Please use this identifier to cite or link to this item:
|Title:||Phosphorus release from phosphate rock and iron phosphate by low-molecular-weight organic acids|
|Citation:||Journal of Environmental Sciences, 2004; 16(1):5-8|
|Publisher:||I O S Press|
|Xu, Ren-kou; Zhu, Yong-guan; Chittleborough, David|
|Abstract:||Low-molecular-weight(LMW) organic acids widely exist in soils, particularly in the rhizosphere. A series of batch experiments were carried out to investigate the phosphorus release from rock phosphate and iron phosphate by low-molecular-weight organic acids. Results showed that citric acid had the highest capacity to solubilize P from both rock and iron phosphate. P solubilization from rock phosphate and iron phosphate resulted in net proton consumption. P release from rock phosphate was positively correlated with the pKa values. P release from iron phosphate was positively correlated with Fe-organic acid stability constants except for aromatic acids, but was notcorrelated with pKa. Increase in the concentrations of organic acids enhanced P solubilization from both rock and iron phosphate almost linearly. Addition of phenolic compounds further increased the P release from iron phosphate. Initial solution pH had much more substantial effect on P release from rock phosphate than from iron phosphate.|
|Keywords:||Plant Roots; Acids; Iron; Phosphorus; Soil; Hydrogen-Ion Concentration; Molecular Weight; Geology; Geological Phenomena|
|Appears in Collections:||Earth and Environmental Sciences publications|
Environment Institute publications
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.