We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Sensitive quantification and morphological analysis of microfibers in laundry wastewater: Standardization and validation of a fluorescence-based method
Summary
Synthetic microfibers shed during laundry make up a large share of microplastics found in aquatic environments, but accurately counting them in wastewater has been technically inconsistent between labs. This study standardized and validated a fluorescence-based staining method for quantifying microfibers in laundry effluent, making it faster and more accessible than conventional spectroscopic approaches. A validated standard method is critical for generating comparable data across studies and informing regulations on microfiber pollution from washing machines.
Microplastics and microfibers are widespread environmental pollutants, with synthetic microfibers comprising 40-90 % of microplastics in aquatic systems. Accurate quantification is essential for assessing and mitigating their impact, but conventional methods face several challenges, including high costs, labor-intensive procedures, and limited accessibility. This study standardizes and validates a cost- and time-effective fluorescence-based method for the sensitive detection and automated quantification of polyester-based microfibers. Exploiting the fluorescence properties of polyester fibers under UV light, the method enables direct visualization and automated quantification of the fibers from images obtained using a simple camera setup through open-source software. The method was developed using synthetic, fluorescent microfiber suspensions with concentrations ranging from 1 µg/L to 125 µg/L and processed through glass-fiber filters. This procedure yielded a linear calibration curve (R² = 0.987) between the automatically computed fluorescent area on the filter surface and the mass of filtered microfibers weighted on an analytical balance. The limit of detection (LOD) and quantification (LOQ) were estimated to be 1 µg and 2.5 µg, respectively, demonstrating high sensitivity. Validation with washing machine wastewater samples showed excellent accuracy, with computed concentrations through fluorescence aligning closely with known suspension values. Additionally, the method quantified total fiber length and number, showing a strong correlation between fiber length and area. Morphological analysis revealed shorter fiber lengths in wash water samples compared to synthetic fibers with an average of 1.13 mm and 2.31 mm, respectively, likely due to fragmentation during laundering. Furthermore, washing machine wastewater samples consistently had higher fiber counts, indicating increased fragmentation. These findings highlight the method's robustness, adaptability, and potential for broad applications, allowing for both quantitative and morphological microfiber analysis in environmental and industrial settings, while also contributing to the development of future reference standards.
Sign in to start a discussion.
More Papers Like This
A novel approach for rapid quantification and length distribution of microfibers released during domestic laundry.
Researchers developed a novel rapid method for directly quantifying microfibers released during domestic laundry and deriving their length distribution density function, addressing the lack of standardized quantification approaches for this significant source of microfiber pollution.
Textile microfibers reaching aquatic environments: A new estimation approach
Researchers developed a new estimation approach for quantifying the mass flow of textile microfibers from household laundry that ultimately reaches aquatic environments, addressing the absence of accurate models for assessing microfiber contributions to microplastic pollution. The method provides a more systematic framework for estimating the environmental load from domestic washing.
Approaches for Sampling and Sample Preparation for Microplastic Analysis in Laundry Effluents
Researchers reviewed sampling and sample preparation methods for analyzing microplastics in laundry effluents. The study highlights the lack of standardized methods for quantifying textile fiber microplastics released during washing and emphasizes the need for consistent analytical approaches to better understand this significant source of microplastic pollution.
A Feasible and Efficient Monitoring Method of Synthetic Fibers Released during Textile Washing
Researchers developed and validated a feasible monitoring method for quantifying synthetic microfibers released from textiles during washing, addressing the need for standardized protocols to measure microfiber emissions. The method provided reproducible results for collecting and characterizing microfibers from wash effluent to support emission modeling.
Microplastics Shedding from Textiles—Developing Analytical Method for Measurement of Shed Material Representing Release during Domestic Washing
Researchers developed an analytical method to measure microplastic shedding from textiles during domestic washing, identifying key methodological variables that explain the large variation in shedding measurements across prior studies and proposing a standardized approach for more comparable results.