Pb(II) removal from aqueous solution by polyacrylic acid stabilized zero-valent iron nanoparticles: process optimization using response surface methodology

Pb(II) removal from aqueous solution by polyacrylic acid stabilized zero-valent iron... Optimization and modeling of Pb(II) removal using polyacrylic acid stabilized zero-valent iron nanoparticles (PAA-ZVINs) from aqueous solution was performed. Central composite design (CCD) as the most applicable method in response surface methodology (RSM) was employed for optimization of Pb(II) removal. ZVINs were synthesized using the borohydride reduction method in the presence of PAA as a stabilizer and characterized via scanning electron microscopy (SEM) and X-ray diffraction (XRD). The independent variables for CCD optimization of Pb(II) removal were initial solution pH, ZVINs concentration (g/L), and initial concentration of Pb(II) (mg/L). Results showed a significant correlation between predicted values obtained from second-order polynomial model and experimental values (R 2 = 93.19 and adj-R 2 = 87.07). Maximum removal of Pb(II) (90.09 %) was observed at the optimal conditions of ZVINs concentration of 3 g/L, initial Pb(II) concentration of 10 mg/L, and initial solution pH of 5. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Pb(II) removal from aqueous solution by polyacrylic acid stabilized zero-valent iron nanoparticles: process optimization using response surface methodology

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Publisher
Springer Netherlands
Copyright
Copyright © 2012 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-012-0975-1
Publisher site
See Article on Publisher Site

Abstract

Optimization and modeling of Pb(II) removal using polyacrylic acid stabilized zero-valent iron nanoparticles (PAA-ZVINs) from aqueous solution was performed. Central composite design (CCD) as the most applicable method in response surface methodology (RSM) was employed for optimization of Pb(II) removal. ZVINs were synthesized using the borohydride reduction method in the presence of PAA as a stabilizer and characterized via scanning electron microscopy (SEM) and X-ray diffraction (XRD). The independent variables for CCD optimization of Pb(II) removal were initial solution pH, ZVINs concentration (g/L), and initial concentration of Pb(II) (mg/L). Results showed a significant correlation between predicted values obtained from second-order polynomial model and experimental values (R 2 = 93.19 and adj-R 2 = 87.07). Maximum removal of Pb(II) (90.09 %) was observed at the optimal conditions of ZVINs concentration of 3 g/L, initial Pb(II) concentration of 10 mg/L, and initial solution pH of 5.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jan 1, 2013

References

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