KINETIC STUDY OF CITRATE EFFECTS ON ORTHOPHOSPHATE SOLUBILITY IN AN ACIDIC, MONTMORILLONITIC SOIL.

Samuel J. Traina*, Garrison Sposito, Gordon R. Bradford, U. Kafkafi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

The objective of the experiments was to determine the time dependence of the reactions and to elucidate further the mechanism of orthophosphate solubility in a montmorillonitic soil separate containing exchangeable Al and added Citric acid, and suspended in 20 mol NaCl m** minus **3. In the absence of added organic acids, soluble orthophosphate and Al**3** plus activities were found to be consistent with the presence of an amorphous hydroxy-Al-phosphate solid at elapsed t greater than equivalent to 24 h. The time-dependent changes in aqueous orthophosphate and Al were consistent with a previously proposed reaction describing organic ligand-induced formation of an insoluble hydroxy-Al-phosphate.

Original languageEnglish
Pages (from-to)1483-1487
Number of pages5
JournalSoil Science Society of America Journal
Volume51
Issue number6
DOIs
StatePublished - 1987
Externally publishedYes

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