Synthesis of HS/NH₂-Bi-Functional Mesoporous Silica and its Adsorption of Co(II) and Mn(II) in Dilute Solutions

Abstract:

Bi-functional mesoporsous silica adsorbents, functionalized via the introduction of chelating agents (mercaptopropyl and aminopropyl groups) were prepared to adsorb Co²⁺ and Mn²⁺ in dilute solutions. The molar ratio of MPTMS/APTMS in grafting process seemed to have great effected on the mesostructure of adsorbents, and the appropriate value was considered to be 2/1. The modified silica gels at that ratio showed well-ordered property as well as its high infinity of the two metal ions. The pseudo-second-order equation was applied to describe the adsorption kinetics. And the influence of interferential ions Ca²⁺ and Mg²⁺ was also studied.

• Periodical: Applied Mechanics and Materials (Volumes 178-181)
• Pages: 586-590
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.178-181.586
• Online since: May 2012
• Authors: Qing Xu Yao, Ming Chun Jia, Jin Feng Men
• Keywords: Adsorption Capacity, Interferential Ions, Mesoporous Silica, Thiol/amine Bi-Functionalized

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