Copper Adsorption by Soils Exposed to Desiccation Stress1
- R. G. Lehmann and
- R. D. Harter2
Soils undergo substantial physical, chemical, and biological changes during the process of drying. Because soils are usually dried before their use in the laboratory, it is important to understand these changes if laboratory results are to be related to field conditions. The effects of air-drying (25°C) and over-drying (105°C) moist soils and the effects of remoistening air-dried and stored soils on copper adsorption are presented. Results indicate that oven-dried soils adsorbed 3 to 10% less copper than air-dried soils, which adsorbed 10% less than moist field soils. Remoistened samples, which were incubated for 1 month under aerated conditions, adsorbed an average of 12% more copper than air-dried and stored soils. Remoistened soils, which were incubated without aeration under a layer of water, showed no significant deviation from adsorption onto air-dried soils.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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