Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 254, Issue -, Pages 157-165Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2013.03.035
Keywords
Magnetic mesoporous microsphere; Large pore size; Amino-grafting; Heavy metal ions removal; Regeneration
Categories
Funding
- National Natural Science Foundation of China [21076094, 20743005, 11274057, 21203179]
- 973 Program [2012CB626801]
- Science and Technology Project of Liaoning Province [2012222009]
- Fundamental Research Funds for the Central Universities [DC12010117]
- Program for Liaoning Excellent Talents in University [LJQ2012112]
Ask authors/readers for more resources
Pore size of mesoporous materials is crucial for their surface grafting. This article develops a novel multifunctional microsphere with a large pore size mesoporous silica shell (ca. 10.3 nm) and a magnetic core (Fe3O4), which is fabricated using cetyltrimethylammonium bromide (CTAB) as pore-forming agents, tetraethyl orthosilicate (TEOS) as silicon source through a sol-gel process. Compared with small pore size mesoporous silica magnetic microspheres (ca. 2-4 nm), the large pore size one can graft 447 mg/g amino groups in order to adsorb more heavy metal ions (Pb2+: 880.6 mg/g, Cu2+: 628.3 mg/g, Cd2+: 492.4 mg/g). The metal-loaded multifunctional microspheres could be easily removed from aqueous solution by magnetic separation and regenerated easily by acid treatment. The results suggest that the large pore size multifunctional microspheres are potentially useful materials for high effectively adsorbing and removing different heavy metal ions in aqueous solution. (C) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available