Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/34263
Type: | Journal article |
Title: | Phosphorus release from phosphate rock and iron phosphate by low-molecular-weight organic acids |
Author: | Xu, R. Zhu, Y. Chittleborough, D. |
Citation: | Journal of Environmental Sciences, 2004; 16(1):5-8 |
Publisher: | I O S Press |
Issue Date: | 2004 |
ISSN: | 1001-0742 1878-7320 |
Statement of Responsibility: | 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: | Aurora harvest 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.