[ RadSafe ] Cesium in soil cleanup in Japan

Dan W McCarn hotgreenchile at gmail.com
Fri Sep 2 10:42:46 CDT 2011

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.



Dan ii

Dan W McCarn, Geologist
108 Sherwood Blvd
Los Alamos, NM 87544-3425
+1-505-672-2014 (Home - New Mexico)
+1-505-670-8123 (Mobile - New Mexico)
HotGreenChile at gmail.com (Private email) HotGreenChile at gmail dot com

-----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
(Mainichi Japan) September 1, 2011
Could be VERY neat, if it scales up!

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