Abstract
In the present study the effect of SO42- and HPO42- on ion exchange of Cu2+, Fe3+ and Cr3+ on natural clinoptilolite is examined under normality of 0.01 N, temperature of 25 ± 2 °C and pH 2-2.5 after four days of equilibration. It is observed that Cu2+ uptake is significantly decreased in the presence of HPO42- and SO42. The observed effect is less significant for Fe3+ and Cr3+ in the presence of SO42- and HPO42- respectively. This could possibly be due to the metal-anion complex formation and the nature and charges of the complex species present. Blank solutions show precipitation in the case of Fe3+/HPO42- solution, leading in complete removal of Fe3+ from solutions. Precipitation along with ion exchange is resulting in higher removal of Fe3+ from the solution than ion exchange or precipitation alone. Finally, anion co-removal is significant, reaching 80% for HPO42- ions.
Original language | English |
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Pages (from-to) | 167-171 |
Number of pages | 5 |
Journal | Microporous and Mesoporous Materials |
Volume | 61 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - Jul 18 2003 |
Keywords
- Adsorption
- Anion complexes
- Clinoptilolite
- Heavy metals
- Ion exchange
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials