Abstract:
The research projects is aimed at studying the appropriate conditions for synthesis of HPMSP doped mesoporous silica via a sol-gel process. The effects of catalyst concentration and amount of doping molecule were examined. The physical properties of HPMSP doped mesoporous silica were studies by XRD, BET, laser diffraction and TGA. The results showed that the HPMSP doped mesoporous silica synthesized from 0.1 M NaOH and 0.06 moles HPMSP was crystalline silica with narrow pore size distribution and narrow particle diameter distribution. The complexation ability of these mesoporous silica with respect to Cu(II) was studies. A Cu(II) sorption capacity of 0.21 mol/kg was obtained in a 0.1 M NaNo [subscript 3] medium. The effects of silica quantity, interfering ions, metal concentration and pH values on extraction of Cu(II) were also investigated. The studies revealed that metal sorption onto HPMSP doped mesoporous silica increases as the silica quantity and pH value increased. Further, the extraction behavior for other metals, Ni(II) and Co(II), was studies. The results indicated that HPMSP doped mesoporous silica was also a good sorbent for Ni(II) and Co(II). The study on metal desorption showed that 1 M HNO [subscript 3] solution was required to quantitatively release the metals from the doped silica due to the great stability of the complex.