A novel method for purification, quantitative analysis and characterization of microplastic fibers using Micro-FTIR

Area of Science:

• Environmental Science
• Analytical Chemistry
• Materials Science

Background:

• Microplastic fibers from washing synthetic textiles are a significant environmental pollutant in aquatic ecosystems.
• Existing methods for microplastic fiber analysis are limited in quantification and polymer identification.

Purpose of the Study:

• To develop a novel, robust method for quantifying and identifying microplastic fibers in laundry effluent.
• To assess the release of microplastic fibers during household washing of synthetic fabrics.

Main Methods:

• Simulated washing of synthetic fabrics using commercial detergents.
• Filtration of effluent using GF/F (0.7 μm) and Anodisc (0.2 μm) filters to capture small fibers.
• Analysis of filtered fibers using Micro-Fourier Transform Infrared Spectroscopy (Micro-FTIR) for polymer identification and Scanning Electron Microscopy (SEM) for morphological confirmation.

Main Results:

• A novel purification procedure for effluent was successfully developed.
• The Micro-FTIR method achieved optimal polymer identification matches with an average of 80%.
• SEM analysis confirmed fiber dimensions, validating the filtration efficiency for small fibers.

Conclusions:

• The developed method provides accurate quantification and identification of microplastic fibers from laundry.
• This technique offers a significant advancement in monitoring and understanding microplastic pollution from textiles.
• The method is robust, replicable, and suitable for environmental monitoring and research.