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Microstructural and equilibrium adsorption study of the system of waste foundry molding sand/Cu(II)ions (CROSBI ID 242792)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Štrkalj, Anita ; Glavaš, Zoran ; Slokar, Ljerka Microstructural and equilibrium adsorption study of the system of waste foundry molding sand/Cu(II)ions // Archives of metallurgy and materials, 61 (2016), 4; 1805-1812. doi: 10.1515/amm-2016-0292

Podaci o odgovornosti

Štrkalj, Anita ; Glavaš, Zoran ; Slokar, Ljerka

engleski

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 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 Δ G° 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 Δ H° is - 4.16 kJ/mol and the value of Δ S° 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.

waste foundry molding sand ; Cu (II) ions ; adsorption ; SEM/EDS analysis

Potpora- Štrkalj; Glavni autori: Anita Štrkalj, Ljerka Slokar

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Podaci o izdanju

61 (4)

2016.

1805-1812

objavljeno

1733-3490

2300-1909

10.1515/amm-2016-0292

Povezanost rada

Metalurgija

Poveznice
Indeksiranost