| Autor: |
Nikovskaya, G. N., Ul'berg, Z. R., Borisova, E. N., Savkin, A. G. |
| Předmět: |
|
| Zdroj: |
Colloid Journal; May2006, Vol. 68 Issue 3, p311-315, 5p, 1 Diagram, 3 Charts, 2 Graphs |
| Abstrakt: |
The influence of various reclamation agents (montmorillonite, peat, activated sludge microbocenosis) on the stability of dispersions of the colloidal fraction of meadow chernozem soil is studied. It is established that biocolloids possess the strongest coagulating action in the aforementioned series of reclamation agents. It is shown that, in the process of microorganism growth involving glucose or polypeptides as a carbon source, exopolymers are synthesized that caused the coagulation of soil dispersions. Upon the growth of microorganisms on polypeptides (alkaligeneous metabolism), precipitates are formed that are denser and less peptized by water than those grown on glucose (acidogeneous metabolism). The addition of montmorillonite and peat intensifies the aggregation processes in soil-microbe heterodispersions. The inverse relationship between the content of an organic substance in a colloidal system and the stability of aggregates of soil colloids is revealed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
