Environmental Activity of Heavy Metals in Slags Treated by Electrokinetic Removal Technology

Abstract:

Ancient pyrometallurgical zinc generated large amounts of slag. Natural leaching from ancient pyrometallurgical zinc sites had contaminated the soil closed to the deposits. Enhanced electrokinetic removal technology was adopted to treat these slags. In this paper, atomic fluorescence spectrometer and scanning electronic microscope were used to investigate the total metal concentration and the surface topography of slags. The results showed that the heavy metals content in slags was high. The content of zinc in slags was up to 114550mg/kg. The surface topography of slags indicated that that the slags were corroded obviously by rainwater and lots of poisoning elements had released to the surroundings. The optimized BCR sequential extraction procedure was used to analyze the chemical speciation of heavy metals in slags. It could be determined that the evironmental activity of ancient pyrometallurgical slag decreased obviously after the treatment with electrokinetic removal technology and part of the residual fraction of heavy metals in slags transformed to the other fractions during the electrokinetic removal process.

• Periodical: Applied Mechanics and Materials (Volumes 84-85)
• Pages: 264-268
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.84-85.264
• Online since: August 2011
• Authors: Zhong Hui Xu, Dong Wei Li, Xi Peng
• Keywords: Ancient Pyrometallurgical Slag, Enhanced Electrokinetic Technology, Environmental Activity, Heavy Metal, Optimized BCR

References

[1] Costagliola P., Benvenuti M., Chiarantini L. et al.: Appl. Geochem Vol. 23(2008), p.1241.

[2] Manz M. and Castro L. J.: Environ. Pollut Vol. 98(1997), p.7.

[3] BH M. and CS A.: Res.J. Chem. Environ Vol. 12(2008), p.30.

[4] Malviya R. and Chaudhary R.:J. Hazard. Mater Vol. 137(2006), p.267.

[5] Suzuki I.: Biotechnol. Adv Vol. 19(2001), p.119.

[6] Edwards K. J., Hu B., Hamers R. J. et al.: FEMS Microbiol. Ecol Vol. 34(2001), p.197.

[7] S I. and G D.: Res.J. Chem. Environ Vol. 13(2009), p.29.

[8] P S., W C. and C T.: Res.J. Chem. Environ Vol. 12(2008), p.23.

[9] Han J. -G., Hong K. -K., Kim Y. -W. et al.: J. Hazard. Mater Vol. 177(2010), p.530.

[10] Park S. -W., Lee J. -Y., Yang J. -S. et al.: J. Hazard. Mater Vol. 169(2009), p.1168.

[11] Isosaari P., Piskonen R., Ojala P. et al.: J. Hazard. Mater Vol. 144(2007), p.538.

[12] Traina G., Morselli L. and Adorno G. P.: Electrochim. Acta Vol. 52(2007), p.3380.

[13] Wang J. -Y., Zhang D. -S., Stabnikova O. et al.: J. Hazard. Mater Vol. 124(2005), p.139.

[14] Hansen H. K., Rojo A. and Ottosen L. M.: J. Hazard. Mater Vol. 117(2005), p.179.

[15] Xu Z., Peng X., Zhou Z. et al.: Disaster Adv Vol. 3(2010), p.242.

[16] Xu Z. and Li D.: Res.J. Chem. Environ Vol. 14(2010), p.44~48.

[17] Sutherland R. A. and Tack F. M. G.: Adv Environ Res Vol. 8(2003), p.37.