2014 Volume 43 Issue 7 Pages 1128-1130
Although cesium adsorbs onto the interlayer of clay minerals, coexisting natural organic matter (NOM) can inhibit this adsorption because of their blocking effect. A large amount of dissolved organic carbon (DOC) in the Pripyat River (= 18 mg L−1) is responsible for the large dissolved fraction of cesium in the river as suggested by cesium LIII-edge EXAFS. In addition, the carbon K-edge NEXAFS by STXM showed that humic acid coats clay minerals in the Pripyat River, which is responsible for the blocking effect.
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