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- W2072993921 abstract "Changes in the porous structure of fly ashes ZS-13 subjected to chemical treatment with solutions of NaOH, NaOH/NH4HCO3, EDTA, and HCl are examined. The initial material with 3 m2/g surface area and 0.01 cm3/g pore volume after modification revealed an increased surface area and pore volume. The greatest increase in the surface area equal to 105 m2/g was noted for the sample treated with HCl, while the greatest increase in pore volume equal to 0.18 cm3/g was obtained for the sample treated with EDTA. In the modified products, meso- and macropores prevail, although in the sample treated with HCl, the presence of a small contribution of micropores was detected. All the modifications, except that treated with HCl, were found to contain slit-shaped macropores. In the sample treated with HCl, the pores were in the shape of nonparallel plates. A study by scanning electron microscopy (SEM) allowed a detailed determination of the shape of the isles and agglomerates. Chemical treatment of the initial fly ashes resulted in a transformation of the ball-shaped agglomerations into different products characterised by specific size and shape of particles." @default.
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- W2072993921 date "2002-02-01" @default.
- W2072993921 modified "2023-10-07" @default.
- W2072993921 title "Porous structure of waste fly ashes and their chemical modifications" @default.
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- W2072993921 doi "https://doi.org/10.1016/s0032-5910(01)00431-4" @default.
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