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Magnetic strontium hydroxyapatite (Fe 3 O 4 −SiO 2 −SrHAp) monodispersed microspheres were successfully synthesized by a hydrothermal method and investigated as a sorbent for the removal of Pb(II) from acidic aqueous solutions. The maximum immobilization capacity was 345 mg•g −1 for Pb(II) at pH 3.0, and equilibrium was achieved within 120 min. The experimental data followed the Langmuir isotherm model (R 2 = 0.9987), and the kinetic results accorded with the pseudo-second-order model (R 2 = 0.9982). The Pb(II)-loaded magnetic sorbent was easily separated from aqueous solutions using a permanent magnet.