Removal of Cd2+ and Mn2+ ions from aqueous solutions by synthetic cation substituted calcium-carbonate-apatite

Substituted Mg and Na containing carbonate-fluorapatites were synthesized by the wet method at pH = 9 and T = 80 °C. Their removal characteristics for Cd 2+ and Mn 2+ from aqueous solutions at pH = 5 were examined by a batch method. The samples were characterized by chemical, XRD, IR, and BET analys...

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Bibliographic Details
Published in:Toxicological and environmental chemistry 1997-11, Vol.64 (1-4), p.145-154
Main Authors: Tõnsuaadu, Kaia, Peld, Merike, Veiderma, Mihkel
Format: Article
Language:eng ; jpn
Subjects:
binding capacity
cadmium
Calcium-Fluor-Carbonate-Apatite
manganese
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Summary:Substituted Mg and Na containing carbonate-fluorapatites were synthesized by the wet method at pH = 9 and T = 80 °C. Their removal characteristics for Cd 2+ and Mn 2+ from aqueous solutions at pH = 5 were examined by a batch method. The samples were characterized by chemical, XRD, IR, and BET analyses. The amount of Cd and Mn sorbed increases with the increase in the content of Mg in the apatite up to 44.5 mg Cd and 31.0 mg Mn per 100 mg apatite. Ion sorption proceeds either by ion exchange or by the precipitation-dissolution mechanism.
ISSN:0277-2248
1029-0486
DOI:10.1080/02772249709358545