Abstract
Sorption of 131I−, 131IO 3 − , 137Cs+, 85Sr2+, and F− ions on synthesized alkaline-earth (AE) (calcium, strontium, and barium) hydroxyphosphates was studied. These hydroxyphosphates were prepared by the reactions MCl2 +Na3PO4 + NaOH = M5(PO4)3OH; MCl2 + NH4OH + (NH4)2HPO4 = M5(PO4)3OH; and MCl2 + NaOH + (NH4)2HPO4 = M5(PO4)3OH (M = Ca, Sr, Ba). All the tested AE hydroxyphosphates do not sorb ionic species of radioactive iodine from aqueous solutions. The highest sorption power with respect to fluoride ion is exhibited by calcium hydroxyphosphate. The degree of 137Cs and 85Sr sorption recovery from aqueous solutions upon their 120-min contact with AE hydroxyphosphates is ∼5–25 and ∼15–80%, respectively.
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