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Using bulk acoustic waves for filtering microplastic on polluted water
Summary
This paper reports a design for filtering microplastics from seawater using bulk acoustic waves generated by speakers. The device creates acoustic pressure patterns in a channel that concentrate and separate plastic particles from the water flow.
Microplastic is known as one of the polluted objects on seawater which can contaminate marine biota. In this report, we designed microplastic filters using Bulk acoustic waves. Two speakers were added to the design to create acoustic waves, and three channels were created on the tube where the polluted water flows. The force produced by the wave can separate the microplastic from the polluted water by creating node pressure on the tube, so it presses microplastic particles towards the center of the channel, whereas the clean water on the other two channels. Using this method, the filter can filter all microplastics and have an efficiency of up to 99% for nylon and 95% microplastics.