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Sep 28, 2007

Fishbone cleans up

Powdered fishbone, a waste product of the food industry, could soon be used to clean up arsenic-contaminated land and water. Fishbone has a negative charge: it is already used to mop up toxic metals that form positive ions, such as lead and copper. Researchers at the University of Notre Dame, US, are developing a process to switch the charge on fishbone, giving it a positive charge so it binds to negatively charged contaminants such as arsenic.

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