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Toxic water

February 2012
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Brunson says many water projects in developing countries fail for obvious reasons - money runs out, or machinery breaks down."
Access to safe drinking water is a global problem for nearly a billion people.

For about 200 million, many in Africa, high levels of naturally occurring fluoride in the water causes disfiguring dental and skeletal disease.

“Dental fluorosis is a darkening or mottling of the teeth,” says Laura Brunson, an environmental scientist at the University of Oklahoma in the United States. “There is a sort of social stigma attached to it, maybe a poverty stigma. Skeletal fluorosis is much more physically debilitating.”

But Brunson is on the case. She's developing fluoride-filtering devices that use cheap materials that are readily available in the villages. A resident with a kiln, for example, could create the char from eucalyptus wood, or bones.

The low-cost filter would treat the water, which can then be sold for a minimal cost. That would both provide fluoride-treated water to the community and give the person who's running that business a job.

During recent field work in Ethiopia, Brunson and her team set up a lab in a local guest house - and started experimenting.

“Are there things we can add,” asks Brunson, “or ways we can alter the bone char either through some sort of oxidation process, or through adding something like aluminum to the material, that would make it even more effective?”

Brunson says many water projects in developing countries fail for obvious reasons - money runs out, or machinery breaks down.

“Of the seven or eight communities we visited, there only were maybe two that were actually functioning as far as treatment systems.”

But equally important, she says, are cultural factors. Figuring out how to get the community behind a water filtering project.

The team spoke to a lot of people, and asked a lot of questions.

“How do you use water, where do you get it from, what do you think about the current treatment system, is there something you would prefer to have?”

Brunson, who also teaches in the college of business, says getting communities committed to water treatment could also be a money-making opportunity for local people.

“If you can set up a business so that the char you are selling that is helping people get treated water is making enough money so you can be self sustaining, then you can keep going,” says Brunson.

Science and social entrepreneurship coming together to make affordable, safe water available to millions.
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