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Inorganic Materials

, Volume 36, Issue 8, pp 826–829 | Cite as

Preparation of calcium and magnesium hydrogen phosphates from natural dolomite and their sorptive properties

  • I. L. Shashkova
  • N. V. Kitikova
  • A. I. Rat’ko
  • A. G. D’yachenko
Article

Abstract

The reaction of dolomite with 10–20% phosphoric acid was studied by x-ray diffraction and chemical analysis in a wide range of dolomite concentrations in the reaction system. The structure, composition, and sorption capacity of the reaction products were determined. The reaction was shown to yield a mixture of calcium hydrogen phosphate, CaHPO4 · 2H2O, with the brushite structure and magnesium hydrogen phosphate, MgHPO4 · 3H2O, with the newberyite structure. The sorption capacity of the reaction product for Pb ions was up to 19 mg-equiv/g. With 10% H3PO4 at an initial dolomite concentration of 0.17 g/ml, a near-theoretical reaction yield was attained.

Keywords

Dolomite Sorption Capacity Magnesium Carbonate Ammonium Phosphate Magnesium Phosphate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© MAIK “Nauka/Interperiodica” 2000

Authors and Affiliations

  • I. L. Shashkova
    • 1
  • N. V. Kitikova
    • 1
  • A. I. Rat’ko
    • 1
  • A. G. D’yachenko
    • 1
  1. 1.Institute of General and Inorganic ChemistryBelarussian Academy of SciencesMinskBelarus

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