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Adsorption and desorption of quaternary ammonium herbicides (paraquat, diquat, and difenzoquat) has been studied in four acid vineyard soils with a range of organic matter and copper contents, in order to assess the influence of copper on herbicide adsorption. Adsorption at equilibrium has been studied in batch experiments, and kinetics have been studied in a stirred flow chamber. Adsorption and desorption...
The objective of this work was to determine the retention of five metals on pine bark using stirred flow and batch-type experiments. Resulting from batch-type kinetic experiments, adsorption was rapid, with no significant differences for the various contact times. Adsorption was between 98 and 99% for Pb 2+ , 83–84% for Cu 2+ , 78–84% for Cd 2+ , 77–83% for Zn 2+ ,...
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