Abstract
AbstractMiscible displacement techniques were used to determine the effects of surface area, cation exchange capacity, and organic matter content on the movement of atrazine through saturated soil columns. A 0.05N BaCl2 water solution containing 5 ppm atrazine was added to separate lucite cylinders each containing either silica sand, a fine sandy loam, silt loam, silty clay loam, or a muck soil. Breakthrough and closeout curves were plotted for atrazine as well as for the chloride and barium ions. Linear regression curves for relationships between the surface area, the exchange capacity, and the organic matter content of the soil and the difference in volume of solution required for chloride and atrazine breakthrough were drawn. These curves showed that retention by the soil is significantly higher for soils with greater surface areas, exchange capacities, and organic matter content.
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