[CPEO-MEF] Carbon filtration of perchlorate

[Lenny Siegel <lsiegel@cpeo.org>]

Perchlorate removal offers hope

INLAND: A carbon filter being tested is seen as a breakthrough in 
removing the pollutant from water.


By ROBERTO HERNANDEZ
Riverside Press-Enterprise (CA)
April 25, 2005

The latest way to remove a rocket-fuel chemical that has contaminated 
Inland water supplies could soon be up for state approval.

If approved, the new method will help create a substantial backup water 
supply for Redlands and a way to clean up pollution that has become the 
latest threat to drinking water in California and other states.

"The treatment technology works and it removes it down to almost 
nothing," Doug Headrick, Redlands chief of water resources, said this 
month. Such a treatment would exceed state guidelines. "We can't even 
detect it."

...

The method being tested in Redlands involves modifying a proven method 
of filtering water with granular activated carbon, or GAC. Carbon is 
commonly used to remove chlorine, pesticides, benzene, solvents and 
other chemicals. When water flows past the porous surface of carbon, the 
chemicals stick to the carbon while the water passes on.

But, until now, GAC has not been an efficient way of removing 
perchlorate from water. Headrick said the Penn State researchers have 
specially treated carbon so that it can remove a significant amount of 
perchlorate from water.

...

For the entire article, see
http://www.pe.com/breakingnews/local/stories/PE_News_Local_H_perch26.f551.html


--
Lenny Siegel
Director, Center for Public Environmental Oversight
c/o PSC, 278-A Hope St., Mountain View, CA 94041
Voice: 650/961-8918 or 650/969-1545
Fax: 650/961-8918
http://www.cpeo.org

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