Adsorption of Cationic Dyes by Acrylic Films I—Sorption Isotherms

  title={Adsorption of Cationic Dyes by Acrylic Films I—Sorption Isotherms},
  author={Richard J. Harwood and Robert Mcgregor and Richard H. Peters},
Sorption isotherms have been determined for five basic dyes on films prepared from an acrylic polymer. The results can be explained by an ion-exchange mechanism over 80% of the concentration range, or by a simple ion-distribution mechanism over the whole of the range. Addition of sodium ions reduces the dye uptake in accordance with the suggested mechanism. Isotherms of a dye mixture have shown that competition occurs, and the ‘ion selectivity’ constants calculated from these results agree well… CONTINUE READING