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Effects of fulvic acid and ph on zinc sorption on montmorillonite
Year:
1988
Source of publication :
Soil Science
Authors :
Bar-Tal, Asher
;
.
Bar-Yosef, Bnayahu
;
.
Volume :
146
Co-Authors:
Bar-Tal, A., Institute of Soils and Water, ARO, The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Bar-Yosef, B., Institute of Soils and Water, ARO, The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Chen, Y., The Seagram Center for Soil and Water Sciences, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot, Israel
Facilitators :
From page:
367
To page:
373
(
Total pages:
7
)
Abstract:
The objective of this work was to study the interaction between fulvic acid (FA) and Zn sorption in montmorillonite suspensions at various pH levels in order to elucidate the role of FA in solubilizing soil Zn. Increases in FA solution concentration up to 1.2 mM resulted in an appreciable increase in Zn concentration in solution at pH levels lower than 7.5. Higher FA concentrations (about 3.2 mM) were needed to solubilize Zn at pH ≥ 7.5. A competitive adsorption model describing Zn sorption as a function of Zn and FA concentrations and of pH is presented. According to the model, the main pH effect was due to the larger bonding energy of ZnOH+to the clay surface. The affinity of the Zn-FA complex to the clay is appreciably lower than that of ZnOH+; hence an addition of FA to the solution reduces Zn adsorption. © 1988 The Williams & Wilkins Co.
Note:
Related Files :
soil
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More details
DOI :
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
24377
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:06
Scientific Publication
Effects of fulvic acid and ph on zinc sorption on montmorillonite
146
Bar-Tal, A., Institute of Soils and Water, ARO, The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Bar-Yosef, B., Institute of Soils and Water, ARO, The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Chen, Y., The Seagram Center for Soil and Water Sciences, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot, Israel
Effects of fulvic acid and ph on zinc sorption on montmorillonite
The objective of this work was to study the interaction between fulvic acid (FA) and Zn sorption in montmorillonite suspensions at various pH levels in order to elucidate the role of FA in solubilizing soil Zn. Increases in FA solution concentration up to 1.2 mM resulted in an appreciable increase in Zn concentration in solution at pH levels lower than 7.5. Higher FA concentrations (about 3.2 mM) were needed to solubilize Zn at pH ≥ 7.5. A competitive adsorption model describing Zn sorption as a function of Zn and FA concentrations and of pH is presented. According to the model, the main pH effect was due to the larger bonding energy of ZnOH+to the clay surface. The affinity of the Zn-FA complex to the clay is appreciably lower than that of ZnOH+; hence an addition of FA to the solution reduces Zn adsorption. © 1988 The Williams & Wilkins Co.
Scientific Publication
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