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Phosphates in Soils Treàted with Sewage Water: III. Kinetic Studies on the Reaction of Phosphate with Aluminum Compounds
Author(s) -
Riemsdijk W. H.,
Weststrate F. A.,
Beek J.
Publication year - 1977
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1977.00472425000600010007x
Subject(s) - phosphate , chemistry , sewage , nuclear chemistry , aluminium , soil water , mineralogy , environmental chemistry , inorganic chemistry , environmental engineering , geology , organic chemistry , environmental science , soil science
The reaction of phosphate with aluminumhydroxide and αAl 2 O 3 was studied at an initial phosphate concentration level of 0.35 mmoles/liter and a temperature of 20C. Solutions of KH 2 PO 4 and synthetic inorganic sewage water were used as phosphate sources. In all experiments involved, a marked change of the reaction rate was found after about 1 day in the case of Al(OH) 3 and about 4 days in the case of αAl 2 O 3 . This can be explained by the assumption that at these points the formation of a solid aluminum‐phosphate is initiated. This new phase was later identified as Sterrettite by means of electronmicroscopy, electron diffraction, and X‐ray diffraction.