Surface Charge Manipulation in Constant Surface Potential Soil Colloids: II. Effect on Solute Transport

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Abstract
Potassium breakthrough curves from soil columns containing samples collected from an oxic horizon of a Typic Torrox shifted to the right as the sample was treated with increasing levels of P. The shift in the breakthrough curve was significantly related to a lowering of the zero point of charge. The lowering of the zero point of charge was in turn related to levels of applied P. The anion accompanying K also had a marked effect on the position of the breakthrough curve. When the accompanying anion was Cl, S, and P respectively, the K concentration in the effluent attained one‐half of influent concentration at 4.25, 5.30, and 8.20 pore volumes.

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