Nitrate nitrogen not adsorbed on soil colloid
surface and moved to deeper depth.
Phosphate is known to adsorb specifically onto soil colloid
by ligand exchange, which increases negative charge.
A fourth important soil colloid
type is the organic soil colloids
, or humus.
However, a greater lowering of hydraulic conductivity in the As-affected soils with time of flow allowed enhanced contact between the soil colloid
fraction and the passing As solution, leading to increased sorption-diffusion by the soil colloids
The specific adsorption of phosphate mainly occurred on the Fe/A1 oxides; hence, the highest content of free Fe/Al oxides, in the Oxisol from Yunnan, resulted in the greatest specific adsorption of phosphate on the soil and caused the maximum decrease in zeta potential of the soil colloid
Ion exchange takes place when one of the ions in the soil solution replaces one of the ions on the soil colloid
Adherence ability of herbicide in soil depends on kind of soil colloid
and its amount, ionic properties of herbicide and soil moisture content (Rastgar, 2000).
Exchange between a cation in solution and one adsorbed on a soil colloid
In terrestrial ecosystems, sorption-desorption reactions on soil colloid
surfaces control the concentration of heavy metal in soil solution, and hence may affect their bioavailability, leaching, and toxicity (Backes et al.
However, exchangeable cation ratios are 'peripheral' to arguments relating to structural stability, because structural stability, insofar as it is affected by the dispersion or coagulation of the soil colloid
, depends on the properties of the electrical double layer and thus on the equilibrium solution ratios and concentrations (cf.
become the dominant ions on soil colloid
In the soil DNA molecules adsorb to soil colloids
and minerals that prevent its enzymatic degradation particularly from DNases (Romanowski et al.