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פותח על ידי קלירמאש פתרונות בע"מ -
Phosphorus adsorption by kaolinite and montmorillonite: I. Effect of time, ionic strength, and pH
Year:
1988
Authors :
בר-יוסף, בניהו
;
.
רוזנברג, רבקה
;
.
Volume :
52
Co-Authors:

Kafkafi, U.
Sposito, G.

Facilitators :
From page:
1580
To page:
1585
(
Total pages:
6
)
Abstract:
Phosphate reactions in soils are affected by various factors operating simultaneously. The objective of this work was to study specific effects of total P concentration, pH, ionic strength, and equilibration time on P partitioning between solid and solution phases of Ca- and K-kaolinite and -montmorillonite suspensions as model systems of soils containing these minerals decreased Cp in both clay systems. Phosphorus adsorption by Ca-clay exceeded that by K-clay. This, and the effect of EC on Cp are suggested to operate via their effect on the extent of the diffuse double layer, which determine the accessibility of P to adsorption sites on clays' edges. Phosphorus solution concentration as a function of pH was minimal in the studied clays around pH 6. In the investigated pH range (5-9), P partitioning was controlled by adsorption, which could be described by a modified Langmuir model. The model accounts for effects of Cp and pH on adsorption and considers retention of individual P species by the adsorbent. -from Authors
Note:
Related Files :
acidity dependence
Clay Minerals--Adsorption
Kaolinite
Montmorillonite
phosphate reachons
phosphorus concentration
taolinite
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
Language:
אנגלית
Editors' remarks:
ID:
22708
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:53
Scientific Publication
Phosphorus adsorption by kaolinite and montmorillonite: I. Effect of time, ionic strength, and pH
52

Kafkafi, U.
Sposito, G.

Phosphorus adsorption by kaolinite and montmorillonite: I. Effect of time, ionic strength, and pH
Phosphate reactions in soils are affected by various factors operating simultaneously. The objective of this work was to study specific effects of total P concentration, pH, ionic strength, and equilibration time on P partitioning between solid and solution phases of Ca- and K-kaolinite and -montmorillonite suspensions as model systems of soils containing these minerals decreased Cp in both clay systems. Phosphorus adsorption by Ca-clay exceeded that by K-clay. This, and the effect of EC on Cp are suggested to operate via their effect on the extent of the diffuse double layer, which determine the accessibility of P to adsorption sites on clays' edges. Phosphorus solution concentration as a function of pH was minimal in the studied clays around pH 6. In the investigated pH range (5-9), P partitioning was controlled by adsorption, which could be described by a modified Langmuir model. The model accounts for effects of Cp and pH on adsorption and considers retention of individual P species by the adsorbent. -from Authors
Scientific Publication
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