Journal
DESALINATION
Volume 267, Issue 2-3, Pages 193-200Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.desal.2010.09.025
Keywords
Sorption; Kinetics; Equilibrium isotherm; Dye; Modified wheat residue (MWR)
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Funding
- Postdoctoral Innovation Fund of Shandong Province [200802020]
- National Natural Science Foundation of China [50878121, 21007034]
- Key Projects in the National Science & Technology Pillar Program in the Eleventh Five-year Plan Period [2006BAJ08B05]
- Science and Technology Development Key Program of Shandong Province, China [2006GG2206007]
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The utilization of modified wheat residue (MwR) as sorbent to remove the anionic dye (Reactive Red-24, RR-24) from aqueous solution was studied. MWR was prepared and characterized by specific surface area, SEM, zeta potential, FTIR and elemental analysis. Sorption experiments were carried out as a function of sorbent dosage, pH, contact time and concentration of dye. Results indicated that a mass of amine groups were grafted into the framework of MWR. It was shown that pseudo-second-order kinetic equation could best describe the sorption kinetics. The equilibrium sorption data were well represented by the Langmuir isotherm equation. The maximum sorption capacity of MWR for RR-24 was 200.0 mg/g, which showed higher capacity than those of previous work and a similar capacity compared to those of commercial activated carbon. The results indicated that MWR could be employed as an excellent and low-cost sorbent for removal of anionic dye from aqueous solution. (c) 2010 Elsevier B.V. All rights reserved.
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