Behaviour of cerium(III) in the presence of components of soils and its humate complex
The behaviour of cerium, as a prototype of the lanthanide group, against the inorganic components of two types of soils (one from an Abisreligiosa forest (IM-F) and the other from a semiarid zone (IM-S)) was investigated. The pseudo-second order model applied to the kinetics adsorption data for both...
| Veröffentlicht in: | Environmental technology. - 1993. - 42(2021), 27 vom: 01. Nov., Seite 4363-4371 |
|---|---|
| 1. Verfasser: | |
| Weitere Verfasser: | , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2021
|
| Zugriff auf das übergeordnete Werk: | Environmental technology |
| Schlagworte: | Journal Article Cerium (III) adsorption parameters humate complexes soils Soil Water Pollutants, Chemical Cerium 30K4522N6T |
| Zusammenfassung: | The behaviour of cerium, as a prototype of the lanthanide group, against the inorganic components of two types of soils (one from an Abisreligiosa forest (IM-F) and the other from a semiarid zone (IM-S)) was investigated. The pseudo-second order model applied to the kinetics adsorption data for both soils indicated chemical adsorption; the equilibrium was reached in less than 4 h, the adsorption of Ce(III) in these conditions were 15.6 and 3.5 mg g-1 for IM-F and IM-S respectively. The adsorbents showed a buffer effect in alkali conditions, the adsorption was highest at 5 > pHeq < 6 for both adsorbents. The adsorption isotherms showed that the IM-F surface is homogeneous with a maximum adsorption capacity of 15.7 mg g-1 and that of IM-S is heterogeneous. IM-F is more efficient at low adsorbent dosage, whereas this parameter virtually does not affect the IM-S efficiency but the adsorption percentage increases as the dosage increases. The thermodynamic parameters showed an exothermic and chemical adsorption process using IM-F (ΔH0 = -96.6 KJ mol-1) and an endothermic and physicochemical process using IM-S (ΔH0 = 29 KJ mol-1). Finally, the competition of the adsorption by IM-F and the formation of the complex with humic acids showed the complex formation of Ce:(HA)n, (1:1) with a log βCe,HAapp=5.2 |
|---|---|
| Beschreibung: | Date Completed 10.11.2021 Date Revised 10.11.2021 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1479-487X |
| DOI: | 10.1080/09593330.2020.1758219 |