Fabrication of Fe-coordinated diamino-functionalized SBA-15 with hierarchical porosity for phosphate removal
Huang, W., Li, D., Zhu, Y., Xu, K., Li, J., Han, B. and Zhang, Y. (2013) Fabrication of Fe-coordinated diamino-functionalized SBA-15 with hierarchical porosity for phosphate removal. Materials Letters, 99 . pp. 154-157.
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Hierarchically macroporous-mesoporous SBA-15 phosphate adsorbent was synthesized via a dual-templating approach, followed by diamino-functionalization and Fe(III) impregnation. The resulting Fe(III)-coordinated diamino-functionalized macroporous-mesoporous adsorbent possessed well-defined and interconnecting macroporous and mesoporous networks. Its maximum adsorption was 12.7 mg/g, which was 86.8% greater than that of Fe(III)-coordinated amino-functionalized mesoporous SBA-15. In the kinetic study of macroporous-mesoporous adsorbent, 92.5% of the final adsorption capacity reached in the first 1 min; and the adsorption followed the pseudo-second-order equation well, suggesting the presence of chemisorption. The pH ranging from 3.0 to 6.0 favored the high phosphate adsorption of hierarchically porous adsorbent; however, the coexistence of other anions, especially F-, retarded the adsorption.
|Publication Type:||Journal Article|
|Murdoch Affiliation:||School of Engineering and Information Technology|
|Copyright:||© 2013 Elsevier B.V.|
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