Abstract
Under the effect of an adjustable magnetic field (0-0.6T), porous silica gel was synthesized via sol-gel process by phase separation method to investigate the effect of magnetic field on the formation time of porous silica gel and the influence of porous silica gel synthesized under the induction of magnetic field (m-SiO2) on Pb2+ adsorption property. The findings of this study show that the reaction rate can be increased and the gelation time shortened under the effect of magnetic field. Within the range of intensity of the magnetic field in this study, the 0.25T magnetic field affects the porous silica gel most significantly and can reduce the gelation time from 120min to 90min; the Pb2+ adsorption property of m-SiO2 is better than that of ordinary silica gel (SiO2); under the condition that the solid-to-liquid ratio and the pH value change, the Pb2+ equilibrium adsorption rate and equilibrium absorption capacity of silica gel synthesized with the 0.25T magnetic field, compared with ordinary silica gel (SiO2), can averagely increase by 11.32% and 11.20mg/g, respectively.
Published Version
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