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- W2014233430 abstract "The objective of this study was to investigate the synthesis of zeolites from paper sludge ash, and to evaluate their applications for water purification to simultaneously remove NH4 + and PO4 3 − in aqueous solution. Paper sludge ash had a low abundance of Si and a significant Ca content, due to the presence of calcite that was used as paper filler. Na2SiO3 was added to the NaOH solution to increase Si content in order to synthesize zeolites with high cation exchange capacity. The original ash without addition of Si yielded hydroxysodalite with a cation exchange capacity of ca. 50 cmol/kg. Addition of Si to the solution yielded Na-P1 (zeolite-P) with a higher cation exchange capacity (ca. 120 cmol/kg). The observed concentrations of Si and Al in the solution during the reaction explain crystallizations of these two phases. The product with Na-P1 could simultaneously remove NH4 + and PO4 3 − from the solution between pH 4 and 9." @default.
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- W2014233430 date "2007-01-31" @default.
- W2014233430 modified "2023-09-27" @default.
- W2014233430 title "Synthesis of zeolites from paper sludge ash and their ability to simultaneously remove NH<sub>4</sub> <sup>+</sup> and PO<sub>4</sub> <sup>3−</sup>" @default.
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- W2014233430 doi "https://doi.org/10.1080/10934520601144642" @default.
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