CHED 1096 |
| Phosphorus (P) adsorption by soils is an important parameter for determining the environmental fate of P. While P sorption isotherms are useful for the characterization of the P sorption capacity of soils, traditional P sorption isotherms are too time-consuming and expensive for routine use. A single point P sorption index (PSI) may be an effective alternative to the traditional isotherms for determining the P sorption capacity of soil. In order for the PSI method to become widely adopted as a routine test of a soil's P retention capacity, it must be evaluated over a wider range of soils. This study correlated the P sorption maxima as determined by the traditional Langmuir equation to the PSI method. Separate air-dry soil samples of select mollisols were subjected to: 1) a series of equilibrating solutions ranging in their P concentrations and 2) a single solution of known P concentration. The P sorption maxima were determined by modeling the data to the linearized form of the Langmuir equation. The correlations between the Langmuir P sorption maxima and PSI are presented. |
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Undergraduate Research Poster Session: Environmental Chemistry
2:00 PM-4:00 PM, Monday, March 26, 2007 Hyatt Regency Chicago -- Riverside Center, Poster
Division of Chemical Education |