Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 117, Issue -, Pages 124-130Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2013.05.048
Keywords
Eucalyptus wood template; Biomorph-genetic magnetic composite; Iron oxide; Hierarchical porous microstructure; Adsorption; Phosphorus
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Funding
- National Natural Science Foundation of China [NSFC40773059, NSFC41263009]
- Guangxi Science and Technology Development Project [GuiKeZhong1298002-3]
- Provincial Natural Science Foundation of Guangxi [2012GXNSFDA053022, 2011GXNSFF018003]
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A novel porous biomorph-genetic composite of alpha-Fe2O3/Fe3O4/C (PBGC-Fe/C) was prepared with eucalyptus wood template to removal phosphate from water and wastewater. Adsorption of phosphorus from aqueous solution onto the PBGC-Fe/C adsorbent has been investigated to evaluate the effects of solution pH, adsorbent grain size, contact time, initial P concentration, and temperature on the removal systematically. At the initial P concentrations of 2, 5, and 10 mg/L, the adsorption capacities for the unpulverized PBGC-Fe/C (0.841-2 mm) were determined to be 0.18, 0.34, and 0.69 mg/g, respectively, which exhibited a similar average value to those of fine particles or nanoparticles of iron oxides reported in the literatures. With increasing initial P concentration from 2 to 50 mg/L, the amounts of P sorbed on the pulverized PBGC-Fe/C adsorbent (0.074-0.149 mm) increased from 0.20 to 1.56 mg/g at 25 degrees C, and the corresponding removal efficiencies decreased from 98.0% to 31.3%. The adsorption could well be described by the pseudo-second-order kinetic equation and the Freundlich isotherm equation. (C) 2013 Elsevier B.V. All rights reserved.
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