Effects of nonreversibility, particle concentration, and ionic strength on heavy-metal sorption

✍ Scribed by Di Toro, Dominic M.; Mahony, John D.; Kirchgraber, Paul R.; O'Byrne, Ann L.; Pasquale, Louis R.; Piccirilli, Dora C.

• Book ID: 120585362
• Publisher: American Chemical Society
• Year: 1986
• Tongue: English
• Weight: 874 KB
• Volume: 20
• Category: Article
• ISSN: 0013-936X
• DOI: 10.1021/es00143a006

✦ Synopsis

The reversible component partition coefficient for nickel and cobalt sorbed to montmorillonite and quartz is shown to be a function of particle Concentration. Resuspension and dilution experiments appear to exclude explanations that rely on nonseparated particles and/or complexing ligands associated with the particles. A particle interaction model is presented that assumes the existence of an additional desorption reaction that results from particleparticle interactions. The model is in conformity with the experimental results. The observed partition coefficient decrease with increasing ionic strength is a result of the decrease in the classical, low particle concentration limit, partition coefficient. The particle-particle interaction is independent of ionic strength.