Design and Testing of 3D-Printed Microfluidic Devices for Microplastic Monitoring

This research presents a stereolithography printed microfluidic device designed to measure microplastic particles in drinking water. The microfluidic configuration consists of a single channel with <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$2,000 \times 1,000 \upmu \mathrm{m}$</tex> cross section with two copper wires aligned horizontally at the center of the channel. These copper wires serve as electrodes for impedance spectroscopy techniques. The experiment used <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$15-\upmu \mathrm{m}$</tex> polystyrene beads at concentrations of 2,500 to 130,000 beads/ml, respectively. The result shows that as the concentration of the microplastics increases, the magnitude of the impedance slightly increases.