حركيات امتزاز الفسفور في ترب ذات محتوى مختلف من الجبس

Abstract EN

A laboratory experiment was conducted to study the adsorption of phosphorous using kinetics equations.

The study included three different unstimulated soil samples in their content of gypsum (67, 138, 243) g kg-1 and different in their physical and chemical properties.

Phosphorous was added to it in the form of mono potassium phosphate KH2PO4.

With eight levels(80, 70, 60, 50, 40, 30, 20, 10) mg pL-1 The amount of adsorbed phosphorous was calculated at the time periods 1, 2, 4, 8, and 24 hours, 2, 4, 8 and 16 days.

The results of the study showed The amount of phosphorous adsorbed is proportional to the increase in both the added phosphorous and the soil content of gypsum, as it reached the highest amount of adsorbed phosphorus of 256 mg p kg-1 for sample G3 (243 g kg-1 of gypsum) at a level of 80 mg p L-1, while the minimum amount of phosphorous adsorbed was 51.37 mg p kg-1 for sample G1 (67 gm kg- 1 of gypsum) at a level of 10 mg p L-1 In order to get the best equation to describe the kinetics of phosphorus adsorption in different soils with their gypsum content, the kinetics equations (rank zero, first order, diffusion, force function, elovig) were used.

And the best equation for the description and for all soils was the zero-rank equation.