Research Project
Grant-in-Aid for Challenging Exploratory Research
The objective of this study was to explore the possibility of 1) reducing phosphate absorption, 2) converting non-available iron and aluminum to calcium phosphates and 3) converting allophane into less phosphate-adsorbing minerals by applying converter slag.An allophanic Andisol was packed in lysimeters with and without slag and aged. Soil pH and Ca and Mg concentrations increased as slag application rate increased. The water extracts from the soils that received > 4 t/10 a of the converter slag were oversaturated with respect to hydroxyapatite. The allophane and ferrihydrite contents did not change but the content of humus-bound aluminum drastically decreased by about 60%. The phosphate adsorption also decreased as the slag application rate increased. These results suggest that by converter slag application it is possible to reduce the phosphate absorption of Andisols and convert the aluminum and iron phosphate to calcium phosphates.
All 2014 2013 2012
All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (10 results)
粘土科学
Volume: 51 Pages: 107-117
環境資源工学
Volume: 60 Pages: 167-173
130003391992
Volume: 514 Pages: 107-117
110009604680
