Effect of Levels of Organic Matter on Adsorption and Liberation of Gypsum Soil

Abstract

In an experiment for iron adsorption for nine levels of iron (0,1,2,5,10,25,50,100,200)mg/L. This experiment was carried out to find the behaviour of iron in soils of varying gypsum and organic content to know the conditions for adsorption and liberation of iron in them, using three gypsums (10,20,30)% with percentages of organic matter from sheep feces (0,1,2)%. The Langmeyer equation, the Feinrendlach equation, and the Timken equation were used, through which the most excellent adsorption and binding energy were calculated. The most outstanding adsorption values were In medium gypsum soil with sheep feces (2%) with a ratio in the Langmeyer equation (46.948) mg/kg. The highest binding energy value was (7.497) L.mg-1 in soils with low gypsum content as a control. Lanckmeyer equation was chosen as the best It is fair to describe the adsorption process with a capacity determination coefficient of (85)%. In comparison, the highest value for the maximum adsorption of the Freindlch equation was recorded (0.788) litre.mg-1 in soils with high gypsum content with sheep feces by (2%). The highest percentage of binding energy in medium soils, gypsum control, was (16.195) mg.kg-1. The highest binding energy value in the Tamken equation was (12.436) mg.kg-1 in medium gypsum control soil. The highest binding energy value was (2.844) L.kg-1 in medium gypsum soil control. As for the liberation experiment, the highest values for liberated iron were in the high levels of addition (18.513) mg.kg-1 in soils with low gypsum content (2)% of sheep feces, noting the low values Released iron with low values of adsorbed iron.