FIELD: technological processes.
SUBSTANCE: invention relates to production of composite sorbent, which can be used for environmental protection. Hydroxyapatite is synthesized by mixing a suspension of montmorillonite clay with a saturated solution of calcium hydroxide followed by the introduction of a solution of orthophosphoric acid. An atomic Ca:P ratio of 1.2 to 2.0 is provided in the mixture with a hydroxyapatite : clay ratio of 1:1.5 to 1:19. Product is dried at 20–400 °C and ground to a powder.
EFFECT: invention provides a composite sorbent with high sorption activity with respect to heavy metal ions and organic dyes.
1 cl, 1 tbl, 6 ex
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