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Article: Influence of pH on a secondary effect of phosphate reaction: the decrease in sorption of newly added phosphate.
- Article from:
- Australian Journal of Soil Research
- Article date:
- September 1, 2002
- Author:
CopyrightCOPYRIGHT 2002 CSIRO Publishing. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Introduction
When specifically sorbed ions react with soil, the charge on the soil is changed. Anions make it more negative; cations more positive. With increasing time, it appears that the reacting ion penetrates towards the centre of the reacting particle. Consequently the change in charge becomes `semi-permanent'. This change in charge alters the surface properties of the soil particles. Of the many specifically sorbed ions that can react with soil, phosphate is the only one added in sufficient quantity and frequency for the effects to be important. For convenience, I shall refer to these secondary effects of phosphate as P2 effects.
P2 effects occur ...