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Negative surface charge distribution among constituents of the soil clay fraction as influenced by pH changes

100%

Jozefaciuk G.

Zeszyty Problemowe Postępów Nauk Rolniczych

1992

tom 398

73-77

An examination of negative charge distribution among solid soil phase components and its relations to pH of the equilibrium solution was conducted by model experiments on clays separated from selected acidic soils. It was noted that negative charge blocking by iron and aluminium oxides occurs, with the most pronounced effect in brown and podzol clays. On the basis of measured values of sample charges before and after removal of organic matter the organic matter charges were calculated to have a more linear pH dependence than that seen for natural clays. This effect is attributed to the presence of positive charges in the clays investigated.

The influence of aluminium on negative soil charge

100%

Jozefaciuk G., Stawinski J., Arsova A., Urumova-Pesheva A.

Zeszyty Problemowe Postępów Nauk Rolniczych

1992

tom 398

79-81

The influence of pH and aluminium on soil clays’ negative charge was investigated for clays separated from acidic soils of different origin. It was observed that aluminium caused a negative charge decrease due possibly to nonexchangeable Al polycations adsorption in the 4-6 pH range. Aluminium complexing by organic matter can diminish soil negative charge in a broad range of pH.

Ograniczanie wyników

2 Zeszyty Problemowe Postępów Nauk Rolniczych

2 Jozefaciuk G.

1 Arsova A.

1 Stawinski J.

1 Urumova-Pesheva A.

2 1992

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Negative surface charge distribution among constituents of the soil clay fraction as influenced by pH changes

The influence of aluminium on negative soil charge