Recycle adsorption of Cu²⁺ on amine-functionalized mesoporous silica monolithic

Abstract

3-Aminopropyltriethoxysilane functionalized worm-like mesoporous silica monolithic(WMSM-NH₂) was prepared and used as a new regenerable adsorbent for the removal of Cu²⁺ ions. The analysis results show that the WMSM-NH₂ monolithic had a high efficiency value of 99.3% for Cu²⁺ remediation when the Cu²⁺ solution was at an initial concentration of 10.32 mg/L. The regeneration study of the WMSM-NH₂ monolithic presented that the adsorption efficiency of 89.0% was remained and a mass of 92.0% was left after seven adsorption-desorption cycles were executed. The monolithic material with high resistance to the acid and good mechanical stability can facilitate the operations of adsorption and regeneration of the adsorbent.

Keywords

Amine-functionalized mesoporous silica monolithic(WMSM-NH₂) / Cu²⁺ removal / Multiple cycle / Adsorption / Easy operation

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