Effects of pH and organic acids on orthophosphate solubility in an acidic, montmorillonitic soil.

S. J. Traina, G. Sposito, D. Hesterberg, U. Kafkafi

Research output: Contribution to journalArticlepeer-review

96 Scopus citations

Abstract

In the absence of added organic acid, the solubility of residual o-phosphate in the soil decreased as the pH value was increased from 4 to 7. With o-phosphate additions that resulted in low aqueous-solution o-phosphate concentrations, the soil sorbed more o-phosphate at pH 7 than at 5.5. The solubility data appeared consistent with the presence of an Al-phosphate solid whose formation was initiated through the hydrolysis of exchangeable Al3+ and subsequent reaction of the hydrolytic product with o-phosphate in aqueous solution. -from Authors

Original languageEnglish
Pages (from-to)45-52
Number of pages8
JournalSoil Science Society of America Journal
Volume50
Issue number1
DOIs
StatePublished - 1986
Externally publishedYes

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