Abstract
Fly ash (FA) for reuse as a construction material is activated using two methods, to produce hydrated silicate and geopolymer gels. We investigated the solidification/stabilization and leaching behavior of PbCl2 in a geopolymer matrix (GM) and hydrated silicate matrix (HSM), based on FA as the source material, to evaluate the environmental and health risks. The GM and HSM synthetic conditions were 60 °C, 20 % relative humidity (RH), and 12 wt% (6 mol/L) NaOH, and 20 ± 2 °C, ≥90 % RH, and 30 wt.%, respectively, based on their compressive strength performances. X-ray diffraction (XRD) showed that Pb participated in hydration and geopolymerization, and was incorporated in the structural components of the hydrated silicate and geopolymer. In leaching experiments, the solidification/stabilization effects of Pb and Cl in the HSM and GM improved with increasing curing time. After long-term curing (28 days), the immobility of Pb in the GM was better than that in the HSM. Sodalite improved the Cl-stabilizing ability of the GM compared with that of the HSM. In static monolithic leaching experiments, HSM and GM had the same Pb-leaching behaviors. Based on the changes in the location of the neutral sphere layer with decreasing acid-neutralizing capacity, Pb release was divided into alkaline-release, stagnation, and acid-release stages. The neutral sphere layer contained the highest Pb concentration during permeation toward the block center from the block edge. This behavior regulation could also apply to other amphoteric metals immobilized by GMs and HSMs.
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Álvarez-Ayuso E, Querol X, Plana F, Alastuey A, Moreno N, Izquierdo M, Font O, Moreno T, Diez S, Vázquez E, Barra M (2008) Environmental, physical and structural characterisation of geopolymer matrixes synthesised from coal (co-)combustion fly ashes. J Hazard Mater 154:175–183. doi:10.1016/j.jhazmat.2007.10.008
Arya C, Xu Y (1995) Effect of cement type on chloride binding and corrosion of steel in concrete. Cem Concr Res 25:893–902
Banfalvi G, Sarvari A, Nagy G (2012) Chromatin changes induced by Pb and Cd in human cells. Toxicol In Vitro 26:1064–1071. doi:10.1016/j.tiv.2012.03.016
Buchwald A, Hilbig H, Kapps C (2007) Alkali-activated metakaolin-slag blends—performance and structure in dependence on their composition. J Mater Sci 42:3024–3032. doi:10.1007/s10853-006-0525-6
Chen QY, Tyrer M, Hills CD, Yang XM, Carey P (2009) Immobilisation of heavy metal in cement-based solidification stabilisation a review. Waste Manag 29:390–403. doi:10.1016/j.wasman.2008.01.019
China Bricks & Tiles Industrial Association (2011) The 12th five-year plan from China Bricks & Tiles Industrial Association. http://www.cbtia.com/news/2012/5-22/H14910705.shtml. Accessed May 2012 (In Chinses)
China Building Materials Federation (2012) Statistical analysis report of cement output and productivity in 2011. China Cem 3:10–12 (In Chinses)
Chindaprasirt P, Jaturapitakkul C, Chalee W, Rattanasak U (2009) Comparative study on the characteristics of fly ash and bottom ash geopolymers. Waste Manag 29:539–543. doi:10.1016/j.wasman.2008.06.023
Cocke DL (1990) The binding chemistry and leaching mechanisms of hazardous substances in cementitious solidification/stabilization systems. J Hazard Mater 24:231–253
De Silva P, Sagoe-Crenstil K (2008) Medium-term phase stability of Na2O–Al2O3–SiO2–H2O geopolymer systems. Cem Concr Res 38:870–876. doi:10.1016/j.cemconres.2007.10.003
Duxson P, Provis JL, Lukey GC, Van Deventer JJS (2007) The role of inorganic polymer technology in the development of ‘Green concrete’. Cem Concr Res 37:1590–1597. doi:10.1016/j.cemconres.2007.08.018
Gollmann MAC, Da Silva MM, Masuero NB, Dos Santos JOHZ (2010) Stabilization and solidification of Pb in cement matrices. J Hazard Mater 179:507–514. doi:10.1016/j.jhazmat.2010.03.032
Guo X, Shi H, Dick WA (2010) Compressive strength and microstructural characteristics of class C fly ash geopolymer. Cem Concr Compos 32:142–147. doi:10.1016/j.cemconcomp.2009.11.003
Hanjitsuwan S, Hunpratub S, Thongbai P, Maensiri S, Sata V, Chindaprasirt P (2014) Effects of NaOH concentrations on physical and electrical properties of high calcium fly ash geopolymer paste. Cem Concr Compos 45:9–14. doi:10.1016/j.cemconcomp.2013.09.012
Hwan-Young K, Jeong-Guk K, In-Tae K, Hwan-Seo P (2009) Study on the leaching behavior of salt waste forms prepared by using zeolite and lime glass. J Ind Eng Chem 15:293–298. doi:10.1016/j.jiec.2008.11.009
Izquierdo M, Querol X, Davidovits J, Antenucci D, Nugteren H, Fernández-Pereira C (2009) Coal fly ash-slag-based geopolymers: microstructure and metal leaching. J Hazard Mater 166:561–566. doi:10.1016/j.jhazmat.2008.11.063
Janusa MA, Champagne CA, Fanguy JC, Heard GE, Laine PL, Landry AA (2000) Solidification/stabilization of lead with the aid of bagasse as an additive to Portland cement. Microchem J 65:255–259
Jianguo Z, John LP, Dingwu F, Jannie SJVD (2008) Geopolymers for immobilization of Cr6+, Cd2+, and Pb2+. J Hazard Mater 157:587–598. doi:10.1016/j.jhazmat.2008.01.053
Josef-Christian B, Karsten S, Lars R (2011) Nanocrystalline sodalite grown from superalkaline NaCl bearing gels at low temperature (333 K) and the influence of TEA on crystallization process. Microporous Mesoporous Mater 142:666–671. doi:10.1016/j.micromeso.2011.01.020
Lancellotti I, Kamseu E, Michelazzi M, Barbieri L, Corradi A, Leonelli C (2010) Chemical stability of geopolymers containing municipal solid waste incinerator fly ash. Waste Manag 30:673–679. doi:10.1016/j.wasman.2009.09.032
Lee D (2006) Effect of calcite on Pb-doped solidified waste forms in leaching. Chemosphere 63:1903–1911. doi:10.1016/j.chemosphere.2005.10.018
Lee J, Freeman JL (2014) Zebrafish as a model for investigating developmental lead (Pb) neurotoxicity as a risk factor in adult neurodegenerative disease: a mini-review. Neurotoxicology. doi:10.1016/j.neuro.2014.03.008
Lin SL, Cross WH, Chian ESK, Lai JS, Giabbai M, Hung CH (1996) Stabilization and solidification of lead in contaminated soils. J Hazard Mater 48:95–110
Lloyd RR, Provis JL, Van Deventer JJS (2009) Microscopy and microanalysis of inorganic polymer cements. 1: remnant fly ash particles. J Mater Sci 44:608–619. doi:10.1007/s10853-008-3077-0
Ministry of Industry and Information Technology of the People’s Republic of China (2011) The 12th five-year plan of major industrial waste solid comprehensive utilization. http://www.miit.gov.cn/n11293472/n11293832/n11293907/n11368223/14416612.html. Accessed Jan 2012. (In Chinses)
Mohammad ZI, Lionel JJC, Ernest KY (2004a) A two-front leach model for cement-stabilized heavy metal waste. Environ Sci Technol 38:1522–1528. doi:10.1021/es0348400
Mohammad ZI, Lionel JJC, Ernest KY (2004b) Effect of remineralization on heavy-metal leaching from cement-stabilized/solidified waste. Environ Sci Technol 38:1561–1568. doi:10.1021/es034659r
Nath SK, Kumar S (2013) Influence of iron making slags on strength and microstructure of fly ash geopolymer. Constr Build Mater 38:924–930. doi:10.1016/j.conbuildmat.2012.09.070
Ogundiran MB, Nugteren HW, Witkamp GJ (2013) Immobilisation of lead smelting slag within spent aluminate—fly ash based geopolymers. J Hazard Mater 248:29–36. doi:10.1016/j.jhazmat.2012.12.040
Olivia M, Nikraz H (2012) Properties of fly ash geopolymer concrete designed by Taguchi method. Mater Des 36:191–198. doi:10.1016/j.matdes.2011.10.036
Onisei S, Pontikes Y, Van Gerven T, Angelopoulos GN, Velea T, Predica V, Moldovan P (2012) Synthesis of inorganic polymers using fly ash and primary lead slag. J Hazard Mater 205:101–110. doi:10.1016/j.jhazmat.2011.12.039
Philip JM, Mark TW (1995) Synthesis, structure, and characterization of halate sodalites:M8[AlSiO4]6(XO3)x(OH)2-x; M = Na, Li, or K; X = Cl, Br, or I. Zeolites 15:561–568
Phoo-ngernkham T, Chindaprasirt P, Sata V, Hanjitsuwan S, Hatanaka S (2014) The effect of adding nano-SiO2 and nano-Al2O3 on properties of high calcium fly ash geopolymer cured at ambient temperature. Mater Des 55:58–65. doi:10.1016/j.matdes.2013.09.049
Provis JL, Van Deventer JJS (2009) Geopolymers: structures, processing, properties and industrial applications. CRC Press, Boca Raton
Radu B, Zoltan R, Ligia TB (2005) Release dynamic process identification for a cement based material in various leaching conditions. Part I Influence of leaching conditions on the release amount. J Environ Manag 74:141–151. doi:10.1016/j.jenvman.2004.06.016
Rhan G, Kürklü GK (2014) The influence of the NaOH solution on the properties of the fly ash-based geopolymer mortar cured at different temperatures. Compos Part B 58:371–377. doi:10.1016/j.compositesb.2013.10.082
Rovnaník P (2010) Effect of curing temperature on the development of hard structure of metakaolin-based geopolymer. Constr Build Mater 24:1176–1183. doi:10.1016/j.conbuildmat.2009.12.023
Shaheen SM, Hooda PS, Tsadilas CD (2014) Opportunities and challenges in the use of coal fly ash for soil improvements—a review. J Environ Manag 145:249–267. doi:10.1016/j.jenvman.2014.07.005
Temuujin J, van Riessen A (2009) Effect of fly ash preliminary calcination on the properties of geopolymer. J Hazard Mater 164:634–639. doi:10.1016/j.jhazmat.2008.08.065
Temuujin J, van Riessen A, Williams R (2009) Influence of calcium compounds on the mechanical properties of fly ash geopolymer pastes. J Hazard Mater 167:82–88. doi:10.1016/j.jhazmat.2008.12.121
Temuujin J, Minjigmaa A, Lee M, Chen-Tan N, van Riessen A (2011) Characterisation of class F fly ash geopolymer pastes immersed in acid and alkaline solutions. Cem Concr Compos 33:1086–1091. doi:10.1016/j.cemconcomp.2011.08.008
Valérie C, Rudy S (2008) The application of pHstat leaching tests to assess the pH-dependent release of trace metals from soils, sediments and waste materials. J Hazard Mater 158:185–195. doi:10.1016/j.jhazmat.2008.01.058
Van Deventer JSJ, Provis JL, Duxson P (2012) Technical and commercial progress in the adoption of geopolymer cement. Miner Eng 29:89–104. doi:10.1016/j.mineng.2011.09.009
Xu H, Li Q, Shen L, Wang W, Zhai J (2010) Synthesis of thermostable geopolymer from circulating fluidized bed combustion (CFBC) bottom ashes. J Hazard Mater 175:198–204. doi:10.1016/j.jhazmat.2009.09.149
Yoshinaga J, Yamasaki K, Yonemura A, Ishibashi Y, Kaido T, Mizuno K, Takagi M, Tanaka A (2014) Lead and other elements in house dust of Japanese residences—source of lead and health risks due to metal exposure. Environ Pollut 189:223–228. doi:10.1016/j.envpol.2014.03.003
Zain MFM, Islam MN, Radin SS, Yap SG (2004) Cement-based solidification for the safe disposal of blasted copper slag. Cem Concr Compos 26:845–851. doi:10.1016/j.cemconcomp.2003.08.002
Zhengjia Y, Yanjun H (2008) The practical production technology of non-burnt brick. Chemical Industry Press, Beijing (In Chinses)
Acknowledgments
This work was supported by the State Environment Protection Commonweal Special Program, China (No. 201209023); the National Science & Technology Pillar Program, China (No. 2014BAL02B01); the Sino-Norwegian project phase II (CHN 2150 09/059).
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Li, Y., Gao, X., Wang, Q. et al. Solidification/stabilization and leaching behavior of PbCl2 in fly-ash hydrated silicate matrix and fly-ash geopolymer matrix. Environ Sci Pollut Res 22, 6877–6885 (2015). https://doi.org/10.1007/s11356-014-3816-5
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DOI: https://doi.org/10.1007/s11356-014-3816-5