Abstract
The present investigation was conducted to study behavior of boron adsorption in six Ninevah soil samples, different in clay and available boron contains, by using isotherm equilibrium adsorption with boron solutions at different concentrations (0,0.5,1,2,4,6,8,10,20) mg B. L-1 . Results show that adsorption phenomena was successfully described by using langmuir one and two surface and freundlich equations. Langmuir two was the best fitting equation. A maximum adsorption was in fine texture and adsorption parameters (m,k)were have a highly significant relations with calcium carbonate, clay and (clay+silt). The results also show there are two types of adsorption-sites according to langmuir two surface equation. The first site had a high bonding energy with low adsorption capacity while the second site had low bonding energy with high adsorption capacity. The average of adsorption capacity were (3.56 , 246.58) mg B. kg-1 for first and second surface adsorption respectively. While bonding energy were (14.79 , 0.0099) cm3. µg-1B, respectively.
