Radiation in Tokyo Water Stokes Run on Indonesian Coconut-Shell Purifiers
By Kanoko Matsuyama and Jason Gale - Apr 3, 2011 11:27 PM
Efforts to protect Tokyo’s tap water from radiation leaked by a damaged nuclear-power plant have led to a run on Indonesian coconut husks.
Granulated charcoal, made of shells of coconuts and oil- palm kernels, is being used by treatment plants in Tokyo and neighboring regions to filter tap-water supplies. Prices for the absorbent carbon material have risen as much as 44 percent since the March 11 earthquake and tsunami that triggered the radiation threat, said Yoshio Toi, a spokesman for the municipal government in Chiba, a prefecture neighboring Tokyo.
Treatment plants are trying to remove any traces of radioactive matter, such as iodine-131, known to cause thyroid cancer, and convince customers that water supplies are safe. Some Tokyo facilities more than quadrupled the amount of activated charcoal used in filtration after a March 21 sample contained iodine-131 that exceeded the safe limit for infants.
“Tokyo is ordering more activated charcoal as we deplete our stocks,” said Gen Ozeki, a spokesman for the city’s Bureau of Waterworks. “It’s not just Tokyo doing this, others are taking extraordinary measures for their water, too, so charcoal is becoming scarce.”
http://www.bloomberg.com/news/2011-04-04/radiation-in-tokyo-water-stokes-run-on-indonesian-coconut-shell-purifiers.html