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Riverbank filtration pulls pollutants from drinking water

left the river.

In a campus lab, the Johns Hopkins researchers are trying to learn more about this natural filtration process by sending samples of river water through glass columns filled with sediment. They believe that soil characteristics and environmental factors such as the amount of river flow may also affect the natural filtration process.

Weiss, who is preparing his doctoral thesis on riverbank filtration, says the technique may not be appropriate in some areas, such as regions of the Western United States where rivers typically dry up in the summer. But in communities that depend on rivers for a year-round supply of drinking water, Weiss expects riverbank filtration to become more common in the coming years. "We definitely think riverbank filtration is worthwhile," he said. "We're letting nature maintain the system, minimizing the need for external maintenance and the associated costs."


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Contact: Phil Sneiderman
prs@jhu.edu
443-287-9960
Johns Hopkins University
25-Aug-2004


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