Open AccessAdsorption Equilibria of Single-Component and Multi-Component Metal Ions on to Scrap Rubber
Author(s) -
Mahmoud A. Zarraa
Publication year - 1998
Publication title -
adsorption science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.682
H-Index - 36
eISSN - 2048-4038
pISSN - 0263-6174
DOI - 10.1177/026361749801600607
Subject(s) - chemistry , adsorption , natural rubber , scrap , copper , zinc , langmuir , freundlich equation , cadmium , component (thermodynamics) , metal , metal ions in aqueous solution , inorganic chemistry , chemical engineering , thermodynamics , organic chemistry , physics , engineering
The ability of scrap rubber to adsorb the three metal ions, copper, cadmium and zinc, in single-component and multi-component mixtures in aqueous solutions has been studied. A comparison has been made between the single-component saturation uptake and the multi-component uptakes. The experimental results were fitted to the Langmuir, Freundlich and Redlich–Peterson isotherms. The correlation coefficients obtained from plotting these isotherms gave a measure of the conformity of the data to a linear trend and corresponded to a perfect fit. The isotherms indicated a competitive uptake, with copper being preferentially adsorbed by scrap rubber in multi-component solutions. The capacity of scrap rubber for the single-component metals was in the order: Cd > Cu > Zn. On the other hand, the order of preference of scrap rubber for metals in multi-component mixtures was: Cu > Cd > Zn.