Abstract. Recently, it has come to our attention, that a polemical note by Milonji´c [S.K. Milonji´ c, Comments on “factors influencing the removal of divalent cations by hydroxyapatite”, J. Hazard. Mater. 162 (2009) 1588–1589], has been published raising several critical comments on some experimental procedures, as well as the presentation and interpretation of some data found in t…