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Environmental Earth Sciences

, Volume 71, Issue 4, pp 1673–1681 | Cite as

Mineralogical and chemical composition of magnetic fly ash fraction

  • Xue Song WangEmail author
Original Article

Abstract

Magnetic fractions of coal fly ashes from three power plants were obtained by wet magnetic separation method. Quartz and mullite were the crystalline minerals dominating the nonmagnetic fractions. Magnetic fractions contained magnetite, hematite, and, to a lesser extent, quartz and mullite. Iron speciation by Mössbauer spectroscopy indicated the presence of Fe2+ and Fe3+ in aluminosilicate glass in magnetic fractions apart from magnetite and hematite. Chemical analyses revealed that magnetic fractions had about 2.5 times higher concentrations of Co and one to two times higher concentrations of Ni, Cu, Zn, Mo, and Cd. The dominant magnetic minerals were ferrimagnetic, and multi domain and stable single domain grains contributed mainly to the magnetic enhancement of fly ash samples.

Keywords

Characterization Fly ash Fe-bearing minerals Magnetic property Trace metal 

Notes

Acknowledgments

The authors acknowledge the work of an anonymous reviewer whose comments and suggestions greatly improved the quality of this manuscript. The material is based upon work supported by the National Natural Science Foundation of China (20977040).

References

  1. Bhattacharjee A, Mandal H, Roy M, Kusz J, Hofmeister W (2013) Physical characteristics of fly ashes from three thermal power plants in West Bengal, India: a comparative study. Inter J Chem Tech Res 5:836–843Google Scholar
  2. Cho S, Yoo J, Turley AT, Miller CA, Linak WP, Wendt JOL, Huggins FE, Gilmour MI (2009) Relationships between composition and pulmonary 520 toxicity of prototype particles from coal combustion and pyrolysis. Proc Combust Inst 32:2717–2725Google Scholar
  3. Dearing JA, Dann RJL, Hay K, Lees JA, Loveland PJ, Maher BA, O’Grady K (1996) Frequency-dependent susceptibility measurements of environmental materials. Geophy J Inter 124:228–240CrossRefGoogle Scholar
  4. Dearing JA, Bird PM, Dann RJL, Benjamin SF (1997) Secondary ferrimagnetic minerals in Welsh soils: a comparison of mineral magnetic detection methods and implications for mineral formation. Geophys J Inter 130:727–736CrossRefGoogle Scholar
  5. Flanders PJ (1994) Collection, measurement, and analysis of airborne magnetic particulates from pollution in the environment. J Appl Phys 75:5931–5936CrossRefGoogle Scholar
  6. Gomes S, François M, Abdelmoula M, Refait P, Pellissier C, Evrard O (1999) Characterization of magnetite in silico-aluminous fly ash by SEM, TEM, XRD, magnetic susceptibility, and Mossbauer spectroscopy. Cem Concr Res 29:1705–1711CrossRefGoogle Scholar
  7. Hansen LD, Silberman D, Fisher GL (1981) Crystalline components of stack-collected, size-fractionated coal fly ash. Environ Sci Technol 15:1057–1062CrossRefGoogle Scholar
  8. Hay KL, Dearing JA, Baban SMJ, Loveland P (1997) A preliminary attempt to identify atmospherically-derived pollution particles in English topsoils from magnetic susceptibility measurements. Phys Chem Earth 22:207–210CrossRefGoogle Scholar
  9. Hulett JLD, Weinberger AJ, Northcutt KJ, Ferguson M (1980) Chemical species in fly ash from coal-burning power plants. Science 210:1356–1358CrossRefGoogle Scholar
  10. Kapicka A, Jordanova N, Petrovsky E, Ustjak S (2000) Magnetic stability of power-plant fly ash in different soil solutions. Phys Chem Earth 25:431–436CrossRefGoogle Scholar
  11. Kolker A, Huǵǵions FE (2007) Progressive oxidation of pyrite in five bituminous coal samples: an As XANES and 57Fe Mössbauer spectroscopic study. Appl Geochem 22:778–787CrossRefGoogle Scholar
  12. Kukier U, Ishak CF, Sumner ME, Miller WP (2003) Composition and element solubility of magnetic and non-magnetic fly ash fractions. Environ Pollut 123:255–266CrossRefGoogle Scholar
  13. Kutchko BG, Kim AG (2006) Fly ash characterization by SEM–EDS. Fuel 85:2537–2544CrossRefGoogle Scholar
  14. Magiera T, Strzyszcz Z (2000) Ferrimagnetic minerals of anthropogenic origin in soils of some Polish National Parks. Water–Air–Soil Pollut 124:37–48CrossRefGoogle Scholar
  15. Medina G, Tabares JA, Perez-Alcazar GA, Barraza JMA (2006) Methodology to evaluate coal ash content using Siderite Mössbauer spectral area. Fuel 85:871–873CrossRefGoogle Scholar
  16. Oliverira MLS, Waanders F, Silva LFO, Jasper A, Sampaio CH, McHabe D, Hatch RS, Hower JC (2011) A multi-analytical approach to understand the chemistry of Fe-minerals in feed coals and ashes. Coal Comb Gasif Prod 3:51–62Google Scholar
  17. Rassk E (1985) Mineral impurities in coal combustion. Washington: Hemisphere Publisher. Relationships between composition and pulmonary toxicity of prototype particles from coal combustion and pyrolysis. Proc Combust Inst 32:2717–2725Google Scholar
  18. Shan HD, Lu SG (2005) Mineral magnetism of power-plant fly ash and its environmental implication. Acta Miner Sinica 25:141–146Google Scholar
  19. Sharonova OM, Anshits NN, Oruzheinikov AZ, Akimochkina GV, Salanov AN, Nizovshii AG, Semenova ON, Anshits AG (2003) Composition and morphology of magnetic microspheres in power plant fly ash of coal from the Ekibastuz and Kuznetsk basins. Chem Sustain Dev 11:639–648Google Scholar
  20. Smith KR, Veranth JM, Lighty JS, Aust AE (1998) Mobilization of iron from coal fly ash was dependent upon the particle size and the source of coal. Chem Res Toxicol 11:1494–1500CrossRefGoogle Scholar
  21. Thompson R, Oldfield F (1986) Environmental magnetism. Allen and Unwin, LondonCrossRefGoogle Scholar
  22. Veranth JM, Smith KR, Huggins F, Hu AA, Lighty JS, Aust AE (2000) Mössbauer spectroscopy indicates that iron in an aluminosilicate glass phase is the source of the bioavailable iron from coal fly ash. Chem Res Toxicol 13:161–164CrossRefGoogle Scholar
  23. Zeng T, Helbel JJ, Bool LE, Sarofim AF (2009) Iron transformation during combustion of Pittsburgh no. 8 coal. Fuel 88:566–572CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Department of Chemical EngineeringHuaihai Institute of TechnologyLianyungangChina

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