A new microfluidic device from KRICT and CNU extracts pollutants like PFAS directly from soil and water without needing complex filtration.
Researchers have engineered a microfluidic device that extracts pollutants directly from contaminated solids. This breakthrough eliminates the need for complex filtration in environmental testing.The joint team from the Korea Research Institute of Chemical Technology and Chungnam National University published their findings in ACS Sensors.
Led by Dr. Ju Hyeon Kim and Professor Jae Bem You, the group solved a long-standing hurdle in analytical chemistry.Standard water and food testing often fails when sand, soil, or food residues are present. These solids decrease accuracy and trap trace pollutants during the filtration process.Current analytical approaches follow a rigid, multistep workflow including solid removal, extraction, and analysis. This path increases time and costs while reducing reliability.These limitations pose significant challenges in fields closely related to public health. This includes environmental monitoring and drinking water safety.Solving filtration problemTraditional methods rely on liquid-liquid extraction to find hazardous contaminants. These processes require massive amounts of solvents and are difficult to automate.While liquid-liquid microextraction exists, its practical application remained limited. Samples containing solid particles still require a filtration step prior to extraction.The new microfluidic-based analytical device uses a trap-based design to bypass these hurdles. It confines a tiny extractant droplet inside a specific microchamber. Meanwhile, the sample solution flows through an adjacent microchannel.This allows target analytes to move into the extractant while solid particles pass by. The design enables rapid and selective mass transfer without any interference from the grit. After extraction, the researcher simply retrieves the droplet for downstream analysis.Testing real-world samplesThe team tested the device on perfluorooctanoic acid and the drug carbamazepine . PFOA belongs to the PFAS family of “forever chemicals” currently facing strict U.S. regulations. The device detected PFOA signals in under five minutes. Researchers also extracted CBZ from sand-containing slurry without any prior filtration.They identified the compound clearly using high-performance liquid chromatography . The results show the platform maintains high reliability while slashing the number of necessary steps.This makes it a prime candidate for compact, automated monitoring systems. It offers a scalable solution for food safety inspection and pharmaceutical residue analysis.The system handles complex mixtures that would typically clog standard laboratory equipment.Dr. Kim believes the integration of these steps will revolutionize on-site analysis. “Integrating multiple pretreatment steps into a single process offers substantial advantages for on-site analysis and automated systems,” he noted.The technology holds massive potential for drinking water safety.KRICT President Young-Kuk Lee also praised the development for its societal benefits. “This technology can enhance the reliability of environmental and food safety analyses,” Lee emphasized.He further stated that these improvements “directly impact public health.”This engineering feat offers a path toward faster food safety inspections. It could soon serve as a primary tool for environmental monitoring across the United States.By removing the need for heavy lab equipment, the device brings laboratory-grade precision directly to the field.This ensures safer water and food supplies for the general public. It provides a robust answer to the invisible contaminants in our daily environment.The study is published in the journal ACS Sensors.
Forever Chemicals Microfluidics PFAS PFOA
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