[ RadSafe ] Cesium in soil cleanup in Japan

[Dan W McCarn]

Dear Group:

If memory serves, Ca+ is abated to a significant degree by adsorption onto
various clays, reducing bioavailability. As was described to me by a
radiochemist from Belarus, the Cs+ tends to become irreversibly adsorbed
into the clay lattice structure.  This is consistent with the ion-exchange
selectivity of monovalent ions. The degree of selectivity is as follows:

Cs+ > Rb+ > K+ > Na+ > Li+; Sposito (1989); Freeze & Cherry (1979)

Because of the dominantly volcanic nature of the Japanese Islands, I suspect
that montmorillonite will be the dominant clay present in soils.

See 

http://www.epa.gov/radiation/docs/kdreport/vol1/402-r-99-004a.pdf 

Dan ii

--
Dan W McCarn, Geologist
108 Sherwood Blvd
Los Alamos, NM 87544-3425
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-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu
[mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Miller, Mark L
Sent: Friday, September 02, 2011 08:54
To: The International Radiation Protection (Health Physics) Mailing List
Subject: [ RadSafe ] Cesium in soil cleanup in Japan

Researchers develop cheap, easy method for cesium-tainted soil cleanup -
Scientists at a national research institute have announced the development
of technology to extract nearly all radioactive cesium from contaminated
soil.
(Mainichi Japan) September 1, 2011
Could be VERY neat, if it scales up!
http://www.linkedin.com/news?viewArticle=&articleID=743332473&gid=3256887&ty
pe=member&item=68773329&articleURL=http%3A%2F%2Fmdn%2Emainichi%2Ejp%2Fmdnnew
s%2Fnews%2F20110901p2a00m0na011000c%2Ehtml&urlhash=7Wv9&goback=%2Egde_325688
7_member_68773329


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