- Tytuł:
- Adsorption of La3+ and Dy3+ ions on biohydroxyapatite obtained from pork bones gasified with steam
- Autorzy:
-
Szczepaniak, W.
Zabłocka-Malicka, M.
Pasiecznik, I.
Pohl, P.
Rutkowski, P. - Powiązania:
- https://bibliotekanauki.pl/articles/208230.pdf
- Data publikacji:
- 2018
- Wydawca:
- Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
- Tematy:
-
isotherms
Freundlich models
steam gasification
izoterma
zgazowanie parą wodną
modele Freundlich'a - Opis:
- Adsorption of La3+ and Dy3+ from their aqueous nitrate solutions on biohydroxyapatite (BHAP) originally prepared from raw pork bones by steam gasification of has been investigated for the La3+and Dy3+ concentrations within the range of 1.44·10–4–8.06·10–3 mol/dm3 and 2.71·10–5 5.68·10–3 mol/dm3, respectively. It was found that saturation of the lanthanide uptake occurred at 0.0625 moles of Ln3+ per mole of BHAP. Two model isotherms, i.e., Langmuir (qe = qmCe/((1/KL) + Ce)) and Freundlich (logqe = logKF + (1/n)logCe), were used to fit the adsorption data. The following isotherm parameters were found for La3+: qm = 0.1265 mol/kg, KL = 2701 dm3/mol, n = 5.61, KF = 0.283 (mol/kg)·(dm3/mol)1/n and for Dy3+: qm = 0.1223 mol/kg, KL = 3635 dm3/mol, n = 5.82, KF = 0.306(mol/kg)·(dm3/mol)1/n. A better correlation was found for the Freundlich model. A relatively high value of the n parameter in the Freundlich equation suggests heterogeneous chemisorption of lanthanide ions.
- Źródło:
-
Environment Protection Engineering; 2018, 44, 1; 29-40
0324-8828 - Pojawia się w:
- Environment Protection Engineering
- Dostawca treści:
- Biblioteka Nauki
Artykuł