Meet Perry Alagappan, the 18-year-old Texas student who built a $20 filter for toxic e-waste water, removing more than 99% of heavy metals

A Houston student developed an inexpensive filter to remove heavy metals from water. This reusable filter, costing about twenty dollars, uses carbon nanotubes on quartz fibers. The innovative design effectively removes over ninety-nine percent of toxic metal contaminants. Washing the filter with mild acid allows for multiple uses and metal recovery. This breakthrough offers a practical solution for communities facing water pollution challenges.
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