Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 304, Issue 2, Pages 527-533Publisher
SPRINGER
DOI: 10.1007/s10967-014-3876-5
Keywords
KNiFC; Ion exchange; Cs+; Radioactive wastewater
Funding
- National Natural Foundation of China [11105073, 81101146]
- Natural Science Foundation of Jiangsu Province [BK2011739, BK2011738, BK2012799]
- Ph.D. Programs Foundation of Ministry of Education of China [2012321811008]
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Herein, the sorption behavior of potassium nickel hexacyanoferrate(II) (KNiFC) for Cs+ was investigated by sorption kinetics and isotherms. The results indicate sorption isotherms are well described by the Freundlich equation, sorption kinetics agree with pseudo-second-order kinetics, and rate limiting processes are controlled by film diffusion. The distribution coefficient of Cs+ (K-d,K-Cs), decreased following the order: NH4+ > K > Na+ > Ca2+ > Mg2+, and declined with the increase of pH to a minimum value of 5.3 and then increased with the increase of pH. The selective sorption was closely related to hydrated radius, charge-radius, ionization potential and the structure of KNiFC.
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