Reversible and resistant components of hexachlorocyclohexane (lindane) sorption to new jersey coastal plain aquifer solids

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Abstract
Studies examining the sorptive characteristics of lindane to representative soil samples from New Jersey's coastal plain aquifers were performed. The soil from the Cohansey aquifer is a sand containing a 4.4 percent organic fraction. The soil from the Potomac‐Raritan‐Magothy aquifer is a sandy loam with a 2.2 percent organic fraction. Equilibrium studies exhibited linear adsorption isotherms with an association constant of 0.013 1/g for the Cohansey solids and 0.011 1/g for the Potomac‐Raritan‐Magothy solids. Desorption data indicated a pronounced hysteresis, indicating that the sorption processes for these systems were not completely reversible. Both Freundlich(indicating complete desorption) and linear (indicating incomplete desorption) isotherms were fitted to the data.