STEM与日常科技·英语30篇（9）

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净水器如何不靠化学品去除微塑料

Advanced filters use ceramic or hollow-fiber membranes with pores smaller than 0.1 microns.
Since most microplastics range from 0.1 to 5,000 microns, physical sieving traps nearly all.
Activated carbon layers adsorb dissolved pollutants like chlorine and pesticides alongside particles.
Pressure forces tap water through the membrane while contaminants build up on the outer surface.
Backwashing reverses flow periodically to flush trapped debris and restore flow rate.
Lab tests confirm removal rates above 99.9% for common polyethylene and polyester fragments.
No electricity or chemicals are needed—just household water pressure and regular cartridge changes.
Used cartridges are recyclable in some regions, though collection programs remain limited globally.