Magnetic Nd₂Fe₁₄B Actived Carbon: Fabrication and Heterogeneous Fenton Oxidation of Congo Red

Abstract:

Magnetic Nd₂Fe₁₄B activated carbon, a new kind of heterogeneous Fenton catalyst has been synthesis to treat the dyestuff wastewater. The obtained catalysts were characterized by X-raydiffraction (XRD) and vibrating sample magnetometer (VSM), and the catalytic activity in heterogeneous Fenton oxidation of Congo red was evaluated. Experiments show that the Nd2Fe14B activated carbon has hard magnetic properties. The saturated magnetization, remanence and coercive force were 15.93emu/g, 6.0emu/g, and 1313Oe, respectively. The results also indicated that Nd2Fe14B activated carbon has good performance on azo dye Congo red oxidation with heterogeneous Fenton process. Under the optimum conditions ([NdFeB-AC-FC]₀=20g/L, [H₂O₂]₀= 8mmol/L and pH=7.0), Congo red degradation rate could reach 83.4%. The pH had few effects on heterogeneous Fenton process degraded Congo red. The kinetics studied shown that Congo red degraded followed the pseudo-first-order reaction by heterogeneous Fenton process.

• Periodical: Applied Mechanics and Materials (Volumes 675-677)
• Pages: 426-429
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.675-677.426
• Online since: October 2014
• Authors: Chun Wei Yang*, Dong Wang, Qian Tang
• Keywords: Azo Dyes, Congo Red, Heterogeneous Fenton, Magnetic Actived Carbon, Nd₂Fe₁₄B

References

[1] Y.L. Song, and J.T. Li. Degradation of C.L. Direct Black168 from aqueous solution by flyash/H2O2 combining ultrasound. Ultrason. Sonochem. 2009, 16(4): 440–444.

DOI: 10.1016/j.ultsonch.2008.12.011

[2] V. Kavitha, and K. Palanivelu. Degradation of nitrophenols by Fenton and photo-Fenton processes. J. Photochem. Photobiol. 2005, 170 (1): 83–95.

DOI: 10.1016/j.jphotochem.2004.08.003

[3] A. Georgi, A. Schierz, U. Trommler, C.P. et al. Humic acid modified Fenton reagent for enhancement of the working pH range. Appl. Catal. B: Environ. 2007, 72 (1-2): 26–36.

DOI: 10.1016/j.apcatb.2006.10.009

[4] E.G. Garrido-Ramírez, B.K.G. Theng, M.L. Mora, Clays and oxide minerals ascatalysts and nanocatalysts in Fenton-like reactions-A review. Appl. Clay Sci. 2010, 47 (3-4): 182–192.

DOI: 10.1016/j.clay.2009.11.044

[5] Y.Y. Zhang, J.H. Deng, C. He, et al. Application of Fe2V4O13 as a new multi‐metal heterogeneous Fenton‐like catalyst for the degradation of organic pollutants. Environmental Technology. 2010, 31(2): 145–154.

DOI: 10.1080/09593330903397755

[6] Yanbin Wang, Hongying Ming, fang Li, et al. Magnetic ordered mesoporous copper ferrite as a heterogeneousFenton catalyst for the degradation of imidacloprid. Appl. Catal. B: Environ. 2014, 147 (5): 534–545.

DOI: 10.1016/j.apcatb.2013.09.017

[7] Nassira Ferroudja, b, Jimmy Nzimotoa, Anne Davidson, et al. Maghemite nanoparticles and maghemite/silica nanocompositemicrospheres as magnetic Fenton catalysts for the removal of water pollutants. Appl. Catal. B: Environ. 2013, 136– 137: 9–18.

DOI: 10.1016/j.apcatb.2013.01.046

[8] R.D. Ambashta, and M. Sillanpää. Water purification using magnetic assistance: A review. Journal of Hazardous Materials. 2010, 180(1-3): 38–49.

DOI: 10.1016/j.jhazmat.2010.04.105

[9] Min Xia, Chen Chen, Mingce Long. et al. Magnetically separable mesoporous silica nanocomposite and its application in Fenton catalysis. Microporous and Mesoporous Materials. 2011, 145(1-3): 217–223.

DOI: 10.1016/j.micromeso.2011.05.017

[10] Klara Rusevova, Frank-Dieter Kopinke, Anett Georgi. Nano-sized magnetic iron oxides as catalysts for heterogeneous Fenton-like reactions-Influence of Fe(II)/Fe(III) ratio on catalytic performance. Journal of Hazardous Materials. 2012, 241–242: 433–440.

DOI: 10.1016/j.jhazmat.2012.09.068