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KMID : 1024519930020040347
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Journal of the Environmental Sciences
1993 Volume.2 No. 4 p.347 ~ p.356
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Removal of Cs[+] and Sr[2+] Ions by Natural Zeolites
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Kim Duk-Soo
Park Jae-Woo
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Abstract
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The three natural zeolites collected in Yungil-gun, Kyungsangbuk-do, Korea, were analyzed by means of chemical wet methods and X-ray diffraction. The results indicated that the primary species of those zeolites were clinoptilolite mixed with heulandite, feldspar, montmorillonite, and quartz. These zeolites were chemically treated with NaOH, , and HCl solution and their differences were also studied with X-ray diffraction method. The capabilities of removing and ions with chemically untreated zeolites, chemically treated zeolites, and also with synthetic zeolites were compared. The effect of other cations in removing ions was also studied. The experimental results showed that and ions could be removed up to 98% and 95% respectively out of 5 ppm with chemically untrearted natural zeolites. The treatment of 0.02N- and that of 2N-NaOH were most effective In removing and ions, respectively. It was found that the mountaintop of Sangjung 1-dong natural zeolite treated with 2N-NaOH was most efficient in removing ions mixed with other cations, compared with any other chemically treated and untreated natural zeolites in this work.
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KEYWORD
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capability of removing, chemical treatment , natural zeolite
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