receiving agricultural drainage, comparing plastic loads in fish from impacted versus reference sites. The findings link agricultural microplastic inputs to elevated contamination in freshwater fish, with implications for freshwater food web integrity.
ABSTRACT Environmental problems related to waste accumulation have encouraged recycling, especially of polymers, such as multilayer packaging, which is hardly recycled because it consists of distinct materials in each layer. Furthermore, knowing the polymers that compose the films is essential to make their recycling feasible. The purpose of this work was to identify the polymers that compose three different post‐consumer multilayer packaging films by the techniques of selective dissolution and precipitation in a system of solvent‐nonsolvent composed of toluene‐acetone, Fourier transformed infrared spectroscopy (FTIR), and differential scanning calorimetry (DSC). Selective dissolution suggested the presence of 1.5–11 wt% of ethylene vinyl alcohol copolymer (EVOH), polyamide (PA), poly(ethylene terephthalate) (PET), and/or poly(vinyl chloride) (PVC), and 77–93.5 wt% of ethylene vinyl acetate copolymer (EVA), polyethylene (PE), and/or polypropylene (PP) in the packaging films. FTIR spectra showed characteristic absorption bands of EVA, EVOH, PE, PET, and PA, whereas DSC curves indicated the presence of high density polyethylene (HDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), modified PE, EVOH, and PA, which were assumed to be the constituents of the films. These results proved that the techniques selected to analyze the films were suitable and produced valuable information for the recycling of these materials.
More Papers Like This
ATR-FTIR Spectroscopy Combined with Chemometric Methods for the Classification of Polyethylene Residues Containing Different Contaminants
AI summary Read the abstract
Researchers combined ATR-FTIR spectroscopy with chemometric methods to classify polyethylene residues containing different types of contaminants. The approach successfully distinguished between contaminated and uncontaminated low- and high-density polyethylene, offering potential for improving plastic recycling quality control.
ATR-FTIR Spectroscopy Combined with Chemometric Methods for the Classification of Polyethylene Residues Containing Different Contaminants
AI summary Read the abstract
ATR-FTIR spectroscopy combined with chemometric modeling was evaluated for classifying and quantifying HDPE and LDPE plastic waste mixtures, with interval partial least squares regression outperforming other methods for predicting blend composition even in the presence of contaminants. Improved plastic identification tools are essential for effective recycling and for understanding the polymer composition of environmental microplastics.
Characterization of microplastics from beach sediment
AI summary Read the abstract
This Croatian thesis characterized microplastic particles from five common plastic types (PET, HDPE, LDPE, PS, PP) degraded from seven types of packaging, using FTIR spectroscopy for polymer identification. The work contributes to developing standardized methods for identifying and characterizing microplastic pollution from consumer packaging materials.
In situ dissolved polypropylene prediction by Raman and ATR-IR spectroscopy for its recycling
AI summary Read the abstract
Researchers developed in situ spectroscopic methods using Raman and ATR-IR spectroscopy to monitor the dissolution of polypropylene during recycling processes, finding that Raman spectroscopy provided superior concentration predictions and enabled real-time optimization of solvent type, temperature, and polymer form.
Screening Green Solvents for Multilayer Plastic Film Recycling Processes
AI summary Read the abstract
Researchers developed biochar-based composite materials for microplastic removal from wastewater, testing different biochar feedstocks and activation treatments for adsorption capacity. Activated biochar composites achieved substantially higher microplastic removal than unmodified biochar, with removal efficiency dependent on surface functional group chemistry and particle-material electrostatic interactions.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.