Abstract
Similarities in the adsorption isotherms of various non-polar volatile organic chemicals (VOCs) on dry soils and clay minerals are used to develop an empirical predictive method to estimate the isotherm parameters of the BDDT (three-parameter BET) model. Single-component adsorption data of nine VOCs on both soils and clay minerals and also nitrogen adsorption are examined. The familiar practice of reducing isotherms by the BET monolayer coverage is applied, and it is shown that isotherms of different VOCs on the same adsorbent collapse into a single isotherm. A simple prediction method based on this observation is presented.
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