Mud Hills clinoptilolite has been used in an effluent treatment plant (SIXEP) at the Sellafield nuclear reprocessing site. This material has been used to remove Cs and Sr successfully from effluents for 3 decades. Samples of the zeolite have been tested in column experiments to determine their ability to remove radioactive Cs and Sr ions under increasing concentrations of competing ions, Ca, Mg, Na and K. These ions caused increased elution of Cs and Sr. Ca, Mg and K were more effective competitors than Na. For Na, it was found that if concentration was reduced, then column performance recovered rapidly.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6267155PMC
http://dx.doi.org/10.1007/s10967-018-6329-8DOI Listing

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