
TY  - JOUR
A1  - Maguire, M 
A1  - Slavek, J 
A1  - Vimpany, I 
A1  - Higginson, FR 
A1  - Pickering, WF 
T1  - Influence of pH on copper and zinc uptake by soil clays
JF  - Soil Research
JO  - Soil Res.
Y1  - 1981
VL  - 19
IS  - 3
SP  - 217
EP  - 229
KW  - 
UR  - https://doi.org/10.1071/SR9810217 
N2  - Nine soil clays were isolated from a wide range of soil horizons in New South Wales, and after minerological characterization, the adsorptive behaviour of the NH4+ form of the organic-free material was examined. The amount of copper and zinc sorbed increased with pH and, prior to precipitation of hydroxy species material, differences in pH-dependent capacity were discernible, reflecting differences in clay composition. Uptake at a fixed pH (5) did not always vary with concentration in accordance with Langmuir isotherms. Calculated parameters for amenable systems were similar to those observed by other workers, but capacities at a fixed pH proved to be less informative than pH dependence curves. The implications of the data for availability of the metal ions in the environment have been considered. 
ER  -

