Skip to Main Content
Phosphate adsorption on aluminum-impregnated mesoporous silicates : surface structure and behavior of adsorbentsAuthor(s): Eun Woo Shin; James S. Han; Min Jang; Soo-Hong Min; Jae Kwang Park; Roger M. Rowell
Source: Environmental science and technology. Vol. 38, no. 3 (2004): Pages 912-917
Publication Series: Miscellaneous Publication
PDF: Download Publication (124 KB)
DescriptionPhosphorus from excess fertilizers and detergents ends up washing into lakes, creeks, and rivers. This overabundance of phosphorus causes excessive aquatic plant and algae growth and depletes the dissolved oxygen supply in the water. In this study, aluminum-impregnated mesoporous adsorbents were tested for their ability to remove phosphate from water. The surface structure of the materials was investigated with X-ray diffraction (XRD), a N2 adsorption-desorption technique, Fourier transform-infrared (FT-IR), and X-ray photoelectron spectroscopy (XPS) to understand the effect of surface properties on the adsorption behavior of phosphate. The mesoporous materials were loaded with Al components by reaction with surface silanol groups. In the adsorption test, the Al- impregnated mesoporous materials showed fast adsorption kinetics as well as high adsorption capacities, compared with activated alumina. The uniform mesopores of the Al-impregnated mesoporous materials caused the diffusion rate in the adsorption process to increase, which in turn caused the fast adsorption kinetics. High phosphate adsorption capacities of the Al-impregnated mesoporous materials were attributed to not only the increase of surface hydroxyl density on Al oxide due to well-dispersed impregnation of Al components but also the decrease in stoichiometry of surface hydroxyl ions to phosphate by the formation of monodentate surface complexes.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationShin, Eun Woo; Han, James S.; Jang, Min; Min, Soo-Hong; Park, Jae Kwang; Rowell, Roger M. 2004. Phosphate adsorption on aluminum-impregnated mesoporous silicates : surface structure and behavior of adsorbents. Environmental science and technology. Vol. 38, no. 3 (2004): Pages 912-917
KeywordsPhosphate adsorption, aluminum-impregnated mesoporous silicates, adsorbents, phosphorus
- Removal of phosphorus using AMD-treated lignocellulosic material
- Cationized milled pine bark as an adsorbent for orthophosphate anions
- Surface chemistry and moisture sorption properties of wood coated with multifunctional alkoxysilanes by sol-gel process
XML: View XML