Removal of Strontium Ions from Aqueous Solution by Sunflower Straw

Abstract:

The sorptive potential of sunflower straw (≤125 μm) for Sr²⁺ from aqueous solution was evaluated. Batch adsorption experiments were carried out as a function of solution pH, adsorbent dosage, Sr²⁺ concentration and contact time. FT-IR spectra and SEM of sunflower straw were employed to explore the functional groups available for the binding of Sr²⁺ and morphology of the adsorbent. Maximum uptake capacity of sunflower straw was 17.48 mg/g occurred at around pH 3-7. The adsorption equilibrium can be achieved within 5 min and kinetic data were fitted well to pseudo-second-order model. The Langmuir and Freundlich models were applied to describe isotherm sorption data. The Langmuir model gave an acceptable fit than Freundlich model.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 1922-1925
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.1922
• Online since: August 2013
• Authors: Lian Ai*, Xue Gang Luo, Xiao Yan Lin, Si Zhao Zhang
• Keywords: Adsorption, Strontium, Sunflower Straw

References

[1] Nariman H.M. Kamel: J. Environ. Radioactiv. Vol. 101 (2010), p.297–303.

[2] N. Das: Clean–Soil, Air, Water Vol. 40 (2012), p.16–23.

[3] D. Sud, G. Mahajan and M.P. Kaur: Bioresour. Technol. Vol. 99 (2008), p.6017–6027.

[4] Y.S. Ho and G. McKay: Process Biochem. Vol. 34 (1999), p.451–465.

[5] I. Langmuir: J. Am. Chem. Soc. Vol. 40 (1916), p.1361–1403.

[6] H.M.F. Freundlich: J. Phys. Chem. Vol. 57(1906), p.385–470.