Zeolitic material synthesised from fly ash: use as cationic exchanger

✍ Scribed by R Juan; S Hernández; X Querol; J M Andrés; N Moreno

• Publisher: Wiley (John Wiley & Sons)
• Year: 2002
• Tongue: English
• Weight: 130 KB
• Volume: 77
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/jctb.587

✦ Synopsis

Abstract

The potential use as a ‘once through’ cation exchanger of a zeolitic material (NaP1 zeolite as the main active component) synthesised from fly ash has been evaluated and compared with a commercial weak acid exchanger, Amberlite IRC‐50. The cationic exchange has been tested for different cations present in sewage: NH~4~^+^ (urban sewage) and Pb^2+^, Zn^2+^ and Cr^3+^ (waste from electrolytic baths). The NH~4~^+^ retention capacity was higher in the zeolite (0.7 meq g^−1^) than in Amberlite IRC‐50 (0.21 meq g^−1^). The retention capacities of metallic cations obtained for NaP1 zeolite (1.16 meq Pb^2+^ g^−1^, 1.45 meq Zn^2+^ g^−1^ and 1.57 meq Cr^3+^ g^−1^) were also higher than in Amberlite IRC‐50 (0.32 meq Pb^2+^ g^−1^, 0.25 meq Zn^2+^ g^−1^ and 0.35 meq Cr^3+^ g^−1^). When solutions containing all the metallic cations were used, lower retention capacities were obtained for both exchangers.

© 2002 Society of Chemical Industry