The solid-liquid extraction of Cu(II) from 0.33 M (Na+, H+)SO42- sulphate medium at 25 degrees C by calcined mesoporous materials type Si-MCM-41, impregnated by the acidic extractant 3-phenyl-4-benzoyl-isoxazol-5-one (HPBI), has been tested. The Si-MCM-41 material was impregnated by HPBI using the dry impregnation method. It was characterized by physico-chemical methods: N-2-sorption, XRD, SEM and determination of the amount of HPBI in the solid. The extraction rate was determined as a function of pH and extractant concentration in the material. The extraction of Cu(II) into impregnated mesoporous material can reach 99%. (c) 2006 Elsevier Ltd. All rights reserved.