Properties of Ceramic Filter Material Made of Coal Fly Ash and its Application in Chromium(VI) Removal

Abstract:

Ceramic filter material was developed mainly with coal fly ash and used as an absorbent for Cr(VI) removal. This material was characterized through physico-chemical analysis with scanning electron microscope (SEM), energy dispersive X-ray spectrometry (EDS) and mercury porosimeter. Then static adsorption experiment was carried out to study adsorption characteristics of Cr(VI) on this filter material. SEM patterns indicated this material had enormous specific surface area and high porosity. EDS results showed this material was mainly composed of O, Si, C, Al, Mg, Fe, Ca and K in various compounds. Total pore area and porosity above 1.5 nm were 66.8 m2/g and 60.1% respectively. The main parameters affecting Cr(VI) adsorption were dosage and contact time. 200 g/l dosage of this filter material could remove more than 90% of Cr(VI) to solution with 20 mg/l initial concentration. Adsorption isotherm accorded with both Langmuir and Freundlich model. The study proved this ceramic filter material was a good adsorbent with high adsorption capacity to Cr(VI).

• Periodical: Advanced Materials Research (Volumes 105-106)
• Pages: 631-634
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.105-106.631
• Online since: April 2010
• Authors: Zhao Qian Jing, Hong Qin Xue, Shao Hua Lin, Zheng Wang
• Keywords: Ceramic Filter Material, Chromium (VI), Coal Fly Ash

References

[1] S. Wang, M. Soudi, L. Li, et al.: J. Hazard. Mater. Vol. 133(2006), p.243.

[2] Y. Chen and G. Gu: Biores. Technol. Vol. 96(2005), P. 1713.

[3] V. C. Srivastava, I. D. Mall and I. M. Mishra: Chem. Eng. J. Vol. 132(2007), p.267.

[4] Y.C. Sharma, Uma, S.N. Upadhyay, et al.: Colloids Surf A Vol. 317(2008), P. 222.

[5] B. G. Kutchko and A. G. Kim: Fuel Vol. 85(2006), p.2537.

[6] M. Rao, A. V. Parwate and A. G. Bhole: Waste Manage. Vol. 22(2002), p.821.