Two-component Aqueous Systems

Two-component Aqueous Systems.—As a direct consequence of the increasing importance of the use of active carbon for water purification, there has been a recent spate of papers on the adsorption of a wide range of aqueous solutions. 

Stadnik and Eltekov have considered again their thermodynamic approach to adsorption from dilute aqueous solutions of microporous active carbons. An important problem in the use of the Dubinin-Radushkevich (D.R.) equation for both gas/solid and solution/solid systems is the mode of transition from this equation to the linear (Henry s law) region of the isotherm (see this Vol. p. 65). In a previous papers they found an empirical relationship between the quantity B/ 3 in the D.R. equation  

Radushkevich isotherm Cj c. Dashed curve, D.R. isotherm in range 0 - 

In the present paper they write n n = Q and consider the transi- 

It is stressed that c, K, and B are unambiguously defined by the constant, B, the affinity coefficient, /3, and the temperature, T. however, there appears to be 

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