Competing Ion Exchange of Zn and Fe in NaY Zeolite
This study was aimed at investigating the equilibrium and interactive effects of binary solutions containing Zn +2 and Fe +3 ions in fixed-bed columns of NaY zeolite. To calculate the dynamic equilibrium through isotherms, experiments were carried out in a fixed-bed column. Reagent-grade ZnCl 2 and...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2012-04-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.30.4.275 |
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| author | Indianara C. Ostroski João H. Dantas Edson A. Silva Pedro A. Arroyo Maria A. S. D. Barros |
| author_facet | Indianara C. Ostroski João H. Dantas Edson A. Silva Pedro A. Arroyo Maria A. S. D. Barros |
| author_sort | Indianara C. Ostroski |
| collection | DOAJ |
| description | This study was aimed at investigating the equilibrium and interactive effects of binary solutions containing Zn +2 and Fe +3 ions in fixed-bed columns of NaY zeolite. To calculate the dynamic equilibrium through isotherms, experiments were carried out in a fixed-bed column. Reagent-grade ZnCl 2 and FeCl 3 ·6H 2 O solutions were mixed with deionized water to prepare the feed solutions with total ion concentrations in the range of 0.5–5.0 meq/ℓ. Experiments were then carried out using Fe 3+ and Zn 2+ ions in the following concentration ratios: 0.75:0.25, 0.50:0.50 and 0.25:0.75. The experimental equilibrium data were then described using Langmuir-type models (binary Langmuir model, Langmuir-type model, Jain and Snoeyink model, and noncompetitive Langmuir model) as well as ion exchange model. Results of our analysis revealed that NaY zeolite has a higher affinity for Zn 2+ than Fe 3+ ions. The equilibrium data were best fit to the Langmuir-type model. Zn 2+ ions are removed through an ion-exchange process while the Fe 3+ ions may be preferentially adsorbed onto the already exchanged zeolitic sites. This equilibrium model was then applied to a dynamic mathematical model. We describe the equilibrium in this model by assuming the binary Langmuir-type model and mass transfer in the zeolite based on the linear driving force model. |
| format | Article |
| id | doaj-art-9e515b30c1d047d48a54948324a97b9e |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2012-04-01 |
| publisher | SAGE Publishing |
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| series | Adsorption Science & Technology |
| spelling | doaj-art-9e515b30c1d047d48a54948324a97b9e2025-01-03T00:11:13ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382012-04-013010.1260/0263-6174.30.4.275Competing Ion Exchange of Zn and Fe in NaY ZeoliteIndianara C. Ostroski0João H. Dantas1Edson A. Silva2Pedro A. Arroyo3Maria A. S. D. Barros4 Institute of Chemistry, Federal University of Goiás, Câmpus Samambaia, CEP 74001-970, Goiânia, Goiás, Brazil Department of Chemical Engineering, State University of Maringá, 87020-900 Maringá, Paraná, Brazil Department of Chemical Engineering, West Paraná State University, 85903-000 Toledo, Brazil Department of Chemical Engineering, State University of Maringá, 87020-900 Maringá, Paraná, Brazil Department of Chemical Engineering, State University of Maringá, 87020-900 Maringá, Paraná, BrazilThis study was aimed at investigating the equilibrium and interactive effects of binary solutions containing Zn +2 and Fe +3 ions in fixed-bed columns of NaY zeolite. To calculate the dynamic equilibrium through isotherms, experiments were carried out in a fixed-bed column. Reagent-grade ZnCl 2 and FeCl 3 ·6H 2 O solutions were mixed with deionized water to prepare the feed solutions with total ion concentrations in the range of 0.5–5.0 meq/ℓ. Experiments were then carried out using Fe 3+ and Zn 2+ ions in the following concentration ratios: 0.75:0.25, 0.50:0.50 and 0.25:0.75. The experimental equilibrium data were then described using Langmuir-type models (binary Langmuir model, Langmuir-type model, Jain and Snoeyink model, and noncompetitive Langmuir model) as well as ion exchange model. Results of our analysis revealed that NaY zeolite has a higher affinity for Zn 2+ than Fe 3+ ions. The equilibrium data were best fit to the Langmuir-type model. Zn 2+ ions are removed through an ion-exchange process while the Fe 3+ ions may be preferentially adsorbed onto the already exchanged zeolitic sites. This equilibrium model was then applied to a dynamic mathematical model. We describe the equilibrium in this model by assuming the binary Langmuir-type model and mass transfer in the zeolite based on the linear driving force model.https://doi.org/10.1260/0263-6174.30.4.275 |
| spellingShingle | Indianara C. Ostroski João H. Dantas Edson A. Silva Pedro A. Arroyo Maria A. S. D. Barros Competing Ion Exchange of Zn and Fe in NaY Zeolite Adsorption Science & Technology |
| title | Competing Ion Exchange of Zn and Fe in NaY Zeolite |
| title_full | Competing Ion Exchange of Zn and Fe in NaY Zeolite |
| title_fullStr | Competing Ion Exchange of Zn and Fe in NaY Zeolite |
| title_full_unstemmed | Competing Ion Exchange of Zn and Fe in NaY Zeolite |
| title_short | Competing Ion Exchange of Zn and Fe in NaY Zeolite |
| title_sort | competing ion exchange of zn and fe in nay zeolite |
| url | https://doi.org/10.1260/0263-6174.30.4.275 |
| work_keys_str_mv | AT indianaracostroski competingionexchangeofznandfeinnayzeolite AT joaohdantas competingionexchangeofznandfeinnayzeolite AT edsonasilva competingionexchangeofznandfeinnayzeolite AT pedroaarroyo competingionexchangeofznandfeinnayzeolite AT mariaasdbarros competingionexchangeofznandfeinnayzeolite |