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US students win Stockholm Junior Water Prize

Two students from the US, Ryan Thorpe and Rachel Chang, received the 2017 Stockholm Junior Water Prize yesterday (August 29) for their novel approach to detect and purify water contaminated with Shigella, E.coli, Salmonella, and Cholera.

The students, who received their prize from HRH Crown Princess Victoria of Sweden at a ceremony during World Water Week in Stockholm, constructed a system that detects and purifies water contaminated with Shigella, E.coli, Salmonella, and Cholera more rapidly and sensitively than conventional methods.

Their system detects as little as one reproductive bacteria colony per litre instantaneously and eliminates bacterial presence in approximately ten seconds. In contrast, conventional methods have detection limits of up to 1,000 colonies and take one to two days. The students' novel approach could prevent the contraction and outbreak of waterborne diseases and expand potable water throughout the world.

In its citation, the jury said: "This year's winning project embodies the fundamental principle of providing safe drinking water. The winner's motivation is to eliminate millions of human deaths each year. The project developed a unique, rapid, and sensitive method to identify, quantify and control water contaminants.

"This method is applicable to both developed and developing world. The winning project has used fundamental science in an elegant way to address pathogenic bacteria in drinking water. The project has the potential to revolutionise the future of water quality."

Torgny Holmgren, executive director of SIWI, said: "This is a very inspiring project that takes on one of the world's biggest challenges, providing clean drinking water for all. Methods like these can unlock huge human potential, when access to safe drinking water, and by extension health, improves among hundreds of millions of people."

The Stockholm Junior Water Prize competition brings together the world's brightest young scientists to encourage their continued interest in water and the environment. Teams from 33 countries competed in the 2017 finals.

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