Magnetic Field Effects on Synthesis of Porous Silica Gel and the Adsorption Property of Pb²⁺ Ions

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.

• Periodical: Advanced Materials Research (Volumes 1004-1005)
• Pages: 612-618
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1004-1005.612
• Online since: August 2014
• Authors: Zheng Wei Xiong, Sen Lu, Jing Song Wang*, Ping Sun
• Keywords: Adsorption Property, Magnetic Field, Phase-Separation Method, Silica Gel

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