On
family trips to India as a child, Deepika Kurup often saw kids like
herself forced to drink dirty water -- as a result, at age 14, this
Mighty Girl became determined to find to a way to ensure that everyone
has access to safe drinking water. For an 8th grade project, the Nashua,
New Hampshire teen invented a water purification system that uses a
photocatalytic composite and sunlight to clean water
-- an invention which earned her recognition as America's Top Young
Scientist in 2012. Three years later, the now 17-year-old scientist has
spent several years improving her purification system and is currently
one of the finalists for the 2015 Google Science Fair!
According to Deepika, access to clean water is a global crisis;
“one-ninth of the global population lacks access to clean water,” she
explains “and 500,000 children die every year because of water related
diseases." On the trips to India, her immigrant parents' native land,
Deepika saw the struggle for clean water first hand: “[My parents] would
have to boil the water before we drank it. I also saw children on the
streets of India... take these little plastic bottles and they’re forced
to fill it up with the dirty water they see on the street. And they’re
forced to drink that water, because they don’t have another choice. And
then I go back to America and I can instantly get tap water."
Her early investigations into water purification methods found that many
of them were expensive and potentially hazardous. “Traditionally, to
purify waste water, they use chlorine, and chlorine can create harmful
byproducts,” she points out. “Also, you have to keep replenishing the
chlorine, you have to keep putting chlorine into the waste water to
purify it.” She wanted to invent a new way to clean water that would be
both cheap and sustainable.
Deepika came up with the idea of
using a photocatalyst -- a substance that reacts with water’s impurities
when energized by the sun -- that also filters the water. The
combination of the reaction and the filtration can remove most
contaminants for a fraction of the cost of chlorine purification. She
determined that her system reduces the presence of coliform bacteria by
98% immediately after filtration and by 100% within 15 minutes. Another
advantage is that her catalyst is reusable: “a catalyst doesn’t get used
up in the reaction,” she says. “Theoretically you can keep using my
composite forever.”
Deepika’s efforts have already by widely
recognized -- in addition to being named America's Top Young Scientist
in the Discovery Education 3M Young Scientist Challenge, she was also
the recipient of the 2013 President's Environmental Youth Award and the
2014 U.S. Stockholm Junior Water Prize, and she was named one of Forbes
Magazine’s 2015 "30 Under 30 in Energy." She's also excited to meet the
other finalists at next week's Google Science Fair's Finalist Ceremony
-- even if it means missing a few days of classes at her new school,
Harvard University, where she plans to study neurobiology. Most of all,
she's looking for forward to taking her research from the lab to real
life: “It’s one thing to be working in a lab, doing this, and another
thing to actually deploy it and see it working in the real world. So
that’s one of my steps in the future.”