An exploratory study on low-concentration hexavalent chromium adsorption by Fe(III)-cross-linked chitosan beads

Royal Society Open Science
Yaoguo WuJianguo Wei

Abstract

In this study, Fe(III)-cross-linked chitosan beads (Fe(III)-CBs) were synthesized and employed to explore the characteristics and primary mechanism of their hexavalent chromium (Cr(VI)) adsorption under low concentration Cr(VI) (less than 20.0 mg l-1) and a pH range from 2.0 to 8.0. Batch tests were conducted to determine the Cr(VI) adsorption capacity and kinetics, and the effects of pH and temperature on the adsorption under low concentration Cr(VI) and a pH range from 2.0 to 8.0. Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy were employed to explore the characteristics of Fe(III)-CBs and their Cr(VI) adsorption mechanisms. The results show that, unlike the adsorption of other absorbents, the Cr(VI) adsorption was efficient in a wide pH range from 2.0 to 6.0, and well described by the pseudo-first-order model and the Langmuir-Freundlich isotherm model. The capacity of Cr(VI) adsorption by Fe(III)-CBs was as high as 166.3 mg g-1 under temperature 25°C and pH 6.0. The desorption test was also carried out by 0.1 mol l-1 NaOH solution for Fe(III)-CBs regeneration. It was found that Fe(III)-CBs could be re-used for five adsorption-desorption cycles without signific...Continue Reading

References

Nov 23, 2001·Environmental Science & Technology·Y S YunB Volesky
Jan 30, 2007·Journal of Colloid and Interface Science·S Meenakshi, Natrayasamy Viswanathan
Aug 19, 2007·Environmental Science & Technology·Jun FangBaolin Deng
Oct 16, 2007·Journal of Colloid and Interface Science·Donghee ParkJong Moon Park
Mar 24, 2010·Journal of Hazardous Materials·Ana Claudia ZimmermannClovis Antonio Rodrigues
Jul 8, 2010·Journal of Hazardous Materials·Rifaqat A K Rao, Fouzia Rehman
Oct 15, 2010·Chemosphere·Helen Helena Dos SantosAnna Slawska-Waniewska
Dec 4, 2012·Journal of Hazardous Materials·Chensi ShenWeiping Liu
Jul 6, 2013·Materials Science & Engineering. C, Materials for Biological Applications·Nguyen Ngoc ThinhTran Dai Lam
Sep 6, 2014·ACS Applied Materials & Interfaces·Ecaterina Stela DraganAna Irina Cocarta

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Citations

Jun 27, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Xue-Xue LiangXiao-Kun Ouyang
Jan 9, 2021·Journal of Hazardous Materials·Ismaila Olalekan SaheedFaiz Bukhari Mohd Suah

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Methods Mentioned

BETA
scanning electron microscopy
X-ray

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