Effect of Heavy Metals and Leaching Toxicity of Magnesium Potassium Phosphate Cement

Abstract:

Solidification / stabilization (S/S) is a popular method for treating solid wastes containing heavy metals. In recent years, it shows positive results of magnesium potassium phosphate cement as stabilizing agent. In the work, the influence of heavy metal Cu、Zn and Pb on magnesium phosphate cement and the leaching behavior of magnesium phosphate cement were studied. Two proportions of cements were employed with hard burned magnesia and potassium phosphate. The hydration products were analyzed by XRD showing that: Cu、Zn and Pb would not take on obvious effect during magnesium phosphate cement hydration process. Leaching toxicity tests showed that: Cu、Zn and Pb were immobilized within cement hydration products through physical fixation, adsorption mechanisms, and the results were far lower than that of the National Standard in China.

• Periodical: Applied Mechanics and Materials (Volumes 117-119)
• Pages: 1080-1083
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.117-119.1080
• Online since: October 2011
• Authors: Bao Guo Ma, Jing Ran Wang, Xiang Guo Li
• Keywords: Heavy Metal, Hydration, Leaching Toxicity, Magnesium Potassium Phosphate Cement

References

[1] Y.J. Park, J. Heo, Vitrification of fly ash from municipal solid waste incinerator, J. Hazard. Mater. 91 (2002) 83–93.

[2] C.S. Kirby, J.D. Rimstidt, Mineralogy and surface properties of municipal solid waste ash, Environ. Sci. Technol. 27 (1993) 652–660.

DOI: 10.1021/es00041a008

[3] C.J. Rosen, P.M. Bierman, D. Olson, Swiss chard and alfalfa responses to soil amended with municipal solid waste incinerator ash: growth and elemental composition, J. Agric. Food Chem. 42 (1994) 1361–1368.

DOI: 10.1021/jf00042a023

[4] P.M. Bierman, C.J. Rosen, Phosphate and trace metal availability from sewage sludge incineration ash, J. Environ. Qual. 23 (1994) 822–830.

DOI: 10.2134/jeq1994.00472425002300040030x

[5] J.E. Aubert, B. Husson, A. Vaquier, Use of municipal solid waste incineration fly ash in concrete, Cement Concrete Res. 34 (2004) 957–963.

DOI: 10.1016/j.cemconres.2003.11.002

[6] A. Kida, Y. Noma, T. Imada, Chemical speciation and leaching properties of elements in municipal incinerator ashes, Waste Manage. 16 (1996) 527–536.

DOI: 10.1016/s0956-053x(96)00094-3

[7] M.Y. Wey, K.Y. Liu, T.H. Tsai, J.T. Chou, The thermal treatment of the fly ash from municipal solid waste incinerator with rotary kiln, J. Hazard. Mater. 137 (2006) 981–989.

DOI: 10.1016/j.jhazmat.2006.03.024

[8] T.W. Cheng, T.H. Ueng, Y.S. Chen, J.P. Chiu, Production of glass-ceramic from incinerator fly ash, Ceram. Int. 28 (2002) 779–783.

DOI: 10.1016/s0272-8842(02)00043-3

[9] M. Aloisi, A. Karamanov, M. Pelino, Sintered glass-ceramic from municipal solid waste incinerator ashes, J. Non-Cryst. Solids 345–346 (2004) 192-196.

DOI: 10.1016/j.jnoncrysol.2004.08.021

[10] T. Mangialardi, Sintering of MSW fly ash for reuse as a concrete aggregate, J.Hazard. Mater. 87 (2001) 225–239.

DOI: 10.1016/s0304-3894(01)00286-2

[11] K.S. Wang, K.Y. Chiang, J.K. Perng, C.J. Sun, The characteristics study on sintering of municipal solid waste incinerator ashes, J. Hazard. Mater. 59 (1998)201–210.

DOI: 10.1016/s0304-3894(97)00147-7

[12] R. Malviya, R. Chaudhary, Factor affecting hazardous waste solidification/stabilization: a review, J. Hazard. Mater. 137 (2006) 267–276.

DOI: 10.1016/j.jhazmat.2006.01.065

[13] A.S. Wagh, Chemically Bonded Phosphate Ceramics. 21st Century Materials with Diverse Applications, Elsevier Science, London, 2004.

[14] D. Singh, B. Patel, A.S. Wagh, S.Y. Jeong, Modified phosphate ceramics for stabilization and solidification of salt mixed wastes, ANL/EP/CP-46686 (1998).