Water Purification How to Create Drinkable Water with Sunlight and Photocatalysts

Panasonic developed a photocatalytic water purification technology using photocatalysts and the sun’s UV rays to detoxify polluted water at high speeds, creating safe and drinkable water.

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Panasonic

Osaka/Japan – Approximately 70 per cent of the Indian population uses underground water, often containing harmful substances, causing health problems for as many as 50 million people. To solve such drinking-water issues worldwide, Panasonic developed a photocatalytic water purification technology. This technology uses photocatalysts and the UV rays from sunlight to detoxify polluted water (effective against arsenic, hexavalent chromium, bacteria, general organics, and refractory organics, e.g. pharmaceuticals, agrochemicals, and endocrine-disruptors) at high speeds, creating safe and drinkable water.

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Panasonic’s Photocatalytic Water Purification Technology features two core technological developments to process water more efficiently:

1. Achieving a high capacity to decompose toxic substances with synthesis technology of photocatalysts:

When photocatalysts are exposed to ultraviolet light, the reactive oxygen formed, purifies the toxic substances. However, TiO₂, a kind of photocatalyst, comes is troublesome to collect once dispersed in water. Panasonic developed a method to bind TiO₂ to zeolite, which enables photocatalysts to maintain their inherent surface active site. Moreover, since the two particles are bound together by electrostatic force, there is no need for binding chemicals.

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