Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5210647 | Reactive and Functional Polymers | 2010 | 6 Pages |
Abstract
The temperature-swing adsorption (TSA) of heavy metal ions onto 2-(dimethylamino)ethyl methacrylate (DMAEMA) gel has been examined. The DMAEMA gel adsorbs precious metal ions (Pt(IV), Au(III), and Pd(II)) in HCl aqueous media as a result of the electrostatic interactions between the protonated amino groups in the gel and the anionic chloro complexes, while it is inactive against Cu(II) and Ni(II) cations. The amount of Pt(IV) ions adsorbed onto the DMAEMA gel decreases linearly with an increase in temperature. The TSA operation was successfully carried out; the DMAEMA gel repeatedly adsorbed and desorbed Pt(IV) ions in the temperature-swing operation between 20 °C and 60 °C. The TSA technique using the DMAEMA gel is simple, environment-friendly, and potentially applicable in various separation processes for precious metals in industries.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Hideaki Tokuyama, Noriaki Ishihara,