Incorporation Mechanism of Stabilizing Simulated Lead-Laden Sludge in Aluminum-Rich Ceramics
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Incorporation Mechanism of Stabilizing Simulated Lead-Laden Sludge in Aluminum-Rich Ceramics

Authors: Xingwen Lu, Kaimin Shih

Abstract:

This study investigated a strategy of blending lead-laden sludge and Al-rich precursors to reduce the release of metals from the stabilized products. Using PbO as the simulated lead-laden sludge to sinter with γ-Al2O3 by Pb:Al molar ratios of 1:2 and 1:12, PbAl2O4 and PbAl12O19 were formed as final products during the sintering process, respectively. By firing the PbO + γ-Al2O3 mixtures with different Pb/Al molar ratios at 600 to 1000 °C, the lead transformation was determined through X-ray diffraction (XRD) data. In Pb/Al molar ratio of 1/2 system, the formation of PbAl2O4 is initiated at 700 °C, but an effective formation was observed above 750 °C. An intermediate phase, Pb9Al8O21, was detected in the temperature range of 800-900 °C. However, different incorporation behavior for sintering PbO with Al-rich precursors at a Pb/Al molar ratio of 1/12 was observed during the formation of PbAl12O19 in this system. In the sintering process, both temperature and time effect on the formation of PbAl2O4 and PbAl12O19 phases were estimated. Finally, a prolonged leaching test modified from the U.S. Environmental Protection Agency-s toxicity characteristic leaching procedure (TCLP) was used to evaluate the durability of PbO, Pb9Al8O21, PbAl2O4 and PbAl12O19 phases. Comparison for the leaching results of the four phases demonstrated the higher intrinsic resistance of PbAl12O19 against acid attack.

Keywords: Sludge, Lead, Stabilization, Leaching behavior

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1070965

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References:


[1] R. Jalali, H. Ghafourian, Y. Asef, S. J. Davarpanah, S.Sepehr, "Removal and recovery of lead using nonliving biomass of marine algae." Journal of Hazardous Materials, vol. 92(3), pp. 253-262, 2002.
[2] V. K. Gupta, M. Gupta, S. Sharma, "Process development for the removal of lead and chromium from aqueous solutions using red mud - An aluminium industry waste." Water Research, vol. 35(5), pp. 1125-1134, 2001.
[3] K. Conrad, H. C. Bruun Hansen, "Sorption of zinc and lead on coir." Bioresource Technology, vol. 98(1), pp. 89-97, 2007.
[4] V. K. Gupta, S. Agarwal, T. A. Saleh, "Synthesis and characterization of alumina-coated carbon nanotubes and their application for lead removal." Journal of Hazardous Materials, vol. 185(1), pp. 17-23, 2011.
[5] S. W. Lin, R. M. F. Navarro, "An innovative method for removing Hg2+ and Pb2+ in ppm concentrations from aqueous media." Chemosphere, vol. 39(11), pp. 1809-1817, 1999.
[6] D. Petruzzelli, M. Pagano, G. Tiravanti, R. Passino, "Lead removal and recovery from battery wastewaters by natural zeolite clinoptilolite." Solvent Extraction and Ion Exchange, vol. 17(3), pp. 677-694, 1999.
[7] A. Saeed, M. Iqbal, M. W. Akhtar, "Removal and recovery of lead(II) from single and multimetal (Cd, Cu, Ni, Zn) solutions by crop milling waste (black gram husk)." Journal of Hazardous Materials, vol. 117(1), pp. 65-73, 2005.
[8] B. Dubey, T. Townsend, "Arsenic and lead leaching from the waste derived fertilizer ironite." Environmental Science and Technology, vol. 38(20), pp. 5400-5404, 2004.
[9] I. Ali, V. K.Gupta, "Advances in water treatment by adsorption technology." Nature Protocols, vol. 1(6), pp. 2661-2667, 2007.
[10] D. Laner, J. Fellner, P. H. Brunner, "Flooding of municipal solid waste landfills-An environmental hazard?" Science of the Total Environment, vol. 407(12), pp. 3674-3680, 2009.
[11] K. Shih, T. White, J. O. Leckie, "Spinel formation for stabilizing simulated nickel-laden sludge with aluminum-rich ceramic precursors." Environmental Science and Technology, vol. 40(16), pp. 5077-5083, 2006.
[12] K. Shih, T. White, J. O. Leckie, "Nickel stabilization efficiency of aluminate and ferrite spinels and their leaching behavior." Environmental Science and Technology, vol. 40(17), pp. 5520-5526, 2006.
[13] Y. Tang, K. Shih, K. Chan, "Copper aluminate spinel in the stabilization and detoxification of simulated copper-laden sludge." Chemosphere, vol. 80(4), pp. 375-380, 2010.
[14] C. Y. Hu, K. Shih, J. O. Leckie, "Formation of copper aluminate spinel and cuprous aluminate delafossite to thermally stabilize simulated copper-laden sludge." Journal of Hazardous Materials, vol. 181(1-3), pp. 399-404, 2010.
[15] G. Wendt, C. D. Meinecke, W. Schmitz, "Oxidative dimerization of methane on lead oxide-alumina catalysts." Applied Catalysis, vol. 45(2), pp. 209-220, 1988.
[16] S. E. Park, J. S. Chang, "Oxidative coupling of methane over PbO/PbAl2O4 catalysts." Studies in Surface Science and Catalysis, vol. 75, pp. 2233-2236, 1993.
[17] S. Chen, B. Zhao, P. C. Hayes, E. Jak, "Experimental study of phase equilibria in the PbO-Al2O3-SiO2 system." Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, vol. 32(6), pp. 997-1005, 2001.
[18] R. S. Zhou, R. L. Snyder, "Structures and transformation mechanisms of the eta, gamma and theta transition aluminas." Acta Crystallographica Section B, vol. 47(5), pp. 617-630, 1991.
[19] Y. Wang, C. Suryanarayana, L. An, "Phase transformation in nanometer-sized ╬│-alumina by mechanical milling." Journal of the American Ceramic Society, vol. 88(3), pp. 780-783, 2005
[20] R. F. Geller, E. N. Bunting, "Report on the systems lead oxide-alumina and lead oxide-alumina-silica." Journal of research of the National Bureau of Standards, vol. 31(5), pp. 255-270, 1943.
[21] A. Kukukova, J. Aubin, S. M. Kresta, "A new definition of mixing and segregation: Three dimensions of a key process variable." Chemical Engineering Research and Design, vol. 87(4), pp. 633-647, 2009.
[22] U. Kuxmann, P. Fischer, "Lead monoxide-aluminum oxide, lead monoxide-calcium oxide, and lead monoxide-silicon dioxide phase diagrams." Erzmetall, vol. 27(11), pp. 533-537, 1974.
[23] E. J. Kim, J. E. Herrera, D. Huggins, J. Braam, S. Koshowski, "Effect of pH on the concentrations of lead and trace contaminants in drinking water: A combined batch, pipe loop and sentinel home study." Water Research, vol. 45(9), pp. 2763-2774, 2011.
[24] E. J. Kim, J. E. Herrera, "Characteristics of lead corrosion scales formed during drinking water distribution and their potential influence on the release of lead and other contaminants." Environmental Science and Technology, vol. 44(16), pp. 6054-6061, 2010.