Interaction of dolomite thermally treated at 800°C with solutions of mono-, di-, and trisubstituted sodium phosphate was studied. It was shown that thermally treated dolomite binds 0.75 to 3.0 mmol g–1 of phosphorus, depending on the nature of a phosphating reagent, and the interaction mostly occurs with magnesium oxide, which enables use of this kind of dolomite as a sorbent of phosphate ions. It was found that the nature of the phosphating reagent affects the chemical and phase composition of the materials obtained, as well as their sorption properties with respect to heavy metal ions. The products formed in acid-free phosphation of dolomite have high sorption capacity, from 1.5 to 6.8 mmol g–1 for Pb2+, Zn2+, Cu2+, Cd2+, Ni2+, Sr2+, and Co2+ ions, which enables their use as effective sorbents for heavy metal ions.urning.
Russian Journal of Applied Chemistry – Springer Journals
Published: Feb 17, 2016
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