Effect of Pb+2 ion on physico chemical properties of fly ash -slag geopolymer pastes | ||||
| Journal of Scientific Research in Science | ||||
| Article 7, Volume 38, part 1 (Basic Sciences), January 2021, Page 118-138 PDF (963.04 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jsrs.2021.210660 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
S. Helall  1; Doaa A. Ahmed2; Sheren M. Ragei2
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| 1Chemistry Dep., Faculty of Girls, Ain Shams University, Cairo, Egypt | ||||
| 2Chemistry Department, Faculty of Women for Arts, Science and Education, Ain-Shams University, Cairo, Egypt. | ||||
| Abstract | ||||
| The aim of this work is to examine the stabilization or immobilization of heavy metals such as Pb (NO3)2 in a various paste of slag and slag-FA based and on geopolymer pastes. Geopolymer prepared by 100% slag and partially substitution of slag by 15% Fly ash (FA) [85% slag+15%FA]. The alkaline activator is (1:1) liquid sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) solution (the concentration of sodium hydroxide is 5 Molar). Different percentages of Pb (NO3)2 were added to the alkali activation mixture, 0.5%, and 1% by mass% of the solid binder. The obtained geopolymer specimens are cured in water for 90 days. The compressive strength test, combined water content, X-ray diffraction (XRD), Atomic absorption, and Transform infrared spectrometry (FTIR) are examined. The results showed that the used lead nitrate caused a retarding effect for the hydration of the investigated geopolymer mixes.The best mix for immobilization were 99.98% in mix SF1[85%slag+15%Fly ash +0.5%Pb+2]. | ||||
| Keywords | ||||
| Geopolymer Slag; Fly ash; Immobilization; Leaching | ||||
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