Issue 95, 2015

Sodium alginate-based magnetic carbonaceous biosorbents for highly efficient Cr(vi) removal from water

Abstract

Sodium alginate-derived magnetic carbonaceous materials (Fe–SA-X, X means heating temperature) were fabricated by carbothermal reduction of ferric alginate, aiming for efficient removal of Cr(VI) from water. The materials were characterized by X-ray diffraction patterns, scanning electron microscopy, transmission electron microcopy, Fourier transform infrared spectra, X-ray photoelectron spectroscopy, nitrogen sorption, and Raman spectrometry. The adsorption conditions for Cr(VI) onto the samples were optimized, and adsorption kinetics and isotherm studies were thoroughly studied. The adsorption data fitted well with the pseudo-second-order model and Langmuir isotherm model. The Fe–SA-800 was much more efficient than both Fe–SA-400 and Fe–SA-600, and the maximum adsorption capacity was calculated to be 86.32 mg g−1 based on the Langmuir model. The adsorption mechanism was fully discussed, and desorption and regeneration experiments showed that Fe–SA-800 could be easily regenerated and reused. The above results showed that resulting magnetic biosorbents are promising for toxic Cr(VI) removal from water.

Graphical abstract: Sodium alginate-based magnetic carbonaceous biosorbents for highly efficient Cr(vi) removal from water

Supplementary files

Article information

Article type
Paper
Submitted
07 Jul 2015
Accepted
07 Sep 2015
First published
09 Sep 2015

RSC Adv., 2015,5, 77932-77941

Author version available

Sodium alginate-based magnetic carbonaceous biosorbents for highly efficient Cr(VI) removal from water

Z. Lei, S. Zhai, J. Lv, Y. Fan, Q. An and Z. Xiao, RSC Adv., 2015, 5, 77932 DOI: 10.1039/C5RA13226F

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