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The sorption of PCB congeners 24 (IUPAC number 8), 22 55 (52) and 22 44 55 (153) by eight soils differing in their organic carbon content (2.3 to 0.2% by Wt.) and expandable clay mineral content (17 to 53 % by wt.) has been investigated for 0.1 g/L soil-water suspensions. The time to reach sorption equilibrium, i.e. sorption-diffusion equilibrium, for a highly aggregated montmorillonitic...
The desorption of 13 PCB congeners from four soils has been investigated using the gas purge technique. The soils from PCB spill sites had been in contact with Aroclor 12421254 mixtures for 3 or more years; thus, sorption equilibrium is presumed to have been obtained. Soils were engineered ground cover materials used at utility industry substations and consisted of fine rock chips and sand-silt-clay...
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