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Healthy bind

Life Science

Shower water can launder clothes. This pump rids drinking water of pathogens.

As part of a recent American Chemical Society meeting, meanwhile, high school students from Maryland presented their solution to prevent lead contamination.

Their 3D-printed 7.5cm tall filter is made from biodegradable plastic and can be easily attached to the faucet.

It contains a cartridge filled with a mix of calcium phosphate and potassium iodide powder.

The former binds the lead, which sinks through a nylon screen and is then trapped at the base of the unit.

If binding capacity is reached, the potassium iodide reacts with the excess lead, colouring the water yellow. A sign to change the filter.

For legionella, of course, there’s a PCR test.

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