scholarly journals Determination of adsorption efficiency based on cation exchange capacity related to red earth, bone meal and pulverised fly ash as ameliorants to lead contaminated soils

2006 ◽  
Vol 3 (3) ◽  
pp. 269-280 ◽  
Author(s):  
E. Gatima ◽  
M. Mwinyihija ◽  
K. Killham
Keyword(s):  
Fly Ash ◽  
Cation Exchange ◽  
Contaminated Soils ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Adsorption Efficiency ◽  
Bone Meal ◽  
Red Earth

Acidification of soils on a transect from plains to slopes, south western New-South-Wales

Soil Research ◽  
1990 ◽  
Vol 28 (4) ◽  
pp. 539 ◽  
Author(s):  
CJ Chartres ◽  
RW Cumming ◽  
JA Beattie ◽  
GM Bowman ◽  
JT Wood
Keyword(s):  
Cation Exchange ◽  
Soil Acidification ◽  
Cation Exchange Capacity ◽  
Management Practices ◽  
New South ◽  
Exchange Capacity ◽  
Soil Types ◽  
The West ◽  
South Wales ◽  
Red Earth

Samples were collected from unimproved road reserves and adjacent paddocks on a 90 km transect crossing red-brown earth soils in the west and red earth soils in the east. Measurements of pH in water and CaCl2 indicated that the red earths have been acidified by approximately 0.5 pH units over the last 30-40 years. Small increases in CaCl2-extractable A1 were also recorded for the acidified red earths. The red-brown earths do not appear to have been markedly affected by soil acidification to date. Clay mineralogical data and measurements of cation exchange capacity of the <2 �m fraction indicate that red-brown earths are better buffered against acidification than red earths. However, small differences in management practices and rainfall along the transect may also be partially responsible for differences in acidification between soil types.

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