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| Titel: |
Partitioning of inorganic orthophosphate in soil-water systems |
| Auteur: |
Berkheiser, Vaughn E. Street, Jimmy J. Rao, P. S. C. Yuan, T. L. Ellis, Boyd G. |
| Verschenen in: |
Critical reviews in environmental science and technology |
| Paginering: | Jaargang 10 (1980) nr. 3 pagina's 179-224 |
| Jaar: |
1980-10 |
| Inhoud: |
The fate of phosphorus in terrestrial ecosystems is of concern because it has been identified as a major contributor to eutrophication of surface water supplies. In order to ascertain the impact of inorganic phosphate on water quality, the chemical speciation, concentration, bio-availability, and distribution in the soil-water system are prerequisites. Environmental regulations and land disposal of organic wastes also require quantifying the partitioning of inorganic phosphate between solid and solution phases in soil-water systems. In order to develop a partition coefficient or a partition function, several aspects of the solution chemistry of inorganic phosphate were reviewed. Several sorption mechanisms and mathematical models have been used to describe equilibrium sorption and the time-dependent phosphate removal from solution. The most frequently applied equilibrium model was the Langmuir equation in the single-surface form. Because of the amount of Langmuir data available, Langmuir parameters were compiled for the purpose of obtaining a partition coefficient and for correlating Langmuir parameters with selected soil chemical properties. A lack of uniformity was noted in experimental methods used for determining soil properties and phosphate sorption parameters. Correlation of sorption parameters with soil chemical properties indicated that “active”; iron and aluminum species are involved in phosphate sorption. The “active”; species appear to be quantified best by oxalate extractants. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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