TY - JOUR
T1 - KINETIC STUDY OF CITRATE EFFECTS ON ORTHOPHOSPHATE SOLUBILITY IN AN ACIDIC, MONTMORILLONITIC SOIL.
AU - Traina, Samuel J.
AU - Sposito, Garrison
AU - Bradford, Gordon R.
AU - Kafkafi, U.
PY - 1987
Y1 - 1987
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0023451678&partnerID=8YFLogxK
U2 - 10.2136/sssaj1987.03615995005100060015x
DO - 10.2136/sssaj1987.03615995005100060015x
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AN - SCOPUS:0023451678
SN - 0361-5995
VL - 51
SP - 1483
EP - 1487
JO - Soil Science Society of America Journal
JF - Soil Science Society of America Journal
IS - 6
ER -