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Stabilization of Heavy Metals in Ceramsite Obtained from Blast Furnace Slag and Sewage Sludge
Corresponding Author(s) : Z.L. Wang
Asian Journal of Chemistry,
Vol. 25 No. 8 (2013): Vol 25 Issue 8
Abstract
To develop the application of the manufacturing of the ceramsite from blast furnace slag and sewage sludge, the stabilization of Cu and Ni is studied under some experimental environment such as the preheating and sintering temperature, pH and HNO3 condition. The results show that with the increase of the preheating temperature, the leaching concentration and leaching rate of Cu and Ni have a significant decrease especially the temperature from 300 to 400 ºC. The influence of the preheating temperature on the leaching concentration and leaching rate is obvious. The leaching concentration of Cu and Ni gradually decreases as the sintering temperature increases and the sintering temperature has a important influence on the leaching concentration. The leaching rate of Cu and Ni gradually declines with the increase of the sintering temperature when the contents of Cu and Ni only are 100 mg kg-1. As pH = 1, both the leaching concentration and leaching rate of Cu and Ni are maximum. Except pH = 1, the influence of the variation of pH on the leaching concentration and leaching rate of Cu and Ni is very less. The oxidative condition of HNO3 has not a obvious influence on the leaching concentration and leaching rate except the HNO3 concentration = 0.5 mol L-1.
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- H.B. Duan, Q.F. Huang, Q. Wang, B.Y. Zhou and J.H. Li, J. Hazard. Mater., 158, 221 (2008).
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- Y.S. Liu and Y.S. Liu, Environ. Sci. Technol., 39, 3855 (2005).
- M.D. Ho and G.J. Evans, Environ. Sci. Technol., 34, 1030 (2000).
References
H.B. Duan, Q.F. Huang, Q. Wang, B.Y. Zhou and J.H. Li, J. Hazard. Mater., 158, 221 (2008).
P.T. Nguyen, M. Yasuhiro and F. Takeshi, J. Environ. Manage., 91, 2307 (2010).
M. Alexandre, D. Filipe and S. Viriato, Waste Manage., 26, 1477 (2006).
P. Ashish, M.G. Dastidar and T.R. Sreekrishnan, J. Environ. Manage., 90, 2343 (2009).
T. Montse and R. Joan, Sci. Total Environ., 363, 11 (2006).
G.R. Xu, J.L. Zou and G.B. Li, J. Hazard. Mater., 153, 1031 (2008).
G.R. Xu, J.L. Zou and G.B. Li, Water Res., 44, 2930 (2010).
F. Bellmann and J. Stark, Cement Concrete Res., 39, 644 (2009).
Y.S. Zhang, W. Sun, Q.L. Chen and L. Chen, J. Hazard. Mater., 143, 206 (2007).
Y.S. Liu and Y.S. Liu, Environ. Sci. Technol., 39, 3855 (2005).
M.D. Ho and G.J. Evans, Environ. Sci. Technol., 34, 1030 (2000).