Thursday, May 26, 2011

No. 281: Newly developed powder for efficient purification of polluted water (May 26, 2011)

A research team led by Kanazawa University Professor Tomihisa Ohta developed powder that purifies polluted water containing radioactive materials. The newly developed powder is the result in the research stage, but it has the ability to process 1,000 tons of polluted water per hour should it be put into practical use. It has 20 times more processing capacity than the powder from Areva of France adopted by the Fukushima Nuclear Power Plant. The research team developed this powder by improving the depurative for contaminated soil. It is a combination of several chemical substances with the action to agglutinate zeolite and metals. It deposits by taking in radioactive substances in the sea efficiently. It was developed in collaboration with Kumaken Kogyo in Akita Prefecture. In the experiment that uses water in which nonradioactive iodine, cesium, strontium are dissolved at a concentration of 1-10 ppm, the powder succeeded in clear them away to nearly 100%. The research team is confident that the powder exhibits the same processing function for radioactive substances as for nonradioactive substances. The professor has already designed the large-scale processing system, and he plans to propose the new powder with the system to the Japanese government and Tokyo Electric Power.

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