Effect of SiO2:Al2O3
In our investigation, it was found that the solidification characteristics of heavy metals in sintered ceramsite were strongly influenced by the mass ratios of (CaO + Fe2O3 + MgO)/(SiO2 + Al2O3) (defined as F/SA ratios, an important controlling parameter to optimize the components for production of ceramsite) (Figure S1, Supporting Information). In this study, to indicate the actual binding capacity for heavy metals provided by the structures of ceramsite, the effects of SiO2:Al2O3 and Fe2O3:CaO:MgO on the solidification of heavy metals under the condition of F/SA ratio = 0.275 were investigated. Simulated ratios of SiO2:Al2O3 (or Fe2O3:CaO:MgO) were prepared by adding the oxides (SiO2, Al2O3, Fe2O3, CaO, and MgO) to the raw materials. The mass ratios of SiO2:Al2O3 and Fe2O3:CaO:MgO are shown in Tables S5 and S6 (Supporting Information), respectively.
Effect of SiO2:Al2O3In our investigation, it was found that the solidification characteristics of heavy metals in sintered ceramsite were strongly influenced by the mass ratios of (CaO + Fe2O3 + MgO)/(SiO2 + Al2O3) (defined as F/SA ratios, an important controlling parameter to optimize the components for production of ceramsite) (Figure S1, Supporting Information). In this study, to indicate the actual binding capacity for heavy metals provided by the structures of ceramsite, the effects of SiO2:Al2O3 and Fe2O3:CaO:MgO on the solidification of heavy metals under the condition of F/SA ratio = 0.275 were investigated. Simulated ratios of SiO2:Al2O3 (or Fe2O3:CaO:MgO) were prepared by adding the oxides (SiO2, Al2O3, Fe2O3, CaO, and MgO) to the raw materials. The mass ratios of SiO2:Al2O3 and Fe2O3:CaO:MgO are shown in Tables S5 and S6 (Supporting Information), respectively.
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