Microstructural and Equilibrium Adsorption Study of the System of Waste Foundry Molding Sand/Cu (II) Ions
This paper deals with the waste foundry molding sand which originally comes from the casting production. Adsorption of Cu (II) ions on the waste foundry molding sand was studied. Experimental data were processed using adsorption isotherms. Obtained results show that the experimental data are best de...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2016-12-01
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| Series: | Archives of Metallurgy and Materials |
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| Online Access: | http://www.degruyter.com/view/j/amm.2016.61.issue-4/amm-2016-0292/amm-2016-0292.xml?format=INT |
| _version_ | 1819018821665554432 |
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| author | Strkalj A. Glavas Z. Slokar L. |
| author_facet | Strkalj A. Glavas Z. Slokar L. |
| author_sort | Strkalj A. |
| collection | DOAJ |
| description | This paper deals with the waste foundry molding sand which originally comes from the casting production. Adsorption of Cu (II) ions on the waste foundry molding sand was studied. Experimental data were processed using adsorption isotherms. Obtained results show that the experimental data are best described by the Langmuir isotherm. The following adsorption capacities are obtained: 7.153 mg/g to 293 K, 8.403 mg/g at 333 K and 9.208 mg/g at 343 K. The kinetics and thermodynamics of the process were analysed. The obtained results indicate that the adsorption process takes place according to the pseudo second order kinetic model with the following constants: 0.438 g/mg min at 293 K, 0.550 g/mg min at 333 K and 1.872 g/mg min at 343 K. The following values of ΔG° were obtained: − 95.49 J/mol at 293 K, − 736.99 J/mol at 333 K and − 1183.46 J/mol at 343 K. The value of ΔH° is − 4.16 kJ/mol and the value of ΔS° is 15.17 J/molK. These results were confirmed by microscopic examinations. The results indicate that the adsorption process of Cu (II) ions on waste foundry molding sand is possible. Results of microscopic examinations show the homogeneity of the surface, which is proof of the chemisorption. Cu (II) ions on the surface of the waste foundry molding sand were detected after adsorption by EDS analysis, which proves the existence of the adsorption process. |
| first_indexed | 2024-12-21T03:25:31Z |
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| id | doaj.art-d8dd34a07f22429d93bdf7af1d4d84df |
| institution | Directory Open Access Journal |
| issn | 2300-1909 |
| language | English |
| last_indexed | 2024-12-21T03:25:31Z |
| publishDate | 2016-12-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Metallurgy and Materials |
| spelling | doaj.art-d8dd34a07f22429d93bdf7af1d4d84df2022-12-21T19:17:36ZengPolish Academy of SciencesArchives of Metallurgy and Materials2300-19092016-12-016141805181210.1515/amm-2016-0292amm-2016-0292Microstructural and Equilibrium Adsorption Study of the System of Waste Foundry Molding Sand/Cu (II) IonsStrkalj A.0Glavas Z.1Slokar L.2 University of Zagreb, Faculty of Metallurgy, Aleja Narodnih Heroja 3, 44103 Sisak, Croatia University of Zagreb, Faculty of Metallurgy, Aleja Narodnih Heroja 3, 44103 Sisak, Croatia University of Zagreb, Faculty of Metallurgy, Aleja Narodnih Heroja 3, 44103 Sisak, CroatiaThis paper deals with the waste foundry molding sand which originally comes from the casting production. Adsorption of Cu (II) ions on the waste foundry molding sand was studied. Experimental data were processed using adsorption isotherms. Obtained results show that the experimental data are best described by the Langmuir isotherm. The following adsorption capacities are obtained: 7.153 mg/g to 293 K, 8.403 mg/g at 333 K and 9.208 mg/g at 343 K. The kinetics and thermodynamics of the process were analysed. The obtained results indicate that the adsorption process takes place according to the pseudo second order kinetic model with the following constants: 0.438 g/mg min at 293 K, 0.550 g/mg min at 333 K and 1.872 g/mg min at 343 K. The following values of ΔG° were obtained: − 95.49 J/mol at 293 K, − 736.99 J/mol at 333 K and − 1183.46 J/mol at 343 K. The value of ΔH° is − 4.16 kJ/mol and the value of ΔS° is 15.17 J/molK. These results were confirmed by microscopic examinations. The results indicate that the adsorption process of Cu (II) ions on waste foundry molding sand is possible. Results of microscopic examinations show the homogeneity of the surface, which is proof of the chemisorption. Cu (II) ions on the surface of the waste foundry molding sand were detected after adsorption by EDS analysis, which proves the existence of the adsorption process.http://www.degruyter.com/view/j/amm.2016.61.issue-4/amm-2016-0292/amm-2016-0292.xml?format=INTwaste foundry molding sandCu (II) ionsadsorptionSEM/EDS analysis |
| spellingShingle | Strkalj A. Glavas Z. Slokar L. Microstructural and Equilibrium Adsorption Study of the System of Waste Foundry Molding Sand/Cu (II) Ions Archives of Metallurgy and Materials waste foundry molding sand Cu (II) ions adsorption SEM/EDS analysis |
| title | Microstructural and Equilibrium Adsorption Study of the System of Waste Foundry Molding Sand/Cu (II) Ions |
| title_full | Microstructural and Equilibrium Adsorption Study of the System of Waste Foundry Molding Sand/Cu (II) Ions |
| title_fullStr | Microstructural and Equilibrium Adsorption Study of the System of Waste Foundry Molding Sand/Cu (II) Ions |
| title_full_unstemmed | Microstructural and Equilibrium Adsorption Study of the System of Waste Foundry Molding Sand/Cu (II) Ions |
| title_short | Microstructural and Equilibrium Adsorption Study of the System of Waste Foundry Molding Sand/Cu (II) Ions |
| title_sort | microstructural and equilibrium adsorption study of the system of waste foundry molding sand cu ii ions |
| topic | waste foundry molding sand Cu (II) ions adsorption SEM/EDS analysis |
| url | http://www.degruyter.com/view/j/amm.2016.61.issue-4/amm-2016-0292/amm-2016-0292.xml?format=INT |
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